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-rw-r--r--arch/ppc64/kernel/prom_init.c2051
1 files changed, 0 insertions, 2051 deletions
diff --git a/arch/ppc64/kernel/prom_init.c b/arch/ppc64/kernel/prom_init.c
deleted file mode 100644
index 6375f40b23d..00000000000
--- a/arch/ppc64/kernel/prom_init.c
+++ /dev/null
@@ -1,2051 +0,0 @@
-/*
- *
- *
- * Procedures for interfacing to Open Firmware.
- *
- * Paul Mackerras August 1996.
- * Copyright (C) 1996 Paul Mackerras.
- *
- * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
- * {engebret|bergner}@us.ibm.com
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#undef DEBUG_PROM
-
-#include <stdarg.h>
-#include <linux/config.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/init.h>
-#include <linux/threads.h>
-#include <linux/spinlock.h>
-#include <linux/types.h>
-#include <linux/pci.h>
-#include <linux/proc_fs.h>
-#include <linux/stringify.h>
-#include <linux/delay.h>
-#include <linux/initrd.h>
-#include <linux/bitops.h>
-#include <asm/prom.h>
-#include <asm/rtas.h>
-#include <asm/abs_addr.h>
-#include <asm/page.h>
-#include <asm/processor.h>
-#include <asm/irq.h>
-#include <asm/io.h>
-#include <asm/smp.h>
-#include <asm/system.h>
-#include <asm/mmu.h>
-#include <asm/pgtable.h>
-#include <asm/pci.h>
-#include <asm/iommu.h>
-#include <asm/btext.h>
-#include <asm/sections.h>
-#include <asm/machdep.h>
-
-#ifdef CONFIG_LOGO_LINUX_CLUT224
-#include <linux/linux_logo.h>
-extern const struct linux_logo logo_linux_clut224;
-#endif
-
-/*
- * Properties whose value is longer than this get excluded from our
- * copy of the device tree. This value does need to be big enough to
- * ensure that we don't lose things like the interrupt-map property
- * on a PCI-PCI bridge.
- */
-#define MAX_PROPERTY_LENGTH (1UL * 1024 * 1024)
-
-/*
- * Eventually bump that one up
- */
-#define DEVTREE_CHUNK_SIZE 0x100000
-
-/*
- * This is the size of the local memory reserve map that gets copied
- * into the boot params passed to the kernel. That size is totally
- * flexible as the kernel just reads the list until it encounters an
- * entry with size 0, so it can be changed without breaking binary
- * compatibility
- */
-#define MEM_RESERVE_MAP_SIZE 8
-
-/*
- * prom_init() is called very early on, before the kernel text
- * and data have been mapped to KERNELBASE. At this point the code
- * is running at whatever address it has been loaded at, so
- * references to extern and static variables must be relocated
- * explicitly. The procedure reloc_offset() returns the address
- * we're currently running at minus the address we were linked at.
- * (Note that strings count as static variables.)
- *
- * Because OF may have mapped I/O devices into the area starting at
- * KERNELBASE, particularly on CHRP machines, we can't safely call
- * OF once the kernel has been mapped to KERNELBASE. Therefore all
- * OF calls should be done within prom_init(), and prom_init()
- * and all routines called within it must be careful to relocate
- * references as necessary.
- *
- * Note that the bss is cleared *after* prom_init runs, so we have
- * to make sure that any static or extern variables it accesses
- * are put in the data segment.
- */
-
-
-#define PROM_BUG() do { \
- prom_printf("kernel BUG at %s line 0x%x!\n", \
- RELOC(__FILE__), __LINE__); \
- __asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \
-} while (0)
-
-#ifdef DEBUG_PROM
-#define prom_debug(x...) prom_printf(x)
-#else
-#define prom_debug(x...)
-#endif
-
-
-typedef u32 prom_arg_t;
-
-struct prom_args {
- u32 service;
- u32 nargs;
- u32 nret;
- prom_arg_t args[10];
- prom_arg_t *rets; /* Pointer to return values in args[16]. */
-};
-
-struct prom_t {
- unsigned long entry;
- ihandle root;
- ihandle chosen;
- int cpu;
- ihandle stdout;
- ihandle disp_node;
- struct prom_args args;
- unsigned long version;
- unsigned long root_size_cells;
- unsigned long root_addr_cells;
-};
-
-struct pci_reg_property {
- struct pci_address addr;
- u32 size_hi;
- u32 size_lo;
-};
-
-struct mem_map_entry {
- u64 base;
- u64 size;
-};
-
-typedef u32 cell_t;
-
-extern void __start(unsigned long r3, unsigned long r4, unsigned long r5);
-
-extern void enter_prom(struct prom_args *args, unsigned long entry);
-extern void copy_and_flush(unsigned long dest, unsigned long src,
- unsigned long size, unsigned long offset);
-
-extern unsigned long klimit;
-
-/* prom structure */
-static struct prom_t __initdata prom;
-
-#define PROM_SCRATCH_SIZE 256
-
-static char __initdata of_stdout_device[256];
-static char __initdata prom_scratch[PROM_SCRATCH_SIZE];
-
-static unsigned long __initdata dt_header_start;
-static unsigned long __initdata dt_struct_start, dt_struct_end;
-static unsigned long __initdata dt_string_start, dt_string_end;
-
-static unsigned long __initdata prom_initrd_start, prom_initrd_end;
-
-static int __initdata iommu_force_on;
-static int __initdata ppc64_iommu_off;
-static int __initdata of_platform;
-
-static char __initdata prom_cmd_line[COMMAND_LINE_SIZE];
-
-static unsigned long __initdata prom_memory_limit;
-static unsigned long __initdata prom_tce_alloc_start;
-static unsigned long __initdata prom_tce_alloc_end;
-
-static unsigned long __initdata alloc_top;
-static unsigned long __initdata alloc_top_high;
-static unsigned long __initdata alloc_bottom;
-static unsigned long __initdata rmo_top;
-static unsigned long __initdata ram_top;
-
-static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE];
-static int __initdata mem_reserve_cnt;
-
-static cell_t __initdata regbuf[1024];
-
-
-#define MAX_CPU_THREADS 2
-
-/* TO GO */
-#ifdef CONFIG_HMT
-struct {
- unsigned int pir;
- unsigned int threadid;
-} hmt_thread_data[NR_CPUS];
-#endif /* CONFIG_HMT */
-
-/*
- * This are used in calls to call_prom. The 4th and following
- * arguments to call_prom should be 32-bit values. 64 bit values
- * are truncated to 32 bits (and fortunately don't get interpreted
- * as two arguments).
- */
-#define ADDR(x) (u32) ((unsigned long)(x) - offset)
-
-/*
- * Error results ... some OF calls will return "-1" on error, some
- * will return 0, some will return either. To simplify, here are
- * macros to use with any ihandle or phandle return value to check if
- * it is valid
- */
-
-#define PROM_ERROR (-1u)
-#define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR)
-#define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR)
-
-
-/* This is the one and *ONLY* place where we actually call open
- * firmware from, since we need to make sure we're running in 32b
- * mode when we do. We switch back to 64b mode upon return.
- */
-
-static int __init call_prom(const char *service, int nargs, int nret, ...)
-{
- int i;
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
- va_list list;
-
- _prom->args.service = ADDR(service);
- _prom->args.nargs = nargs;
- _prom->args.nret = nret;
- _prom->args.rets = (prom_arg_t *)&(_prom->args.args[nargs]);
-
- va_start(list, nret);
- for (i=0; i < nargs; i++)
- _prom->args.args[i] = va_arg(list, prom_arg_t);
- va_end(list);
-
- for (i=0; i < nret ;i++)
- _prom->args.rets[i] = 0;
-
- enter_prom(&_prom->args, _prom->entry);
-
- return (nret > 0) ? _prom->args.rets[0] : 0;
-}
-
-
-static unsigned int __init prom_claim(unsigned long virt, unsigned long size,
- unsigned long align)
-{
- return (unsigned int)call_prom("claim", 3, 1,
- (prom_arg_t)virt, (prom_arg_t)size,
- (prom_arg_t)align);
-}
-
-static void __init prom_print(const char *msg)
-{
- const char *p, *q;
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
-
- if (_prom->stdout == 0)
- return;
-
- for (p = msg; *p != 0; p = q) {
- for (q = p; *q != 0 && *q != '\n'; ++q)
- ;
- if (q > p)
- call_prom("write", 3, 1, _prom->stdout, p, q - p);
- if (*q == 0)
- break;
- ++q;
- call_prom("write", 3, 1, _prom->stdout, ADDR("\r\n"), 2);
- }
-}
-
-
-static void __init prom_print_hex(unsigned long val)
-{
- unsigned long offset = reloc_offset();
- int i, nibbles = sizeof(val)*2;
- char buf[sizeof(val)*2+1];
- struct prom_t *_prom = PTRRELOC(&prom);
-
- for (i = nibbles-1; i >= 0; i--) {
- buf[i] = (val & 0xf) + '0';
- if (buf[i] > '9')
- buf[i] += ('a'-'0'-10);
- val >>= 4;
- }
- buf[nibbles] = '\0';
- call_prom("write", 3, 1, _prom->stdout, buf, nibbles);
-}
-
-
-static void __init prom_printf(const char *format, ...)
-{
- unsigned long offset = reloc_offset();
- const char *p, *q, *s;
- va_list args;
- unsigned long v;
- struct prom_t *_prom = PTRRELOC(&prom);
-
- va_start(args, format);
- for (p = PTRRELOC(format); *p != 0; p = q) {
- for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q)
- ;
- if (q > p)
- call_prom("write", 3, 1, _prom->stdout, p, q - p);
- if (*q == 0)
- break;
- if (*q == '\n') {
- ++q;
- call_prom("write", 3, 1, _prom->stdout,
- ADDR("\r\n"), 2);
- continue;
- }
- ++q;
- if (*q == 0)
- break;
- switch (*q) {
- case 's':
- ++q;
- s = va_arg(args, const char *);
- prom_print(s);
- break;
- case 'x':
- ++q;
- v = va_arg(args, unsigned long);
- prom_print_hex(v);
- break;
- }
- }
-}
-
-
-static void __init __attribute__((noreturn)) prom_panic(const char *reason)
-{
- unsigned long offset = reloc_offset();
-
- prom_print(PTRRELOC(reason));
- /* ToDo: should put up an SRC here */
- call_prom("exit", 0, 0);
-
- for (;;) /* should never get here */
- ;
-}
-
-
-static int __init prom_next_node(phandle *nodep)
-{
- phandle node;
-
- if ((node = *nodep) != 0
- && (*nodep = call_prom("child", 1, 1, node)) != 0)
- return 1;
- if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
- return 1;
- for (;;) {
- if ((node = call_prom("parent", 1, 1, node)) == 0)
- return 0;
- if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
- return 1;
- }
-}
-
-static int __init prom_getprop(phandle node, const char *pname,
- void *value, size_t valuelen)
-{
- unsigned long offset = reloc_offset();
-
- return call_prom("getprop", 4, 1, node, ADDR(pname),
- (u32)(unsigned long) value, (u32) valuelen);
-}
-
-static int __init prom_getproplen(phandle node, const char *pname)
-{
- unsigned long offset = reloc_offset();
-
- return call_prom("getproplen", 2, 1, node, ADDR(pname));
-}
-
-static int __init prom_setprop(phandle node, const char *pname,
- void *value, size_t valuelen)
-{
- unsigned long offset = reloc_offset();
-
- return call_prom("setprop", 4, 1, node, ADDR(pname),
- (u32)(unsigned long) value, (u32) valuelen);
-}
-
-/* We can't use the standard versions because of RELOC headaches. */
-#define isxdigit(c) (('0' <= (c) && (c) <= '9') \
- || ('a' <= (c) && (c) <= 'f') \
- || ('A' <= (c) && (c) <= 'F'))
-
-#define isdigit(c) ('0' <= (c) && (c) <= '9')
-#define islower(c) ('a' <= (c) && (c) <= 'z')
-#define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c))
-
-unsigned long prom_strtoul(const char *cp, const char **endp)
-{
- unsigned long result = 0, base = 10, value;
-
- if (*cp == '0') {
- base = 8;
- cp++;
- if (toupper(*cp) == 'X') {
- cp++;
- base = 16;
- }
- }
-
- while (isxdigit(*cp) &&
- (value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) {
- result = result * base + value;
- cp++;
- }
-
- if (endp)
- *endp = cp;
-
- return result;
-}
-
-unsigned long prom_memparse(const char *ptr, const char **retptr)
-{
- unsigned long ret = prom_strtoul(ptr, retptr);
- int shift = 0;
-
- /*
- * We can't use a switch here because GCC *may* generate a
- * jump table which won't work, because we're not running at
- * the address we're linked at.
- */
- if ('G' == **retptr || 'g' == **retptr)
- shift = 30;
-
- if ('M' == **retptr || 'm' == **retptr)
- shift = 20;
-
- if ('K' == **retptr || 'k' == **retptr)
- shift = 10;
-
- if (shift) {
- ret <<= shift;
- (*retptr)++;
- }
-
- return ret;
-}
-
-/*
- * Early parsing of the command line passed to the kernel, used for
- * "mem=x" and the options that affect the iommu
- */
-static void __init early_cmdline_parse(void)
-{
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
- char *opt, *p;
- int l = 0;
-
- RELOC(prom_cmd_line[0]) = 0;
- p = RELOC(prom_cmd_line);
- if ((long)_prom->chosen > 0)
- l = prom_getprop(_prom->chosen, "bootargs", p, COMMAND_LINE_SIZE-1);
-#ifdef CONFIG_CMDLINE
- if (l == 0) /* dbl check */
- strlcpy(RELOC(prom_cmd_line),
- RELOC(CONFIG_CMDLINE), sizeof(prom_cmd_line));
-#endif /* CONFIG_CMDLINE */
- prom_printf("command line: %s\n", RELOC(prom_cmd_line));
-
- opt = strstr(RELOC(prom_cmd_line), RELOC("iommu="));
- if (opt) {
- prom_printf("iommu opt is: %s\n", opt);
- opt += 6;
- while (*opt && *opt == ' ')
- opt++;
- if (!strncmp(opt, RELOC("off"), 3))
- RELOC(ppc64_iommu_off) = 1;
- else if (!strncmp(opt, RELOC("force"), 5))
- RELOC(iommu_force_on) = 1;
- }
-
- opt = strstr(RELOC(prom_cmd_line), RELOC("mem="));
- if (opt) {
- opt += 4;
- RELOC(prom_memory_limit) = prom_memparse(opt, (const char **)&opt);
- /* Align to 16 MB == size of large page */
- RELOC(prom_memory_limit) = ALIGN(RELOC(prom_memory_limit), 0x1000000);
- }
-}
-
-/*
- * To tell the firmware what our capabilities are, we have to pass
- * it a fake 32-bit ELF header containing a couple of PT_NOTE sections
- * that contain structures that contain the actual values.
- */
-static struct fake_elf {
- Elf32_Ehdr elfhdr;
- Elf32_Phdr phdr[2];
- struct chrpnote {
- u32 namesz;
- u32 descsz;
- u32 type;
- char name[8]; /* "PowerPC" */
- struct chrpdesc {
- u32 real_mode;
- u32 real_base;
- u32 real_size;
- u32 virt_base;
- u32 virt_size;
- u32 load_base;
- } chrpdesc;
- } chrpnote;
- struct rpanote {
- u32 namesz;
- u32 descsz;
- u32 type;
- char name[24]; /* "IBM,RPA-Client-Config" */
- struct rpadesc {
- u32 lpar_affinity;
- u32 min_rmo_size;
- u32 min_rmo_percent;
- u32 max_pft_size;
- u32 splpar;
- u32 min_load;
- u32 new_mem_def;
- u32 ignore_me;
- } rpadesc;
- } rpanote;
-} fake_elf = {
- .elfhdr = {
- .e_ident = { 0x7f, 'E', 'L', 'F',
- ELFCLASS32, ELFDATA2MSB, EV_CURRENT },
- .e_type = ET_EXEC, /* yeah right */
- .e_machine = EM_PPC,
- .e_version = EV_CURRENT,
- .e_phoff = offsetof(struct fake_elf, phdr),
- .e_phentsize = sizeof(Elf32_Phdr),
- .e_phnum = 2
- },
- .phdr = {
- [0] = {
- .p_type = PT_NOTE,
- .p_offset = offsetof(struct fake_elf, chrpnote),
- .p_filesz = sizeof(struct chrpnote)
- }, [1] = {
- .p_type = PT_NOTE,
- .p_offset = offsetof(struct fake_elf, rpanote),
- .p_filesz = sizeof(struct rpanote)
- }
- },
- .chrpnote = {
- .namesz = sizeof("PowerPC"),
- .descsz = sizeof(struct chrpdesc),
- .type = 0x1275,
- .name = "PowerPC",
- .chrpdesc = {
- .real_mode = ~0U, /* ~0 means "don't care" */
- .real_base = ~0U,
- .real_size = ~0U,
- .virt_base = ~0U,
- .virt_size = ~0U,
- .load_base = ~0U
- },
- },
- .rpanote = {
- .namesz = sizeof("IBM,RPA-Client-Config"),
- .descsz = sizeof(struct rpadesc),
- .type = 0x12759999,
- .name = "IBM,RPA-Client-Config",
- .rpadesc = {
- .lpar_affinity = 0,
- .min_rmo_size = 64, /* in megabytes */
- .min_rmo_percent = 0,
- .max_pft_size = 48, /* 2^48 bytes max PFT size */
- .splpar = 1,
- .min_load = ~0U,
- .new_mem_def = 0
- }
- }
-};
-
-static void __init prom_send_capabilities(void)
-{
- unsigned long offset = reloc_offset();
- ihandle elfloader;
-
- elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader"));
- if (elfloader == 0) {
- prom_printf("couldn't open /packages/elf-loader\n");
- return;
- }
- call_prom("call-method", 3, 1, ADDR("process-elf-header"),
- elfloader, ADDR(&fake_elf));
- call_prom("close", 1, 0, elfloader);
-}
-
-/*
- * Memory allocation strategy... our layout is normally:
- *
- * at 14Mb or more we vmlinux, then a gap and initrd. In some rare cases, initrd
- * might end up beeing before the kernel though. We assume this won't override
- * the final kernel at 0, we have no provision to handle that in this version,
- * but it should hopefully never happen.
- *
- * alloc_top is set to the top of RMO, eventually shrink down if the TCEs overlap
- * alloc_bottom is set to the top of kernel/initrd
- *
- * from there, allocations are done that way : rtas is allocated topmost, and
- * the device-tree is allocated from the bottom. We try to grow the device-tree
- * allocation as we progress. If we can't, then we fail, we don't currently have
- * a facility to restart elsewhere, but that shouldn't be necessary neither
- *
- * Note that calls to reserve_mem have to be done explicitely, memory allocated
- * with either alloc_up or alloc_down isn't automatically reserved.
- */
-
-
-/*
- * Allocates memory in the RMO upward from the kernel/initrd
- *
- * When align is 0, this is a special case, it means to allocate in place
- * at the current location of alloc_bottom or fail (that is basically
- * extending the previous allocation). Used for the device-tree flattening
- */
-static unsigned long __init alloc_up(unsigned long size, unsigned long align)
-{
- unsigned long offset = reloc_offset();
- unsigned long base = _ALIGN_UP(RELOC(alloc_bottom), align);
- unsigned long addr = 0;
-
- prom_debug("alloc_up(%x, %x)\n", size, align);
- if (RELOC(ram_top) == 0)
- prom_panic("alloc_up() called with mem not initialized\n");
-
- if (align)
- base = _ALIGN_UP(RELOC(alloc_bottom), align);
- else
- base = RELOC(alloc_bottom);
-
- for(; (base + size) <= RELOC(alloc_top);
- base = _ALIGN_UP(base + 0x100000, align)) {
- prom_debug(" trying: 0x%x\n\r", base);
- addr = (unsigned long)prom_claim(base, size, 0);
- if (addr != PROM_ERROR)
- break;
- addr = 0;
- if (align == 0)
- break;
- }
- if (addr == 0)
- return 0;
- RELOC(alloc_bottom) = addr;
-
- prom_debug(" -> %x\n", addr);
- prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom));
- prom_debug(" alloc_top : %x\n", RELOC(alloc_top));
- prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
- prom_debug(" rmo_top : %x\n", RELOC(rmo_top));
- prom_debug(" ram_top : %x\n", RELOC(ram_top));
-
- return addr;
-}
-
-/*
- * Allocates memory downard, either from top of RMO, or if highmem
- * is set, from the top of RAM. Note that this one doesn't handle
- * failures. In does claim memory if highmem is not set.
- */
-static unsigned long __init alloc_down(unsigned long size, unsigned long align,
- int highmem)
-{
- unsigned long offset = reloc_offset();
- unsigned long base, addr = 0;
-
- prom_debug("alloc_down(%x, %x, %s)\n", size, align,
- highmem ? RELOC("(high)") : RELOC("(low)"));
- if (RELOC(ram_top) == 0)
- prom_panic("alloc_down() called with mem not initialized\n");
-
- if (highmem) {
- /* Carve out storage for the TCE table. */
- addr = _ALIGN_DOWN(RELOC(alloc_top_high) - size, align);
- if (addr <= RELOC(alloc_bottom))
- return 0;
- else {
- /* Will we bump into the RMO ? If yes, check out that we
- * didn't overlap existing allocations there, if we did,
- * we are dead, we must be the first in town !
- */
- if (addr < RELOC(rmo_top)) {
- /* Good, we are first */
- if (RELOC(alloc_top) == RELOC(rmo_top))
- RELOC(alloc_top) = RELOC(rmo_top) = addr;
- else
- return 0;
- }
- RELOC(alloc_top_high) = addr;
- }
- goto bail;
- }
-
- base = _ALIGN_DOWN(RELOC(alloc_top) - size, align);
- for(; base > RELOC(alloc_bottom); base = _ALIGN_DOWN(base - 0x100000, align)) {
- prom_debug(" trying: 0x%x\n\r", base);
- addr = (unsigned long)prom_claim(base, size, 0);
- if (addr != PROM_ERROR)
- break;
- addr = 0;
- }
- if (addr == 0)
- return 0;
- RELOC(alloc_top) = addr;
-
- bail:
- prom_debug(" -> %x\n", addr);
- prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom));
- prom_debug(" alloc_top : %x\n", RELOC(alloc_top));
- prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
- prom_debug(" rmo_top : %x\n", RELOC(rmo_top));
- prom_debug(" ram_top : %x\n", RELOC(ram_top));
-
- return addr;
-}
-
-/*
- * Parse a "reg" cell
- */
-static unsigned long __init prom_next_cell(int s, cell_t **cellp)
-{
- cell_t *p = *cellp;
- unsigned long r = 0;
-
- /* Ignore more than 2 cells */
- while (s > 2) {
- p++;
- s--;
- }
- while (s) {
- r <<= 32;
- r |= *(p++);
- s--;
- }
-
- *cellp = p;
- return r;
-}
-
-/*
- * Very dumb function for adding to the memory reserve list, but
- * we don't need anything smarter at this point
- *
- * XXX Eventually check for collisions. They should NEVER happen
- * if problems seem to show up, it would be a good start to track
- * them down.
- */
-static void reserve_mem(unsigned long base, unsigned long size)
-{
- unsigned long offset = reloc_offset();
- unsigned long top = base + size;
- unsigned long cnt = RELOC(mem_reserve_cnt);
-
- if (size == 0)
- return;
-
- /* We need to always keep one empty entry so that we
- * have our terminator with "size" set to 0 since we are
- * dumb and just copy this entire array to the boot params
- */
- base = _ALIGN_DOWN(base, PAGE_SIZE);
- top = _ALIGN_UP(top, PAGE_SIZE);
- size = top - base;
-
- if (cnt >= (MEM_RESERVE_MAP_SIZE - 1))
- prom_panic("Memory reserve map exhausted !\n");
- RELOC(mem_reserve_map)[cnt].base = base;
- RELOC(mem_reserve_map)[cnt].size = size;
- RELOC(mem_reserve_cnt) = cnt + 1;
-}
-
-/*
- * Initialize memory allocation mecanism, parse "memory" nodes and
- * obtain that way the top of memory and RMO to setup out local allocator
- */
-static void __init prom_init_mem(void)
-{
- phandle node;
- char *path, type[64];
- unsigned int plen;
- cell_t *p, *endp;
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
-
- /*
- * We iterate the memory nodes to find
- * 1) top of RMO (first node)
- * 2) top of memory
- */
- prom_debug("root_addr_cells: %x\n", (long)_prom->root_addr_cells);
- prom_debug("root_size_cells: %x\n", (long)_prom->root_size_cells);
-
- prom_debug("scanning memory:\n");
- path = RELOC(prom_scratch);
-
- for (node = 0; prom_next_node(&node); ) {
- type[0] = 0;
- prom_getprop(node, "device_type", type, sizeof(type));
-
- if (strcmp(type, RELOC("memory")))
- continue;
-
- plen = prom_getprop(node, "reg", RELOC(regbuf), sizeof(regbuf));
- if (plen > sizeof(regbuf)) {
- prom_printf("memory node too large for buffer !\n");
- plen = sizeof(regbuf);
- }
- p = RELOC(regbuf);
- endp = p + (plen / sizeof(cell_t));
-
-#ifdef DEBUG_PROM
- memset(path, 0, PROM_SCRATCH_SIZE);
- call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
- prom_debug(" node %s :\n", path);
-#endif /* DEBUG_PROM */
-
- while ((endp - p) >= (_prom->root_addr_cells + _prom->root_size_cells)) {
- unsigned long base, size;
-
- base = prom_next_cell(_prom->root_addr_cells, &p);
- size = prom_next_cell(_prom->root_size_cells, &p);
-
- if (size == 0)
- continue;
- prom_debug(" %x %x\n", base, size);
- if (base == 0)
- RELOC(rmo_top) = size;
- if ((base + size) > RELOC(ram_top))
- RELOC(ram_top) = base + size;
- }
- }
-
- RELOC(alloc_bottom) = PAGE_ALIGN(RELOC(klimit) - offset + 0x4000);
-
- /* Check if we have an initrd after the kernel, if we do move our bottom
- * point to after it
- */
- if (RELOC(prom_initrd_start)) {
- if (RELOC(prom_initrd_end) > RELOC(alloc_bottom))
- RELOC(alloc_bottom) = PAGE_ALIGN(RELOC(prom_initrd_end));
- }
-
- /*
- * If prom_memory_limit is set we reduce the upper limits *except* for
- * alloc_top_high. This must be the real top of RAM so we can put
- * TCE's up there.
- */
-
- RELOC(alloc_top_high) = RELOC(ram_top);
-
- if (RELOC(prom_memory_limit)) {
- if (RELOC(prom_memory_limit) <= RELOC(alloc_bottom)) {
- prom_printf("Ignoring mem=%x <= alloc_bottom.\n",
- RELOC(prom_memory_limit));
- RELOC(prom_memory_limit) = 0;
- } else if (RELOC(prom_memory_limit) >= RELOC(ram_top)) {
- prom_printf("Ignoring mem=%x >= ram_top.\n",
- RELOC(prom_memory_limit));
- RELOC(prom_memory_limit) = 0;
- } else {
- RELOC(ram_top) = RELOC(prom_memory_limit);
- RELOC(rmo_top) = min(RELOC(rmo_top), RELOC(prom_memory_limit));
- }
- }
-
- /*
- * Setup our top alloc point, that is top of RMO or top of
- * segment 0 when running non-LPAR.
- */
- if ( RELOC(of_platform) == PLATFORM_PSERIES_LPAR )
- RELOC(alloc_top) = RELOC(rmo_top);
- else
- /* Some RS64 machines have buggy firmware where claims up at 1GB
- * fails. Cap at 768MB as a workaround. Still plenty of room.
- */
- RELOC(alloc_top) = RELOC(rmo_top) = min(0x30000000ul, RELOC(ram_top));
-
- prom_printf("memory layout at init:\n");
- prom_printf(" memory_limit : %x (16 MB aligned)\n", RELOC(prom_memory_limit));
- prom_printf(" alloc_bottom : %x\n", RELOC(alloc_bottom));
- prom_printf(" alloc_top : %x\n", RELOC(alloc_top));
- prom_printf(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
- prom_printf(" rmo_top : %x\n", RELOC(rmo_top));
- prom_printf(" ram_top : %x\n", RELOC(ram_top));
-}
-
-
-/*
- * Allocate room for and instanciate RTAS
- */
-static void __init prom_instantiate_rtas(void)
-{
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
- phandle rtas_node;
- ihandle rtas_inst;
- u32 base, entry = 0;
- u32 size = 0;
-
- prom_debug("prom_instantiate_rtas: start...\n");
-
- rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
- prom_debug("rtas_node: %x\n", rtas_node);
- if (!PHANDLE_VALID(rtas_node))
- return;
-
- prom_getprop(rtas_node, "rtas-size", &size, sizeof(size));
- if (size == 0)
- return;
-
- base = alloc_down(size, PAGE_SIZE, 0);
- if (base == 0) {
- prom_printf("RTAS allocation failed !\n");
- return;
- }
-
- rtas_inst = call_prom("open", 1, 1, ADDR("/rtas"));
- if (!IHANDLE_VALID(rtas_inst)) {
- prom_printf("opening rtas package failed");
- return;
- }
-
- prom_printf("instantiating rtas at 0x%x ...", base);
-
- if (call_prom("call-method", 3, 2,
- ADDR("instantiate-rtas"),
- rtas_inst, base) != PROM_ERROR) {
- entry = (long)_prom->args.rets[1];
- }
- if (entry == 0) {
- prom_printf(" failed\n");
- return;
- }
- prom_printf(" done\n");
-
- reserve_mem(base, size);
-
- prom_setprop(rtas_node, "linux,rtas-base", &base, sizeof(base));
- prom_setprop(rtas_node, "linux,rtas-entry", &entry, sizeof(entry));
-
- prom_debug("rtas base = 0x%x\n", base);
- prom_debug("rtas entry = 0x%x\n", entry);
- prom_debug("rtas size = 0x%x\n", (long)size);
-
- prom_debug("prom_instantiate_rtas: end...\n");
-}
-
-
-/*
- * Allocate room for and initialize TCE tables
- */
-static void __init prom_initialize_tce_table(void)
-{
- phandle node;
- ihandle phb_node;
- unsigned long offset = reloc_offset();
- char compatible[64], type[64], model[64];
- char *path = RELOC(prom_scratch);
- u64 base, align;
- u32 minalign, minsize;
- u64 tce_entry, *tce_entryp;
- u64 local_alloc_top, local_alloc_bottom;
- u64 i;
-
- if (RELOC(ppc64_iommu_off))
- return;
-
- prom_debug("starting prom_initialize_tce_table\n");
-
- /* Cache current top of allocs so we reserve a single block */
- local_alloc_top = RELOC(alloc_top_high);
- local_alloc_bottom = local_alloc_top;
-
- /* Search all nodes looking for PHBs. */
- for (node = 0; prom_next_node(&node); ) {
- compatible[0] = 0;
- type[0] = 0;
- model[0] = 0;
- prom_getprop(node, "compatible",
- compatible, sizeof(compatible));
- prom_getprop(node, "device_type", type, sizeof(type));
- prom_getprop(node, "model", model, sizeof(model));
-
- if ((type[0] == 0) || (strstr(type, RELOC("pci")) == NULL))
- continue;
-
- /* Keep the old logic in tack to avoid regression. */
- if (compatible[0] != 0) {
- if ((strstr(compatible, RELOC("python")) == NULL) &&
- (strstr(compatible, RELOC("Speedwagon")) == NULL) &&
- (strstr(compatible, RELOC("Winnipeg")) == NULL))
- continue;
- } else if (model[0] != 0) {
- if ((strstr(model, RELOC("ython")) == NULL) &&
- (strstr(model, RELOC("peedwagon")) == NULL) &&
- (strstr(model, RELOC("innipeg")) == NULL))
- continue;
- }
-
- if (prom_getprop(node, "tce-table-minalign", &minalign,
- sizeof(minalign)) == PROM_ERROR)
- minalign = 0;
- if (prom_getprop(node, "tce-table-minsize", &minsize,
- sizeof(minsize)) == PROM_ERROR)
- minsize = 4UL << 20;
-
- /*
- * Even though we read what OF wants, we just set the table
- * size to 4 MB. This is enough to map 2GB of PCI DMA space.
- * By doing this, we avoid the pitfalls of trying to DMA to
- * MMIO space and the DMA alias hole.
- *
- * On POWER4, firmware sets the TCE region by assuming
- * each TCE table is 8MB. Using this memory for anything
- * else will impact performance, so we always allocate 8MB.
- * Anton
- */
- if (__is_processor(PV_POWER4) || __is_processor(PV_POWER4p))
- minsize = 8UL << 20;
- else
- minsize = 4UL << 20;
-
- /* Align to the greater of the align or size */
- align = max(minalign, minsize);
- base = alloc_down(minsize, align, 1);
- if (base == 0)
- prom_panic("ERROR, cannot find space for TCE table.\n");
- if (base < local_alloc_bottom)
- local_alloc_bottom = base;
-
- /* Save away the TCE table attributes for later use. */
- prom_setprop(node, "linux,tce-base", &base, sizeof(base));
- prom_setprop(node, "linux,tce-size", &minsize, sizeof(minsize));
-
- /* It seems OF doesn't null-terminate the path :-( */
- memset(path, 0, sizeof(path));
- /* Call OF to setup the TCE hardware */
- if (call_prom("package-to-path", 3, 1, node,
- path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) {
- prom_printf("package-to-path failed\n");
- }
-
- prom_debug("TCE table: %s\n", path);
- prom_debug("\tnode = 0x%x\n", node);
- prom_debug("\tbase = 0x%x\n", base);
- prom_debug("\tsize = 0x%x\n", minsize);
-
- /* Initialize the table to have a one-to-one mapping
- * over the allocated size.
- */
- tce_entryp = (unsigned long *)base;
- for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) {
- tce_entry = (i << PAGE_SHIFT);
- tce_entry |= 0x3;
- *tce_entryp = tce_entry;
- }
-
- prom_printf("opening PHB %s", path);
- phb_node = call_prom("open", 1, 1, path);
- if (phb_node == 0)
- prom_printf("... failed\n");
- else
- prom_printf("... done\n");
-
- call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"),
- phb_node, -1, minsize,
- (u32) base, (u32) (base >> 32));
- call_prom("close", 1, 0, phb_node);
- }
-
- reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom);
-
- if (RELOC(prom_memory_limit)) {
- /*
- * We align the start to a 16MB boundary so we can map the TCE area
- * using large pages if possible. The end should be the top of RAM
- * so no need to align it.
- */
- RELOC(prom_tce_alloc_start) = _ALIGN_DOWN(local_alloc_bottom, 0x1000000);
- RELOC(prom_tce_alloc_end) = local_alloc_top;
- }
-
- /* Flag the first invalid entry */
- prom_debug("ending prom_initialize_tce_table\n");
-}
-
-/*
- * With CHRP SMP we need to use the OF to start the other
- * processors so we can't wait until smp_boot_cpus (the OF is
- * trashed by then) so we have to put the processors into
- * a holding pattern controlled by the kernel (not OF) before
- * we destroy the OF.
- *
- * This uses a chunk of low memory, puts some holding pattern
- * code there and sends the other processors off to there until
- * smp_boot_cpus tells them to do something. The holding pattern
- * checks that address until its cpu # is there, when it is that
- * cpu jumps to __secondary_start(). smp_boot_cpus() takes care
- * of setting those values.
- *
- * We also use physical address 0x4 here to tell when a cpu
- * is in its holding pattern code.
- *
- * Fixup comment... DRENG / PPPBBB - Peter
- *
- * -- Cort
- */
-static void __init prom_hold_cpus(void)
-{
- unsigned long i;
- unsigned int reg;
- phandle node;
- unsigned long offset = reloc_offset();
- char type[64];
- int cpuid = 0;
- unsigned int interrupt_server[MAX_CPU_THREADS];
- unsigned int cpu_threads, hw_cpu_num;
- int propsize;
- extern void __secondary_hold(void);
- extern unsigned long __secondary_hold_spinloop;
- extern unsigned long __secondary_hold_acknowledge;
- unsigned long *spinloop
- = (void *)virt_to_abs(&__secondary_hold_spinloop);
- unsigned long *acknowledge
- = (void *)virt_to_abs(&__secondary_hold_acknowledge);
- unsigned long secondary_hold
- = virt_to_abs(*PTRRELOC((unsigned long *)__secondary_hold));
- struct prom_t *_prom = PTRRELOC(&prom);
-
- prom_debug("prom_hold_cpus: start...\n");
- prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop);
- prom_debug(" 1) *spinloop = 0x%x\n", *spinloop);
- prom_debug(" 1) acknowledge = 0x%x\n",
- (unsigned long)acknowledge);
- prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge);
- prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold);
-
- /* Set the common spinloop variable, so all of the secondary cpus
- * will block when they are awakened from their OF spinloop.
- * This must occur for both SMP and non SMP kernels, since OF will
- * be trashed when we move the kernel.
- */
- *spinloop = 0;
-
-#ifdef CONFIG_HMT
- for (i=0; i < NR_CPUS; i++) {
- RELOC(hmt_thread_data)[i].pir = 0xdeadbeef;
- }
-#endif
- /* look for cpus */
- for (node = 0; prom_next_node(&node); ) {
- type[0] = 0;
- prom_getprop(node, "device_type", type, sizeof(type));
- if (strcmp(type, RELOC("cpu")) != 0)
- continue;
-
- /* Skip non-configured cpus. */
- if (prom_getprop(node, "status", type, sizeof(type)) > 0)
- if (strcmp(type, RELOC("okay")) != 0)
- continue;
-
- reg = -1;
- prom_getprop(node, "reg", &reg, sizeof(reg));
-
- prom_debug("\ncpuid = 0x%x\n", cpuid);
- prom_debug("cpu hw idx = 0x%x\n", reg);
-
- /* Init the acknowledge var which will be reset by
- * the secondary cpu when it awakens from its OF
- * spinloop.
- */
- *acknowledge = (unsigned long)-1;
-
- propsize = prom_getprop(node, "ibm,ppc-interrupt-server#s",
- &interrupt_server,
- sizeof(interrupt_server));
- if (propsize < 0) {
- /* no property. old hardware has no SMT */
- cpu_threads = 1;
- interrupt_server[0] = reg; /* fake it with phys id */
- } else {
- /* We have a threaded processor */
- cpu_threads = propsize / sizeof(u32);
- if (cpu_threads > MAX_CPU_THREADS) {
- prom_printf("SMT: too many threads!\n"
- "SMT: found %x, max is %x\n",
- cpu_threads, MAX_CPU_THREADS);
- cpu_threads = 1; /* ToDo: panic? */
- }
- }
-
- hw_cpu_num = interrupt_server[0];
- if (hw_cpu_num != _prom->cpu) {
- /* Primary Thread of non-boot cpu */
- prom_printf("%x : starting cpu hw idx %x... ", cpuid, reg);
- call_prom("start-cpu", 3, 0, node,
- secondary_hold, reg);
-
- for ( i = 0 ; (i < 100000000) &&
- (*acknowledge == ((unsigned long)-1)); i++ )
- mb();
-
- if (*acknowledge == reg) {
- prom_printf("done\n");
- /* We have to get every CPU out of OF,
- * even if we never start it. */
- if (cpuid >= NR_CPUS)
- goto next;
- } else {
- prom_printf("failed: %x\n", *acknowledge);
- }
- }
-#ifdef CONFIG_SMP
- else
- prom_printf("%x : boot cpu %x\n", cpuid, reg);
-#endif
-next:
-#ifdef CONFIG_SMP
- /* Init paca for secondary threads. They start later. */
- for (i=1; i < cpu_threads; i++) {
- cpuid++;
- if (cpuid >= NR_CPUS)
- continue;
- }
-#endif /* CONFIG_SMP */
- cpuid++;
- }
-#ifdef CONFIG_HMT
- /* Only enable HMT on processors that provide support. */
- if (__is_processor(PV_PULSAR) ||
- __is_processor(PV_ICESTAR) ||
- __is_processor(PV_SSTAR)) {
- prom_printf(" starting secondary threads\n");
-
- for (i = 0; i < NR_CPUS; i += 2) {
- if (!cpu_online(i))
- continue;
-
- if (i == 0) {
- unsigned long pir = mfspr(SPRN_PIR);
- if (__is_processor(PV_PULSAR)) {
- RELOC(hmt_thread_data)[i].pir =
- pir & 0x1f;
- } else {
- RELOC(hmt_thread_data)[i].pir =
- pir & 0x3ff;
- }
- }
- }
- } else {
- prom_printf("Processor is not HMT capable\n");
- }
-#endif
-
- if (cpuid > NR_CPUS)
- prom_printf("WARNING: maximum CPUs (" __stringify(NR_CPUS)
- ") exceeded: ignoring extras\n");
-
- prom_debug("prom_hold_cpus: end...\n");
-}
-
-
-static void __init prom_init_client_services(unsigned long pp)
-{
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
-
- /* Get a handle to the prom entry point before anything else */
- _prom->entry = pp;
-
- /* Init default value for phys size */
- _prom->root_size_cells = 1;
- _prom->root_addr_cells = 2;
-
- /* get a handle for the stdout device */
- _prom->chosen = call_prom("finddevice", 1, 1, ADDR("/chosen"));
- if (!PHANDLE_VALID(_prom->chosen))
- prom_panic("cannot find chosen"); /* msg won't be printed :( */
-
- /* get device tree root */
- _prom->root = call_prom("finddevice", 1, 1, ADDR("/"));
- if (!PHANDLE_VALID(_prom->root))
- prom_panic("cannot find device tree root"); /* msg won't be printed :( */
-}
-
-static void __init prom_init_stdout(void)
-{
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
- char *path = RELOC(of_stdout_device);
- char type[16];
- u32 val;
-
- if (prom_getprop(_prom->chosen, "stdout", &val, sizeof(val)) <= 0)
- prom_panic("cannot find stdout");
-
- _prom->stdout = val;
-
- /* Get the full OF pathname of the stdout device */
- memset(path, 0, 256);
- call_prom("instance-to-path", 3, 1, _prom->stdout, path, 255);
- val = call_prom("instance-to-package", 1, 1, _prom->stdout);
- prom_setprop(_prom->chosen, "linux,stdout-package", &val, sizeof(val));
- prom_printf("OF stdout device is: %s\n", RELOC(of_stdout_device));
- prom_setprop(_prom->chosen, "linux,stdout-path",
- RELOC(of_stdout_device), strlen(RELOC(of_stdout_device))+1);
-
- /* If it's a display, note it */
- memset(type, 0, sizeof(type));
- prom_getprop(val, "device_type", type, sizeof(type));
- if (strcmp(type, RELOC("display")) == 0) {
- _prom->disp_node = val;
- prom_setprop(val, "linux,boot-display", NULL, 0);
- }
-}
-
-static void __init prom_close_stdin(void)
-{
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
- ihandle val;
-
- if (prom_getprop(_prom->chosen, "stdin", &val, sizeof(val)) > 0)
- call_prom("close", 1, 0, val);
-}
-
-static int __init prom_find_machine_type(void)
-{
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
- char compat[256];
- int len, i = 0;
- phandle rtas;
-
- len = prom_getprop(_prom->root, "compatible",
- compat, sizeof(compat)-1);
- if (len > 0) {
- compat[len] = 0;
- while (i < len) {
- char *p = &compat[i];
- int sl = strlen(p);
- if (sl == 0)
- break;
- if (strstr(p, RELOC("Power Macintosh")) ||
- strstr(p, RELOC("MacRISC4")))
- return PLATFORM_POWERMAC;
- if (strstr(p, RELOC("Momentum,Maple")))
- return PLATFORM_MAPLE;
- i += sl + 1;
- }
- }
- /* Default to pSeries. We need to know if we are running LPAR */
- rtas = call_prom("finddevice", 1, 1, ADDR("/rtas"));
- if (PHANDLE_VALID(rtas)) {
- int x = prom_getproplen(rtas, "ibm,hypertas-functions");
- if (x != PROM_ERROR) {
- prom_printf("Hypertas detected, assuming LPAR !\n");
- return PLATFORM_PSERIES_LPAR;
- }
- }
- return PLATFORM_PSERIES;
-}
-
-static int __init prom_set_color(ihandle ih, int i, int r, int g, int b)
-{
- unsigned long offset = reloc_offset();
-
- return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r);
-}
-
-/*
- * If we have a display that we don't know how to drive,
- * we will want to try to execute OF's open method for it
- * later. However, OF will probably fall over if we do that
- * we've taken over the MMU.
- * So we check whether we will need to open the display,
- * and if so, open it now.
- */
-static void __init prom_check_displays(void)
-{
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
- char type[16], *path;
- phandle node;
- ihandle ih;
- int i;
-
- static unsigned char default_colors[] = {
- 0x00, 0x00, 0x00,
- 0x00, 0x00, 0xaa,
- 0x00, 0xaa, 0x00,
- 0x00, 0xaa, 0xaa,
- 0xaa, 0x00, 0x00,
- 0xaa, 0x00, 0xaa,
- 0xaa, 0xaa, 0x00,
- 0xaa, 0xaa, 0xaa,
- 0x55, 0x55, 0x55,
- 0x55, 0x55, 0xff,
- 0x55, 0xff, 0x55,
- 0x55, 0xff, 0xff,
- 0xff, 0x55, 0x55,
- 0xff, 0x55, 0xff,
- 0xff, 0xff, 0x55,
- 0xff, 0xff, 0xff
- };
- const unsigned char *clut;
-
- prom_printf("Looking for displays\n");
- for (node = 0; prom_next_node(&node); ) {
- memset(type, 0, sizeof(type));
- prom_getprop(node, "device_type", type, sizeof(type));
- if (strcmp(type, RELOC("display")) != 0)
- continue;
-
- /* It seems OF doesn't null-terminate the path :-( */
- path = RELOC(prom_scratch);
- memset(path, 0, PROM_SCRATCH_SIZE);
-
- /*
- * leave some room at the end of the path for appending extra
- * arguments
- */
- if (call_prom("package-to-path", 3, 1, node, path,
- PROM_SCRATCH_SIZE-10) == PROM_ERROR)
- continue;
- prom_printf("found display : %s, opening ... ", path);
-
- ih = call_prom("open", 1, 1, path);
- if (ih == 0) {
- prom_printf("failed\n");
- continue;
- }
-
- /* Success */
- prom_printf("done\n");
- prom_setprop(node, "linux,opened", NULL, 0);
-
- /*
- * stdout wasn't a display node, pick the first we can find
- * for btext
- */
- if (_prom->disp_node == 0)
- _prom->disp_node = node;
-
- /* Setup a useable color table when the appropriate
- * method is available. Should update this to set-colors */
- clut = RELOC(default_colors);
- for (i = 0; i < 32; i++, clut += 3)
- if (prom_set_color(ih, i, clut[0], clut[1],
- clut[2]) != 0)
- break;
-
-#ifdef CONFIG_LOGO_LINUX_CLUT224
- clut = PTRRELOC(RELOC(logo_linux_clut224.clut));
- for (i = 0; i < RELOC(logo_linux_clut224.clutsize); i++, clut += 3)
- if (prom_set_color(ih, i + 32, clut[0], clut[1],
- clut[2]) != 0)
- break;
-#endif /* CONFIG_LOGO_LINUX_CLUT224 */
- }
-}
-
-
-/* Return (relocated) pointer to this much memory: moves initrd if reqd. */
-static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end,
- unsigned long needed, unsigned long align)
-{
- unsigned long offset = reloc_offset();
- void *ret;
-
- *mem_start = _ALIGN(*mem_start, align);
- while ((*mem_start + needed) > *mem_end) {
- unsigned long room, chunk;
-
- prom_debug("Chunk exhausted, claiming more at %x...\n",
- RELOC(alloc_bottom));
- room = RELOC(alloc_top) - RELOC(alloc_bottom);
- if (room > DEVTREE_CHUNK_SIZE)
- room = DEVTREE_CHUNK_SIZE;
- if (room < PAGE_SIZE)
- prom_panic("No memory for flatten_device_tree (no room)");
- chunk = alloc_up(room, 0);
- if (chunk == 0)
- prom_panic("No memory for flatten_device_tree (claim failed)");
- *mem_end = RELOC(alloc_top);
- }
-
- ret = (void *)*mem_start;
- *mem_start += needed;
-
- return ret;
-}
-
-#define dt_push_token(token, mem_start, mem_end) \
- do { *((u32 *)make_room(mem_start, mem_end, 4, 4)) = token; } while(0)
-
-static unsigned long __init dt_find_string(char *str)
-{
- unsigned long offset = reloc_offset();
- char *s, *os;
-
- s = os = (char *)RELOC(dt_string_start);
- s += 4;
- while (s < (char *)RELOC(dt_string_end)) {
- if (strcmp(s, str) == 0)
- return s - os;
- s += strlen(s) + 1;
- }
- return 0;
-}
-
-/*
- * The Open Firmware 1275 specification states properties must be 31 bytes or
- * less, however not all firmwares obey this. Make it 64 bytes to be safe.
- */
-#define MAX_PROPERTY_NAME 64
-
-static void __init scan_dt_build_strings(phandle node,
- unsigned long *mem_start,
- unsigned long *mem_end)
-{
- unsigned long offset = reloc_offset();
- char *prev_name, *namep, *sstart;
- unsigned long soff;
- phandle child;
-
- sstart = (char *)RELOC(dt_string_start);
-
- /* get and store all property names */
- prev_name = RELOC("");
- for (;;) {
- /* 64 is max len of name including nul. */
- namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1);
- if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) {
- /* No more nodes: unwind alloc */
- *mem_start = (unsigned long)namep;
- break;
- }
-
- /* skip "name" */
- if (strcmp(namep, RELOC("name")) == 0) {
- *mem_start = (unsigned long)namep;
- prev_name = RELOC("name");
- continue;
- }
- /* get/create string entry */
- soff = dt_find_string(namep);
- if (soff != 0) {
- *mem_start = (unsigned long)namep;
- namep = sstart + soff;
- } else {
- /* Trim off some if we can */
- *mem_start = (unsigned long)namep + strlen(namep) + 1;
- RELOC(dt_string_end) = *mem_start;
- }
- prev_name = namep;
- }
-
- /* do all our children */
- child = call_prom("child", 1, 1, node);
- while (child != 0) {
- scan_dt_build_strings(child, mem_start, mem_end);
- child = call_prom("peer", 1, 1, child);
- }
-}
-
-static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
- unsigned long *mem_end)
-{
- phandle child;
- char *namep, *prev_name, *sstart, *p, *ep, *lp, *path;
- unsigned long soff;
- unsigned char *valp;
- unsigned long offset = reloc_offset();
- static char pname[MAX_PROPERTY_NAME];
- int l;
-
- dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
-
- /* get the node's full name */
- namep = (char *)*mem_start;
- l = call_prom("package-to-path", 3, 1, node,
- namep, *mem_end - *mem_start);
- if (l >= 0) {
- /* Didn't fit? Get more room. */
- if ((l+1) > (*mem_end - *mem_start)) {
- namep = make_room(mem_start, mem_end, l+1, 1);
- call_prom("package-to-path", 3, 1, node, namep, l);
- }
- namep[l] = '\0';
-
- /* Fixup an Apple bug where they have bogus \0 chars in the
- * middle of the path in some properties
- */
- for (p = namep, ep = namep + l; p < ep; p++)
- if (*p == '\0') {
- memmove(p, p+1, ep - p);
- ep--; l--; p--;
- }
-
- /* now try to extract the unit name in that mess */
- for (p = namep, lp = NULL; *p; p++)
- if (*p == '/')
- lp = p + 1;
- if (lp != NULL)
- memmove(namep, lp, strlen(lp) + 1);
- *mem_start = _ALIGN(((unsigned long) namep) +
- strlen(namep) + 1, 4);
- }
-
- /* get it again for debugging */
- path = RELOC(prom_scratch);
- memset(path, 0, PROM_SCRATCH_SIZE);
- call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
-
- /* get and store all properties */
- prev_name = RELOC("");
- sstart = (char *)RELOC(dt_string_start);
- for (;;) {
- if (call_prom("nextprop", 3, 1, node, prev_name,
- RELOC(pname)) != 1)
- break;
-
- /* skip "name" */
- if (strcmp(RELOC(pname), RELOC("name")) == 0) {
- prev_name = RELOC("name");
- continue;
- }
-
- /* find string offset */
- soff = dt_find_string(RELOC(pname));
- if (soff == 0) {
- prom_printf("WARNING: Can't find string index for"
- " <%s>, node %s\n", RELOC(pname), path);
- break;
- }
- prev_name = sstart + soff;
-
- /* get length */
- l = call_prom("getproplen", 2, 1, node, RELOC(pname));
-
- /* sanity checks */
- if (l == PROM_ERROR)
- continue;
- if (l > MAX_PROPERTY_LENGTH) {
- prom_printf("WARNING: ignoring large property ");
- /* It seems OF doesn't null-terminate the path :-( */
- prom_printf("[%s] ", path);
- prom_printf("%s length 0x%x\n", RELOC(pname), l);
- continue;
- }
-
- /* push property head */
- dt_push_token(OF_DT_PROP, mem_start, mem_end);
- dt_push_token(l, mem_start, mem_end);
- dt_push_token(soff, mem_start, mem_end);
-
- /* push property content */
- valp = make_room(mem_start, mem_end, l, 4);
- call_prom("getprop", 4, 1, node, RELOC(pname), valp, l);
- *mem_start = _ALIGN(*mem_start, 4);
- }
-
- /* Add a "linux,phandle" property. */
- soff = dt_find_string(RELOC("linux,phandle"));
- if (soff == 0)
- prom_printf("WARNING: Can't find string index for"
- " <linux-phandle> node %s\n", path);
- else {
- dt_push_token(OF_DT_PROP, mem_start, mem_end);
- dt_push_token(4, mem_start, mem_end);
- dt_push_token(soff, mem_start, mem_end);
- valp = make_room(mem_start, mem_end, 4, 4);
- *(u32 *)valp = node;
- }
-
- /* do all our children */
- child = call_prom("child", 1, 1, node);
- while (child != 0) {
- scan_dt_build_struct(child, mem_start, mem_end);
- child = call_prom("peer", 1, 1, child);
- }
-
- dt_push_token(OF_DT_END_NODE, mem_start, mem_end);
-}
-
-static void __init flatten_device_tree(void)
-{
- phandle root;
- unsigned long offset = reloc_offset();
- unsigned long mem_start, mem_end, room;
- struct boot_param_header *hdr;
- struct prom_t *_prom = PTRRELOC(&prom);
- char *namep;
- u64 *rsvmap;
-
- /*
- * Check how much room we have between alloc top & bottom (+/- a
- * few pages), crop to 4Mb, as this is our "chuck" size
- */
- room = RELOC(alloc_top) - RELOC(alloc_bottom) - 0x4000;
- if (room > DEVTREE_CHUNK_SIZE)
- room = DEVTREE_CHUNK_SIZE;
- prom_debug("starting device tree allocs at %x\n", RELOC(alloc_bottom));
-
- /* Now try to claim that */
- mem_start = (unsigned long)alloc_up(room, PAGE_SIZE);
- if (mem_start == 0)
- prom_panic("Can't allocate initial device-tree chunk\n");
- mem_end = RELOC(alloc_top);
-
- /* Get root of tree */
- root = call_prom("peer", 1, 1, (phandle)0);
- if (root == (phandle)0)
- prom_panic ("couldn't get device tree root\n");
-
- /* Build header and make room for mem rsv map */
- mem_start = _ALIGN(mem_start, 4);
- hdr = make_room(&mem_start, &mem_end,
- sizeof(struct boot_param_header), 4);
- RELOC(dt_header_start) = (unsigned long)hdr;
- rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8);
-
- /* Start of strings */
- mem_start = PAGE_ALIGN(mem_start);
- RELOC(dt_string_start) = mem_start;
- mem_start += 4; /* hole */
-
- /* Add "linux,phandle" in there, we'll need it */
- namep = make_room(&mem_start, &mem_end, 16, 1);
- strcpy(namep, RELOC("linux,phandle"));
- mem_start = (unsigned long)namep + strlen(namep) + 1;
-
- /* Build string array */
- prom_printf("Building dt strings...\n");
- scan_dt_build_strings(root, &mem_start, &mem_end);
- RELOC(dt_string_end) = mem_start;
-
- /* Build structure */
- mem_start = PAGE_ALIGN(mem_start);
- RELOC(dt_struct_start) = mem_start;
- prom_printf("Building dt structure...\n");
- scan_dt_build_struct(root, &mem_start, &mem_end);
- dt_push_token(OF_DT_END, &mem_start, &mem_end);
- RELOC(dt_struct_end) = PAGE_ALIGN(mem_start);
-
- /* Finish header */
- hdr->boot_cpuid_phys = _prom->cpu;
- hdr->magic = OF_DT_HEADER;
- hdr->totalsize = RELOC(dt_struct_end) - RELOC(dt_header_start);
- hdr->off_dt_struct = RELOC(dt_struct_start) - RELOC(dt_header_start);
- hdr->off_dt_strings = RELOC(dt_string_start) - RELOC(dt_header_start);
- hdr->dt_strings_size = RELOC(dt_string_end) - RELOC(dt_string_start);
- hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - RELOC(dt_header_start);
- hdr->version = OF_DT_VERSION;
- /* Version 16 is not backward compatible */
- hdr->last_comp_version = 0x10;
-
- /* Reserve the whole thing and copy the reserve map in, we
- * also bump mem_reserve_cnt to cause further reservations to
- * fail since it's too late.
- */
- reserve_mem(RELOC(dt_header_start), hdr->totalsize);
- memcpy(rsvmap, RELOC(mem_reserve_map), sizeof(mem_reserve_map));
-
-#ifdef DEBUG_PROM
- {
- int i;
- prom_printf("reserved memory map:\n");
- for (i = 0; i < RELOC(mem_reserve_cnt); i++)
- prom_printf(" %x - %x\n", RELOC(mem_reserve_map)[i].base,
- RELOC(mem_reserve_map)[i].size);
- }
-#endif
- RELOC(mem_reserve_cnt) = MEM_RESERVE_MAP_SIZE;
-
- prom_printf("Device tree strings 0x%x -> 0x%x\n",
- RELOC(dt_string_start), RELOC(dt_string_end));
- prom_printf("Device tree struct 0x%x -> 0x%x\n",
- RELOC(dt_struct_start), RELOC(dt_struct_end));
-
-}
-
-
-static void __init fixup_device_tree(void)
-{
- unsigned long offset = reloc_offset();
- phandle u3, i2c, mpic;
- u32 u3_rev;
- u32 interrupts[2];
- u32 parent;
-
- /* Some G5s have a missing interrupt definition, fix it up here */
- u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
- if (!PHANDLE_VALID(u3))
- return;
- i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
- if (!PHANDLE_VALID(i2c))
- return;
- mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
- if (!PHANDLE_VALID(mpic))
- return;
-
- /* check if proper rev of u3 */
- if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev))
- == PROM_ERROR)
- return;
- if (u3_rev < 0x35 || u3_rev > 0x39)
- return;
- /* does it need fixup ? */
- if (prom_getproplen(i2c, "interrupts") > 0)
- return;
-
- prom_printf("fixing up bogus interrupts for u3 i2c...\n");
-
- /* interrupt on this revision of u3 is number 0 and level */
- interrupts[0] = 0;
- interrupts[1] = 1;
- prom_setprop(i2c, "interrupts", &interrupts, sizeof(interrupts));
- parent = (u32)mpic;
- prom_setprop(i2c, "interrupt-parent", &parent, sizeof(parent));
-}
-
-
-static void __init prom_find_boot_cpu(void)
-{
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
- u32 getprop_rval;
- ihandle prom_cpu;
- phandle cpu_pkg;
-
- if (prom_getprop(_prom->chosen, "cpu", &prom_cpu, sizeof(prom_cpu)) <= 0)
- prom_panic("cannot find boot cpu");
-
- cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu);
-
- prom_getprop(cpu_pkg, "reg", &getprop_rval, sizeof(getprop_rval));
- _prom->cpu = getprop_rval;
-
- prom_debug("Booting CPU hw index = 0x%x\n", _prom->cpu);
-}
-
-static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
-{
-#ifdef CONFIG_BLK_DEV_INITRD
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
-
- if ( r3 && r4 && r4 != 0xdeadbeef) {
- u64 val;
-
- RELOC(prom_initrd_start) = (r3 >= KERNELBASE) ? __pa(r3) : r3;
- RELOC(prom_initrd_end) = RELOC(prom_initrd_start) + r4;
-
- val = (u64)RELOC(prom_initrd_start);
- prom_setprop(_prom->chosen, "linux,initrd-start", &val, sizeof(val));
- val = (u64)RELOC(prom_initrd_end);
- prom_setprop(_prom->chosen, "linux,initrd-end", &val, sizeof(val));
-
- reserve_mem(RELOC(prom_initrd_start),
- RELOC(prom_initrd_end) - RELOC(prom_initrd_start));
-
- prom_debug("initrd_start=0x%x\n", RELOC(prom_initrd_start));
- prom_debug("initrd_end=0x%x\n", RELOC(prom_initrd_end));
- }
-#endif /* CONFIG_BLK_DEV_INITRD */
-}
-
-/*
- * We enter here early on, when the Open Firmware prom is still
- * handling exceptions and the MMU hash table for us.
- */
-
-unsigned long __init prom_init(unsigned long r3, unsigned long r4, unsigned long pp,
- unsigned long r6, unsigned long r7)
-{
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
- unsigned long phys = KERNELBASE - offset;
- u32 getprop_rval;
-
- /*
- * First zero the BSS
- */
- memset(PTRRELOC(&__bss_start), 0, __bss_stop - __bss_start);
-
- /*
- * Init interface to Open Firmware, get some node references,
- * like /chosen
- */
- prom_init_client_services(pp);
-
- /*
- * Init prom stdout device
- */
- prom_init_stdout();
- prom_debug("klimit=0x%x\n", RELOC(klimit));
- prom_debug("offset=0x%x\n", offset);
-
- /*
- * Check for an initrd
- */
- prom_check_initrd(r3, r4);
-
- /*
- * Get default machine type. At this point, we do not differenciate
- * between pSeries SMP and pSeries LPAR
- */
- RELOC(of_platform) = prom_find_machine_type();
- getprop_rval = RELOC(of_platform);
- prom_setprop(_prom->chosen, "linux,platform",
- &getprop_rval, sizeof(getprop_rval));
-
- /*
- * On pSeries, inform the firmware about our capabilities
- */
- if (RELOC(of_platform) == PLATFORM_PSERIES ||
- RELOC(of_platform) == PLATFORM_PSERIES_LPAR)
- prom_send_capabilities();
-
- /*
- * On pSeries and Cell, copy the CPU hold code
- */
- if (RELOC(of_platform) & (PLATFORM_PSERIES | PLATFORM_CELL))
- copy_and_flush(0, KERNELBASE - offset, 0x100, 0);
-
- /*
- * Get memory cells format
- */
- getprop_rval = 1;
- prom_getprop(_prom->root, "#size-cells",
- &getprop_rval, sizeof(getprop_rval));
- _prom->root_size_cells = getprop_rval;
- getprop_rval = 2;
- prom_getprop(_prom->root, "#address-cells",
- &getprop_rval, sizeof(getprop_rval));
- _prom->root_addr_cells = getprop_rval;
-
- /*
- * Do early parsing of command line
- */
- early_cmdline_parse();
-
- /*
- * Initialize memory management within prom_init
- */
- prom_init_mem();
-
- /*
- * Determine which cpu is actually running right _now_
- */
- prom_find_boot_cpu();
-
- /*
- * Initialize display devices
- */
- prom_check_displays();
-
- /*
- * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
- * that uses the allocator, we need to make sure we get the top of memory
- * available for us here...
- */
- if (RELOC(of_platform) == PLATFORM_PSERIES)
- prom_initialize_tce_table();
-
- /*
- * On non-powermacs, try to instantiate RTAS and puts all CPUs
- * in spin-loops. PowerMacs don't have a working RTAS and use
- * a different way to spin CPUs
- */
- if (RELOC(of_platform) != PLATFORM_POWERMAC) {
- prom_instantiate_rtas();
- prom_hold_cpus();
- }
-
- /*
- * Fill in some infos for use by the kernel later on
- */
- if (RELOC(ppc64_iommu_off))
- prom_setprop(_prom->chosen, "linux,iommu-off", NULL, 0);
-
- if (RELOC(iommu_force_on))
- prom_setprop(_prom->chosen, "linux,iommu-force-on", NULL, 0);
-
- if (RELOC(prom_memory_limit))
- prom_setprop(_prom->chosen, "linux,memory-limit",
- PTRRELOC(&prom_memory_limit), sizeof(RELOC(prom_memory_limit)));
-
- if (RELOC(prom_tce_alloc_start)) {
- prom_setprop(_prom->chosen, "linux,tce-alloc-start",
- PTRRELOC(&prom_tce_alloc_start), sizeof(RELOC(prom_tce_alloc_start)));
- prom_setprop(_prom->chosen, "linux,tce-alloc-end",
- PTRRELOC(&prom_tce_alloc_end), sizeof(RELOC(prom_tce_alloc_end)));
- }
-
- /*
- * Fixup any known bugs in the device-tree
- */
- fixup_device_tree();
-
- /*
- * Now finally create the flattened device-tree
- */
- prom_printf("copying OF device tree ...\n");
- flatten_device_tree();
-
- /* in case stdin is USB and still active on IBM machines... */
- prom_close_stdin();
-
- /*
- * Call OF "quiesce" method to shut down pending DMA's from
- * devices etc...
- */
- prom_printf("Calling quiesce ...\n");
- call_prom("quiesce", 0, 0);
-
- /*
- * And finally, call the kernel passing it the flattened device
- * tree and NULL as r5, thus triggering the new entry point which
- * is common to us and kexec
- */
- prom_printf("returning from prom_init\n");
- prom_debug("->dt_header_start=0x%x\n", RELOC(dt_header_start));
- prom_debug("->phys=0x%x\n", phys);
-
- __start(RELOC(dt_header_start), phys, 0);
-
- return 0;
-}
-