diff options
Diffstat (limited to 'arch/mips/ddb5xxx/common/prom.c')
| -rw-r--r-- | arch/mips/ddb5xxx/common/prom.c | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/arch/mips/ddb5xxx/common/prom.c b/arch/mips/ddb5xxx/common/prom.c deleted file mode 100644 index 54a857b5e3b..00000000000 --- a/arch/mips/ddb5xxx/common/prom.c +++ /dev/null @@ -1,132 +0,0 @@ -/* - * Copyright 2001 MontaVista Software Inc. - * Author: jsun@mvista.com or jsun@junsun.net - * - * 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. - */ -#include <linux/init.h> -#include <linux/mm.h> -#include <linux/sched.h> -#include <linux/bootmem.h> - -#include <asm/addrspace.h> -#include <asm/bootinfo.h> -#include <asm/ddb5xxx/ddb5xxx.h> -#include <asm/debug.h> - -const char *get_system_type(void) -{ - switch (mips_machtype) { - case MACH_NEC_DDB5477: return "NEC DDB Vrc-5477"; - case MACH_NEC_ROCKHOPPER: return "NEC Rockhopper"; - case MACH_NEC_ROCKHOPPERII: return "NEC RockhopperII"; - default: return "Unknown NEC board"; - } -} - -#if defined(CONFIG_DDB5477) -void ddb5477_runtime_detection(void); -#endif - -/* [jsun@junsun.net] PMON passes arguments in C main() style */ -void __init prom_init(void) -{ - int argc = fw_arg0; - char **arg = (char**) fw_arg1; - int i; - - /* if user passes kernel args, ignore the default one */ - if (argc > 1) - arcs_cmdline[0] = '\0'; - - /* arg[0] is "g", the rest is boot parameters */ - for (i = 1; i < argc; i++) { - if (strlen(arcs_cmdline) + strlen(arg[i] + 1) - >= sizeof(arcs_cmdline)) - break; - strcat(arcs_cmdline, arg[i]); - strcat(arcs_cmdline, " "); - } - - mips_machgroup = MACH_GROUP_NEC_DDB; - -#if defined(CONFIG_DDB5477) - ddb5477_runtime_detection(); - add_memory_region(0, board_ram_size, BOOT_MEM_RAM); -#endif -} - -void __init prom_free_prom_memory(void) -{ -} - -#if defined(CONFIG_DDB5477) - -#define DEFAULT_LCS1_BASE 0x19000000 -#define TESTVAL1 'K' -#define TESTVAL2 'S' - -int board_ram_size; -void ddb5477_runtime_detection(void) -{ - volatile char *test_offset; - char saved_test_byte; - - /* Determine if this is a DDB5477 board, or a BSB-VR0300 - base board. We can tell by checking for the location of - the NVRAM. It lives at the beginning of LCS1 on the DDB5477, - and the beginning of LCS1 on the BSB-VR0300 is flash memory. - The first 2K of the NVRAM are reserved, so don't we'll poke - around just after that. - */ - - /* We can only use the PCI bus to distinquish between - the Rockhopper and RockhopperII backplanes and this must - wait until ddb5477_board_init() in setup.c after the 5477 - is initialized. So, until then handle - both Rockhopper and RockhopperII backplanes as Rockhopper 1 - */ - - test_offset = (char *)KSEG1ADDR(DEFAULT_LCS1_BASE + 0x800); - saved_test_byte = *test_offset; - - *test_offset = TESTVAL1; - if (*test_offset != TESTVAL1) { - /* We couldn't set our test value, so it must not be NVRAM, - so it's a BSB_VR0300 */ - mips_machtype = MACH_NEC_ROCKHOPPER; - } else { - /* We may have gotten lucky, and the TESTVAL1 was already - stored at the test location, so we must check a second - test value */ - *test_offset = TESTVAL2; - if (*test_offset != TESTVAL2) { - /* OK, we couldn't set this value either, so it must - definately be a BSB_VR0300 */ - mips_machtype = MACH_NEC_ROCKHOPPER; - } else { - /* We could change the value twice, so it must be - NVRAM, so it's a DDB_VRC5477 */ - mips_machtype = MACH_NEC_DDB5477; - } - } - /* Restore the original byte */ - *test_offset = saved_test_byte; - - /* before we know a better way, we will trust PMON for getting - * RAM size - */ - board_ram_size = 1 << (36 - (ddb_in32(DDB_SDRAM0) & 0xf)); - - db_run(printk("DDB run-time detection : %s, %d MB RAM\n", - mips_machtype == MACH_NEC_DDB5477 ? - "DDB5477" : "Rockhopper", - board_ram_size >> 20)); - - /* we can't handle ram size > 128 MB */ - db_assert(board_ram_size <= (128 << 20)); -} -#endif |