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-rw-r--r--arch/mips/mm/Makefile1
-rw-r--r--arch/mips/mm/c-octeon.c307
-rw-r--r--arch/mips/mm/c-r4k.c22
-rw-r--r--arch/mips/mm/cache.c6
-rw-r--r--arch/mips/mm/cex-oct.S70
-rw-r--r--arch/mips/mm/dma-default.c25
-rw-r--r--arch/mips/mm/fault.c21
-rw-r--r--arch/mips/mm/tlb-r4k.c5
-rw-r--r--arch/mips/mm/tlbex.c1
9 files changed, 426 insertions, 32 deletions
diff --git a/arch/mips/mm/Makefile b/arch/mips/mm/Makefile
index 95ba32b5b72..d7ec9552229 100644
--- a/arch/mips/mm/Makefile
+++ b/arch/mips/mm/Makefile
@@ -27,6 +27,7 @@ obj-$(CONFIG_CPU_SB1) += c-r4k.o cerr-sb1.o cex-sb1.o tlb-r4k.o
obj-$(CONFIG_CPU_TX39XX) += c-tx39.o tlb-r3k.o
obj-$(CONFIG_CPU_TX49XX) += c-r4k.o cex-gen.o tlb-r4k.o
obj-$(CONFIG_CPU_VR41XX) += c-r4k.o cex-gen.o tlb-r4k.o
+obj-$(CONFIG_CPU_CAVIUM_OCTEON) += c-octeon.o cex-oct.o tlb-r4k.o
obj-$(CONFIG_IP22_CPU_SCACHE) += sc-ip22.o
obj-$(CONFIG_R5000_CPU_SCACHE) += sc-r5k.o
diff --git a/arch/mips/mm/c-octeon.c b/arch/mips/mm/c-octeon.c
new file mode 100644
index 00000000000..44d01a0a849
--- /dev/null
+++ b/arch/mips/mm/c-octeon.c
@@ -0,0 +1,307 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2005-2007 Cavium Networks
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/bitops.h>
+#include <linux/cpu.h>
+#include <linux/io.h>
+
+#include <asm/bcache.h>
+#include <asm/bootinfo.h>
+#include <asm/cacheops.h>
+#include <asm/cpu-features.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/r4kcache.h>
+#include <asm/system.h>
+#include <asm/mmu_context.h>
+#include <asm/war.h>
+
+#include <asm/octeon/octeon.h>
+
+unsigned long long cache_err_dcache[NR_CPUS];
+
+/**
+ * Octeon automatically flushes the dcache on tlb changes, so
+ * from Linux's viewpoint it acts much like a physically
+ * tagged cache. No flushing is needed
+ *
+ */
+static void octeon_flush_data_cache_page(unsigned long addr)
+{
+ /* Nothing to do */
+}
+
+static inline void octeon_local_flush_icache(void)
+{
+ asm volatile ("synci 0($0)");
+}
+
+/*
+ * Flush local I-cache for the specified range.
+ */
+static void local_octeon_flush_icache_range(unsigned long start,
+ unsigned long end)
+{
+ octeon_local_flush_icache();
+}
+
+/**
+ * Flush caches as necessary for all cores affected by a
+ * vma. If no vma is supplied, all cores are flushed.
+ *
+ * @vma: VMA to flush or NULL to flush all icaches.
+ */
+static void octeon_flush_icache_all_cores(struct vm_area_struct *vma)
+{
+ extern void octeon_send_ipi_single(int cpu, unsigned int action);
+#ifdef CONFIG_SMP
+ int cpu;
+ cpumask_t mask;
+#endif
+
+ mb();
+ octeon_local_flush_icache();
+#ifdef CONFIG_SMP
+ preempt_disable();
+ cpu = smp_processor_id();
+
+ /*
+ * If we have a vma structure, we only need to worry about
+ * cores it has been used on
+ */
+ if (vma)
+ mask = vma->vm_mm->cpu_vm_mask;
+ else
+ mask = cpu_online_map;
+ cpu_clear(cpu, mask);
+ for_each_cpu_mask(cpu, mask)
+ octeon_send_ipi_single(cpu, SMP_ICACHE_FLUSH);
+
+ preempt_enable();
+#endif
+}
+
+
+/**
+ * Called to flush the icache on all cores
+ */
+static void octeon_flush_icache_all(void)
+{
+ octeon_flush_icache_all_cores(NULL);
+}
+
+
+/**
+ * Called to flush all memory associated with a memory
+ * context.
+ *
+ * @mm: Memory context to flush
+ */
+static void octeon_flush_cache_mm(struct mm_struct *mm)
+{
+ /*
+ * According to the R4K version of this file, CPUs without
+ * dcache aliases don't need to do anything here
+ */
+}
+
+
+/**
+ * Flush a range of kernel addresses out of the icache
+ *
+ */
+static void octeon_flush_icache_range(unsigned long start, unsigned long end)
+{
+ octeon_flush_icache_all_cores(NULL);
+}
+
+
+/**
+ * Flush the icache for a trampoline. These are used for interrupt
+ * and exception hooking.
+ *
+ * @addr: Address to flush
+ */
+static void octeon_flush_cache_sigtramp(unsigned long addr)
+{
+ struct vm_area_struct *vma;
+
+ vma = find_vma(current->mm, addr);
+ octeon_flush_icache_all_cores(vma);
+}
+
+
+/**
+ * Flush a range out of a vma
+ *
+ * @vma: VMA to flush
+ * @start:
+ * @end:
+ */
+static void octeon_flush_cache_range(struct vm_area_struct *vma,
+ unsigned long start, unsigned long end)
+{
+ if (vma->vm_flags & VM_EXEC)
+ octeon_flush_icache_all_cores(vma);
+}
+
+
+/**
+ * Flush a specific page of a vma
+ *
+ * @vma: VMA to flush page for
+ * @page: Page to flush
+ * @pfn:
+ */
+static void octeon_flush_cache_page(struct vm_area_struct *vma,
+ unsigned long page, unsigned long pfn)
+{
+ if (vma->vm_flags & VM_EXEC)
+ octeon_flush_icache_all_cores(vma);
+}
+
+
+/**
+ * Probe Octeon's caches
+ *
+ */
+static void __devinit probe_octeon(void)
+{
+ unsigned long icache_size;
+ unsigned long dcache_size;
+ unsigned int config1;
+ struct cpuinfo_mips *c = &current_cpu_data;
+
+ switch (c->cputype) {
+ case CPU_CAVIUM_OCTEON:
+ config1 = read_c0_config1();
+ c->icache.linesz = 2 << ((config1 >> 19) & 7);
+ c->icache.sets = 64 << ((config1 >> 22) & 7);
+ c->icache.ways = 1 + ((config1 >> 16) & 7);
+ c->icache.flags |= MIPS_CACHE_VTAG;
+ icache_size =
+ c->icache.sets * c->icache.ways * c->icache.linesz;
+ c->icache.waybit = ffs(icache_size / c->icache.ways) - 1;
+ c->dcache.linesz = 128;
+ if (OCTEON_IS_MODEL(OCTEON_CN3XXX))
+ c->dcache.sets = 1; /* CN3XXX has one Dcache set */
+ else
+ c->dcache.sets = 2; /* CN5XXX has two Dcache sets */
+ c->dcache.ways = 64;
+ dcache_size =
+ c->dcache.sets * c->dcache.ways * c->dcache.linesz;
+ c->dcache.waybit = ffs(dcache_size / c->dcache.ways) - 1;
+ c->options |= MIPS_CPU_PREFETCH;
+ break;
+
+ default:
+ panic("Unsupported Cavium Networks CPU type\n");
+ break;
+ }
+
+ /* compute a couple of other cache variables */
+ c->icache.waysize = icache_size / c->icache.ways;
+ c->dcache.waysize = dcache_size / c->dcache.ways;
+
+ c->icache.sets = icache_size / (c->icache.linesz * c->icache.ways);
+ c->dcache.sets = dcache_size / (c->dcache.linesz * c->dcache.ways);
+
+ if (smp_processor_id() == 0) {
+ pr_notice("Primary instruction cache %ldkB, %s, %d way, "
+ "%d sets, linesize %d bytes.\n",
+ icache_size >> 10,
+ cpu_has_vtag_icache ?
+ "virtually tagged" : "physically tagged",
+ c->icache.ways, c->icache.sets, c->icache.linesz);
+
+ pr_notice("Primary data cache %ldkB, %d-way, %d sets, "
+ "linesize %d bytes.\n",
+ dcache_size >> 10, c->dcache.ways,
+ c->dcache.sets, c->dcache.linesz);
+ }
+}
+
+
+/**
+ * Setup the Octeon cache flush routines
+ *
+ */
+void __devinit octeon_cache_init(void)
+{
+ extern unsigned long ebase;
+ extern char except_vec2_octeon;
+
+ memcpy((void *)(ebase + 0x100), &except_vec2_octeon, 0x80);
+ octeon_flush_cache_sigtramp(ebase + 0x100);
+
+ probe_octeon();
+
+ shm_align_mask = PAGE_SIZE - 1;
+
+ flush_cache_all = octeon_flush_icache_all;
+ __flush_cache_all = octeon_flush_icache_all;
+ flush_cache_mm = octeon_flush_cache_mm;
+ flush_cache_page = octeon_flush_cache_page;
+ flush_cache_range = octeon_flush_cache_range;
+ flush_cache_sigtramp = octeon_flush_cache_sigtramp;
+ flush_icache_all = octeon_flush_icache_all;
+ flush_data_cache_page = octeon_flush_data_cache_page;
+ flush_icache_range = octeon_flush_icache_range;
+ local_flush_icache_range = local_octeon_flush_icache_range;
+
+ build_clear_page();
+ build_copy_page();
+}
+
+/**
+ * Handle a cache error exception
+ */
+
+static void cache_parity_error_octeon(int non_recoverable)
+{
+ unsigned long coreid = cvmx_get_core_num();
+ uint64_t icache_err = read_octeon_c0_icacheerr();
+
+ pr_err("Cache error exception:\n");
+ pr_err("cp0_errorepc == %lx\n", read_c0_errorepc());
+ if (icache_err & 1) {
+ pr_err("CacheErr (Icache) == %llx\n",
+ (unsigned long long)icache_err);
+ write_octeon_c0_icacheerr(0);
+ }
+ if (cache_err_dcache[coreid] & 1) {
+ pr_err("CacheErr (Dcache) == %llx\n",
+ (unsigned long long)cache_err_dcache[coreid]);
+ cache_err_dcache[coreid] = 0;
+ }
+
+ if (non_recoverable)
+ panic("Can't handle cache error: nested exception");
+}
+
+/**
+ * Called when the the exception is not recoverable
+ */
+
+asmlinkage void cache_parity_error_octeon_recoverable(void)
+{
+ cache_parity_error_octeon(0);
+}
+
+/**
+ * Called when the the exception is recoverable
+ */
+
+asmlinkage void cache_parity_error_octeon_non_recoverable(void)
+{
+ cache_parity_error_octeon(1);
+}
+
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index 6e99665ae86..c43f4b26a69 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -618,15 +618,35 @@ static void r4k_dma_cache_inv(unsigned long addr, unsigned long size)
if (cpu_has_inclusive_pcaches) {
if (size >= scache_size)
r4k_blast_scache();
- else
+ else {
+ unsigned long lsize = cpu_scache_line_size();
+ unsigned long almask = ~(lsize - 1);
+
+ /*
+ * There is no clearly documented alignment requirement
+ * for the cache instruction on MIPS processors and
+ * some processors, among them the RM5200 and RM7000
+ * QED processors will throw an address error for cache
+ * hit ops with insufficient alignment. Solved by
+ * aligning the address to cache line size.
+ */
+ cache_op(Hit_Writeback_Inv_SD, addr & almask);
+ cache_op(Hit_Writeback_Inv_SD,
+ (addr + size - 1) & almask);
blast_inv_scache_range(addr, addr + size);
+ }
return;
}
if (cpu_has_safe_index_cacheops && size >= dcache_size) {
r4k_blast_dcache();
} else {
+ unsigned long lsize = cpu_dcache_line_size();
+ unsigned long almask = ~(lsize - 1);
+
R4600_HIT_CACHEOP_WAR_IMPL;
+ cache_op(Hit_Writeback_Inv_D, addr & almask);
+ cache_op(Hit_Writeback_Inv_D, (addr + size - 1) & almask);
blast_inv_dcache_range(addr, addr + size);
}
diff --git a/arch/mips/mm/cache.c b/arch/mips/mm/cache.c
index 1eb7c71e3d6..98ad0a82c29 100644
--- a/arch/mips/mm/cache.c
+++ b/arch/mips/mm/cache.c
@@ -182,6 +182,12 @@ void __devinit cpu_cache_init(void)
tx39_cache_init();
}
+ if (cpu_has_octeon_cache) {
+ extern void __weak octeon_cache_init(void);
+
+ octeon_cache_init();
+ }
+
setup_protection_map();
}
diff --git a/arch/mips/mm/cex-oct.S b/arch/mips/mm/cex-oct.S
new file mode 100644
index 00000000000..3db8553fcd3
--- /dev/null
+++ b/arch/mips/mm/cex-oct.S
@@ -0,0 +1,70 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2006 Cavium Networks
+ * Cache error handler
+ */
+
+#include <asm/asm.h>
+#include <asm/regdef.h>
+#include <asm/mipsregs.h>
+#include <asm/stackframe.h>
+
+/*
+ * Handle cache error. Indicate to the second level handler whether
+ * the exception is recoverable.
+ */
+ LEAF(except_vec2_octeon)
+
+ .set push
+ .set mips64r2
+ .set noreorder
+ .set noat
+
+
+ /* due to an errata we need to read the COP0 CacheErr (Dcache)
+ * before any cache/DRAM access */
+
+ rdhwr k0, $0 /* get core_id */
+ PTR_LA k1, cache_err_dcache
+ sll k0, k0, 3
+ PTR_ADDU k1, k0, k1 /* k1 = &cache_err_dcache[core_id] */
+
+ dmfc0 k0, CP0_CACHEERR, 1
+ sd k0, (k1)
+ dmtc0 $0, CP0_CACHEERR, 1
+
+ /* check whether this is a nested exception */
+ mfc0 k1, CP0_STATUS
+ andi k1, k1, ST0_EXL
+ beqz k1, 1f
+ nop
+ j cache_parity_error_octeon_non_recoverable
+ nop
+
+ /* exception is recoverable */
+1: j handle_cache_err
+ nop
+
+ .set pop
+ END(except_vec2_octeon)
+
+ /* We need to jump to handle_cache_err so that the previous handler
+ * can fit within 0x80 bytes. We also move from 0xFFFFFFFFAXXXXXXX
+ * space (uncached) to the 0xFFFFFFFF8XXXXXXX space (cached). */
+ LEAF(handle_cache_err)
+ .set push
+ .set noreorder
+ .set noat
+
+ SAVE_ALL
+ KMODE
+ jal cache_parity_error_octeon_recoverable
+ nop
+ j ret_from_exception
+ nop
+
+ .set pop
+ END(handle_cache_err)
diff --git a/arch/mips/mm/dma-default.c b/arch/mips/mm/dma-default.c
index e6708b3ad34..546e6977d4f 100644
--- a/arch/mips/mm/dma-default.c
+++ b/arch/mips/mm/dma-default.c
@@ -111,7 +111,7 @@ EXPORT_SYMBOL(dma_alloc_coherent);
void dma_free_noncoherent(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_handle)
{
- plat_unmap_dma_mem(dma_handle);
+ plat_unmap_dma_mem(dev, dma_handle);
free_pages((unsigned long) vaddr, get_order(size));
}
@@ -122,7 +122,7 @@ void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
{
unsigned long addr = (unsigned long) vaddr;
- plat_unmap_dma_mem(dma_handle);
+ plat_unmap_dma_mem(dev, dma_handle);
if (!plat_device_is_coherent(dev))
addr = CAC_ADDR(addr);
@@ -173,7 +173,7 @@ void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
__dma_sync(dma_addr_to_virt(dma_addr), size,
direction);
- plat_unmap_dma_mem(dma_addr);
+ plat_unmap_dma_mem(dev, dma_addr);
}
EXPORT_SYMBOL(dma_unmap_single);
@@ -229,7 +229,7 @@ void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
dma_cache_wback_inv(addr, size);
}
- plat_unmap_dma_mem(dma_address);
+ plat_unmap_dma_mem(dev, dma_address);
}
EXPORT_SYMBOL(dma_unmap_page);
@@ -249,7 +249,7 @@ void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
if (addr)
__dma_sync(addr, sg->length, direction);
}
- plat_unmap_dma_mem(sg->dma_address);
+ plat_unmap_dma_mem(dev, sg->dma_address);
}
}
@@ -275,6 +275,7 @@ void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
{
BUG_ON(direction == DMA_NONE);
+ plat_extra_sync_for_device(dev);
if (!plat_device_is_coherent(dev)) {
unsigned long addr;
@@ -305,6 +306,7 @@ void dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
{
BUG_ON(direction == DMA_NONE);
+ plat_extra_sync_for_device(dev);
if (!plat_device_is_coherent(dev)) {
unsigned long addr;
@@ -351,22 +353,14 @@ EXPORT_SYMBOL(dma_sync_sg_for_device);
int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
- return 0;
+ return plat_dma_mapping_error(dev, dma_addr);
}
EXPORT_SYMBOL(dma_mapping_error);
int dma_supported(struct device *dev, u64 mask)
{
- /*
- * we fall back to GFP_DMA when the mask isn't all 1s,
- * so we can't guarantee allocations that must be
- * within a tighter range than GFP_DMA..
- */
- if (mask < DMA_BIT_MASK(24))
- return 0;
-
- return 1;
+ return plat_dma_supported(dev, mask);
}
EXPORT_SYMBOL(dma_supported);
@@ -383,6 +377,7 @@ void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
{
BUG_ON(direction == DMA_NONE);
+ plat_extra_sync_for_device(dev);
if (!plat_device_is_coherent(dev))
__dma_sync((unsigned long)vaddr, size, direction);
}
diff --git a/arch/mips/mm/fault.c b/arch/mips/mm/fault.c
index fa636fc6b7b..55767ad9f00 100644
--- a/arch/mips/mm/fault.c
+++ b/arch/mips/mm/fault.c
@@ -97,7 +97,6 @@ good_area:
goto bad_area;
}
-survive:
/*
* If for any reason at all we couldn't handle the fault,
* make sure we exit gracefully rather than endlessly redo
@@ -167,21 +166,13 @@ no_context:
field, regs->regs[31]);
die("Oops", regs);
-/*
- * We ran out of memory, or some other thing happened to us that made
- * us unable to handle the page fault gracefully.
- */
out_of_memory:
- up_read(&mm->mmap_sem);
- if (is_global_init(tsk)) {
- yield();
- down_read(&mm->mmap_sem);
- goto survive;
- }
- printk("VM: killing process %s\n", tsk->comm);
- if (user_mode(regs))
- do_group_exit(SIGKILL);
- goto no_context;
+ /*
+ * We ran out of memory, call the OOM killer, and return the userspace
+ * (which will retry the fault, or kill us if we got oom-killed).
+ */
+ pagefault_out_of_memory();
+ return;
do_sigbus:
up_read(&mm->mmap_sem);
diff --git a/arch/mips/mm/tlb-r4k.c b/arch/mips/mm/tlb-r4k.c
index 5ce2fa74562..9619f66e531 100644
--- a/arch/mips/mm/tlb-r4k.c
+++ b/arch/mips/mm/tlb-r4k.c
@@ -478,7 +478,10 @@ void __cpuinit tlb_init(void)
probe_tlb(config);
write_c0_pagemask(PM_DEFAULT_MASK);
write_c0_wired(0);
- write_c0_framemask(0);
+ if (current_cpu_type() == CPU_R10000 ||
+ current_cpu_type() == CPU_R12000 ||
+ current_cpu_type() == CPU_R14000)
+ write_c0_framemask(0);
temp_tlb_entry = current_cpu_data.tlbsize - 1;
/* From this point on the ARC firmware is dead. */
diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c
index 979cf919728..42942038d0f 100644
--- a/arch/mips/mm/tlbex.c
+++ b/arch/mips/mm/tlbex.c
@@ -317,6 +317,7 @@ static void __cpuinit build_tlb_write_entry(u32 **p, struct uasm_label **l,
case CPU_BCM3302:
case CPU_BCM4710:
case CPU_LOONGSON2:
+ case CPU_CAVIUM_OCTEON:
if (m4kc_tlbp_war())
uasm_i_nop(p);
tlbw(p);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-27 23:19:47 +0000