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Diffstat (limited to 'arch/mips/mm/c-r3k.c')
-rw-r--r--arch/mips/mm/c-r3k.c125
1 files changed, 60 insertions, 65 deletions
diff --git a/arch/mips/mm/c-r3k.c b/arch/mips/mm/c-r3k.c
index 27f4fa25e8c..135ec313c1f 100644
--- a/arch/mips/mm/c-r3k.c
+++ b/arch/mips/mm/c-r3k.c
@@ -1,23 +1,22 @@
/*
* r2300.c: R2000 and R3000 specific mmu/cache code.
*
- * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
*
* with a lot of changes to make this thing work for R3000s
* Tx39XX R4k style caches added. HK
* Copyright (C) 1998, 1999, 2000 Harald Koerfgen
* Copyright (C) 1998 Gleb Raiko & Vladimir Roganov
- * Copyright (C) 2001, 2004 Maciej W. Rozycki
+ * Copyright (C) 2001, 2004, 2007 Maciej W. Rozycki
*/
-#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/sched.h>
+#include <linux/smp.h>
#include <linux/mm.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/mmu_context.h>
-#include <asm/system.h>
#include <asm/isadep.h>
#include <asm/io.h>
#include <asm/bootinfo.h>
@@ -26,9 +25,7 @@
static unsigned long icache_size, dcache_size; /* Size in bytes */
static unsigned long icache_lsize, dcache_lsize; /* Size in bytes */
-#undef DEBUG_CACHE
-
-unsigned long __init r3k_cache_size(unsigned long ca_flags)
+unsigned long r3k_cache_size(unsigned long ca_flags)
{
unsigned long flags, status, dummy, size;
volatile unsigned long *p;
@@ -63,7 +60,7 @@ unsigned long __init r3k_cache_size(unsigned long ca_flags)
return size * sizeof(*p);
}
-unsigned long __init r3k_cache_lsize(unsigned long ca_flags)
+unsigned long r3k_cache_lsize(unsigned long ca_flags)
{
unsigned long flags, status, lsize, i;
volatile unsigned long *p;
@@ -92,7 +89,7 @@ unsigned long __init r3k_cache_lsize(unsigned long ca_flags)
return lsize * sizeof(*p);
}
-static void __init r3k_probe_cache(void)
+static void r3k_probe_cache(void)
{
dcache_size = r3k_cache_size(ST0_ISC);
if (dcache_size)
@@ -121,7 +118,7 @@ static void r3k_flush_icache_range(unsigned long start, unsigned long end)
write_c0_status((ST0_ISC|ST0_SWC|flags)&~ST0_IEC);
for (i = 0; i < size; i += 0x080) {
- asm ( "sb\t$0, 0x000(%0)\n\t"
+ asm( "sb\t$0, 0x000(%0)\n\t"
"sb\t$0, 0x004(%0)\n\t"
"sb\t$0, 0x008(%0)\n\t"
"sb\t$0, 0x00c(%0)\n\t"
@@ -129,7 +126,7 @@ static void r3k_flush_icache_range(unsigned long start, unsigned long end)
"sb\t$0, 0x014(%0)\n\t"
"sb\t$0, 0x018(%0)\n\t"
"sb\t$0, 0x01c(%0)\n\t"
- "sb\t$0, 0x020(%0)\n\t"
+ "sb\t$0, 0x020(%0)\n\t"
"sb\t$0, 0x024(%0)\n\t"
"sb\t$0, 0x028(%0)\n\t"
"sb\t$0, 0x02c(%0)\n\t"
@@ -145,7 +142,7 @@ static void r3k_flush_icache_range(unsigned long start, unsigned long end)
"sb\t$0, 0x054(%0)\n\t"
"sb\t$0, 0x058(%0)\n\t"
"sb\t$0, 0x05c(%0)\n\t"
- "sb\t$0, 0x060(%0)\n\t"
+ "sb\t$0, 0x060(%0)\n\t"
"sb\t$0, 0x064(%0)\n\t"
"sb\t$0, 0x068(%0)\n\t"
"sb\t$0, 0x06c(%0)\n\t"
@@ -178,35 +175,35 @@ static void r3k_flush_dcache_range(unsigned long start, unsigned long end)
write_c0_status((ST0_ISC|flags)&~ST0_IEC);
for (i = 0; i < size; i += 0x080) {
- asm ( "sb\t$0, 0x000(%0)\n\t"
+ asm( "sb\t$0, 0x000(%0)\n\t"
"sb\t$0, 0x004(%0)\n\t"
"sb\t$0, 0x008(%0)\n\t"
"sb\t$0, 0x00c(%0)\n\t"
- "sb\t$0, 0x010(%0)\n\t"
+ "sb\t$0, 0x010(%0)\n\t"
"sb\t$0, 0x014(%0)\n\t"
"sb\t$0, 0x018(%0)\n\t"
"sb\t$0, 0x01c(%0)\n\t"
- "sb\t$0, 0x020(%0)\n\t"
+ "sb\t$0, 0x020(%0)\n\t"
"sb\t$0, 0x024(%0)\n\t"
"sb\t$0, 0x028(%0)\n\t"
"sb\t$0, 0x02c(%0)\n\t"
- "sb\t$0, 0x030(%0)\n\t"
+ "sb\t$0, 0x030(%0)\n\t"
"sb\t$0, 0x034(%0)\n\t"
"sb\t$0, 0x038(%0)\n\t"
"sb\t$0, 0x03c(%0)\n\t"
- "sb\t$0, 0x040(%0)\n\t"
+ "sb\t$0, 0x040(%0)\n\t"
"sb\t$0, 0x044(%0)\n\t"
"sb\t$0, 0x048(%0)\n\t"
"sb\t$0, 0x04c(%0)\n\t"
- "sb\t$0, 0x050(%0)\n\t"
+ "sb\t$0, 0x050(%0)\n\t"
"sb\t$0, 0x054(%0)\n\t"
"sb\t$0, 0x058(%0)\n\t"
"sb\t$0, 0x05c(%0)\n\t"
- "sb\t$0, 0x060(%0)\n\t"
+ "sb\t$0, 0x060(%0)\n\t"
"sb\t$0, 0x064(%0)\n\t"
"sb\t$0, 0x068(%0)\n\t"
"sb\t$0, 0x06c(%0)\n\t"
- "sb\t$0, 0x070(%0)\n\t"
+ "sb\t$0, 0x070(%0)\n\t"
"sb\t$0, 0x074(%0)\n\t"
"sb\t$0, 0x078(%0)\n\t"
"sb\t$0, 0x07c(%0)\n\t"
@@ -217,26 +214,6 @@ static void r3k_flush_dcache_range(unsigned long start, unsigned long end)
write_c0_status(flags);
}
-static inline unsigned long get_phys_page (unsigned long addr,
- struct mm_struct *mm)
-{
- pgd_t *pgd;
- pud_t *pud;
- pmd_t *pmd;
- pte_t *pte;
- unsigned long physpage;
-
- pgd = pgd_offset(mm, addr);
- pud = pud_offset(pgd, addr);
- pmd = pmd_offset(pud, addr);
- pte = pte_offset(pmd, addr);
-
- if ((physpage = pte_val(*pte)) & _PAGE_VALID)
- return KSEG0ADDR(physpage & PAGE_MASK);
-
- return 0;
-}
-
static inline void r3k_flush_cache_all(void)
{
}
@@ -252,64 +229,79 @@ static void r3k_flush_cache_mm(struct mm_struct *mm)
}
static void r3k_flush_cache_range(struct vm_area_struct *vma,
- unsigned long start, unsigned long end)
+ unsigned long start, unsigned long end)
{
}
-static void r3k_flush_cache_page(struct vm_area_struct *vma, unsigned long page, unsigned long pfn)
-{
-}
-
-static void r3k_flush_data_cache_page(unsigned long addr)
-{
-}
-
-static void r3k_flush_icache_page(struct vm_area_struct *vma, struct page *page)
+static void r3k_flush_cache_page(struct vm_area_struct *vma,
+ unsigned long addr, unsigned long pfn)
{
+ unsigned long kaddr = KSEG0ADDR(pfn << PAGE_SHIFT);
+ int exec = vma->vm_flags & VM_EXEC;
struct mm_struct *mm = vma->vm_mm;
- unsigned long physpage;
+ pgd_t *pgdp;
+ pud_t *pudp;
+ pmd_t *pmdp;
+ pte_t *ptep;
+
+ pr_debug("cpage[%08lx,%08lx]\n",
+ cpu_context(smp_processor_id(), mm), addr);
+ /* No ASID => no such page in the cache. */
if (cpu_context(smp_processor_id(), mm) == 0)
return;
- if (!(vma->vm_flags & VM_EXEC))
+ pgdp = pgd_offset(mm, addr);
+ pudp = pud_offset(pgdp, addr);
+ pmdp = pmd_offset(pudp, addr);
+ ptep = pte_offset(pmdp, addr);
+
+ /* Invalid => no such page in the cache. */
+ if (!(pte_val(*ptep) & _PAGE_PRESENT))
return;
-#ifdef DEBUG_CACHE
- printk("cpage[%d,%08lx]", cpu_context(smp_processor_id(), mm), page);
-#endif
+ r3k_flush_dcache_range(kaddr, kaddr + PAGE_SIZE);
+ if (exec)
+ r3k_flush_icache_range(kaddr, kaddr + PAGE_SIZE);
+}
- physpage = (unsigned long) page_address(page);
- if (physpage)
- r3k_flush_icache_range(physpage, physpage + PAGE_SIZE);
+static void local_r3k_flush_data_cache_page(void *addr)
+{
+}
+
+static void r3k_flush_data_cache_page(unsigned long addr)
+{
}
static void r3k_flush_cache_sigtramp(unsigned long addr)
{
unsigned long flags;
-#ifdef DEBUG_CACHE
- printk("csigtramp[%08lx]", addr);
-#endif
+ pr_debug("csigtramp[%08lx]\n", addr);
flags = read_c0_status();
write_c0_status(flags&~ST0_IEC);
/* Fill the TLB to avoid an exception with caches isolated. */
- asm ( "lw\t$0, 0x000(%0)\n\t"
+ asm( "lw\t$0, 0x000(%0)\n\t"
"lw\t$0, 0x004(%0)\n\t"
: : "r" (addr) );
write_c0_status((ST0_ISC|ST0_SWC|flags)&~ST0_IEC);
- asm ( "sb\t$0, 0x000(%0)\n\t"
+ asm( "sb\t$0, 0x000(%0)\n\t"
"sb\t$0, 0x004(%0)\n\t"
: : "r" (addr) );
write_c0_status(flags);
}
+static void r3k_flush_kernel_vmap_range(unsigned long vaddr, int size)
+{
+ BUG();
+}
+
static void r3k_dma_cache_wback_inv(unsigned long start, unsigned long size)
{
/* Catch bad driver code */
@@ -319,7 +311,7 @@ static void r3k_dma_cache_wback_inv(unsigned long start, unsigned long size)
r3k_flush_dcache_range(start, start + size);
}
-void __init r3k_cache_init(void)
+void r3k_cache_init(void)
{
extern void build_clear_page(void);
extern void build_copy_page(void);
@@ -331,10 +323,13 @@ void __init r3k_cache_init(void)
flush_cache_mm = r3k_flush_cache_mm;
flush_cache_range = r3k_flush_cache_range;
flush_cache_page = r3k_flush_cache_page;
- flush_icache_page = r3k_flush_icache_page;
flush_icache_range = r3k_flush_icache_range;
+ local_flush_icache_range = r3k_flush_icache_range;
+
+ __flush_kernel_vmap_range = r3k_flush_kernel_vmap_range;
flush_cache_sigtramp = r3k_flush_cache_sigtramp;
+ local_flush_data_cache_page = local_r3k_flush_data_cache_page;
flush_data_cache_page = r3k_flush_data_cache_page;
_dma_cache_wback_inv = r3k_dma_cache_wback_inv;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 20:20:49 +0000