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-rw-r--r--arch/sparc/mm/srmmu.c332
1 files changed, 201 insertions, 131 deletions
diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c
index 62e3f5773303..c38bb72e3e80 100644
--- a/arch/sparc/mm/srmmu.c
+++ b/arch/sparc/mm/srmmu.c
@@ -8,45 +8,45 @@
* Copyright (C) 1999,2000 Anton Blanchard (anton@samba.org)
*/
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/vmalloc.h>
-#include <linux/pagemap.h>
-#include <linux/init.h>
+#include <linux/seq_file.h>
#include <linux/spinlock.h>
#include <linux/bootmem.h>
-#include <linux/fs.h>
-#include <linux/seq_file.h>
+#include <linux/pagemap.h>
+#include <linux/vmalloc.h>
#include <linux/kdebug.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
#include <linux/log2.h>
#include <linux/gfp.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
-#include <asm/bitext.h>
-#include <asm/page.h>
+#include <asm/mmu_context.h>
+#include <asm/cacheflush.h>
+#include <asm/tlbflush.h>
+#include <asm/io-unit.h>
#include <asm/pgalloc.h>
#include <asm/pgtable.h>
-#include <asm/io.h>
+#include <asm/bitext.h>
#include <asm/vaddrs.h>
-#include <asm/traps.h>
-#include <asm/smp.h>
-#include <asm/mbus.h>
#include <asm/cache.h>
+#include <asm/traps.h>
#include <asm/oplib.h>
+#include <asm/mbus.h>
+#include <asm/page.h>
#include <asm/asi.h>
#include <asm/msi.h>
-#include <asm/mmu_context.h>
-#include <asm/io-unit.h>
-#include <asm/cacheflush.h>
-#include <asm/tlbflush.h>
+#include <asm/smp.h>
+#include <asm/io.h>
/* Now the cpu specific definitions. */
-#include <asm/viking.h>
-#include <asm/mxcc.h>
-#include <asm/ross.h>
+#include <asm/turbosparc.h>
#include <asm/tsunami.h>
+#include <asm/viking.h>
#include <asm/swift.h>
-#include <asm/turbosparc.h>
#include <asm/leon.h>
+#include <asm/mxcc.h>
+#include <asm/ross.h>
#include "srmmu.h"
@@ -55,10 +55,6 @@ static unsigned int hwbug_bitmask;
int vac_cache_size;
int vac_line_size;
-struct ctx_list *ctx_list_pool;
-struct ctx_list ctx_free;
-struct ctx_list ctx_used;
-
extern struct resource sparc_iomap;
extern unsigned long last_valid_pfn;
@@ -136,8 +132,8 @@ void pmd_populate(struct mm_struct *mm, pmd_t *pmdp, struct page *ptep)
}
}
-/* Find an entry in the third-level page table.. */
-pte_t *pte_offset_kernel(pmd_t * dir, unsigned long address)
+/* Find an entry in the third-level page table.. */
+pte_t *pte_offset_kernel(pmd_t *dir, unsigned long address)
{
void *pte;
@@ -151,55 +147,61 @@ pte_t *pte_offset_kernel(pmd_t * dir, unsigned long address)
* align: bytes, number to align at.
* Returns the virtual address of the allocated area.
*/
-static unsigned long __srmmu_get_nocache(int size, int align)
+static void *__srmmu_get_nocache(int size, int align)
{
int offset;
+ unsigned long addr;
if (size < SRMMU_NOCACHE_BITMAP_SHIFT) {
- printk("Size 0x%x too small for nocache request\n", size);
+ printk(KERN_ERR "Size 0x%x too small for nocache request\n",
+ size);
size = SRMMU_NOCACHE_BITMAP_SHIFT;
}
- if (size & (SRMMU_NOCACHE_BITMAP_SHIFT-1)) {
- printk("Size 0x%x unaligned int nocache request\n", size);
- size += SRMMU_NOCACHE_BITMAP_SHIFT-1;
+ if (size & (SRMMU_NOCACHE_BITMAP_SHIFT - 1)) {
+ printk(KERN_ERR "Size 0x%x unaligned int nocache request\n",
+ size);
+ size += SRMMU_NOCACHE_BITMAP_SHIFT - 1;
}
BUG_ON(align > SRMMU_NOCACHE_ALIGN_MAX);
offset = bit_map_string_get(&srmmu_nocache_map,
- size >> SRMMU_NOCACHE_BITMAP_SHIFT,
- align >> SRMMU_NOCACHE_BITMAP_SHIFT);
+ size >> SRMMU_NOCACHE_BITMAP_SHIFT,
+ align >> SRMMU_NOCACHE_BITMAP_SHIFT);
if (offset == -1) {
- printk("srmmu: out of nocache %d: %d/%d\n",
- size, (int) srmmu_nocache_size,
- srmmu_nocache_map.used << SRMMU_NOCACHE_BITMAP_SHIFT);
+ printk(KERN_ERR "srmmu: out of nocache %d: %d/%d\n",
+ size, (int) srmmu_nocache_size,
+ srmmu_nocache_map.used << SRMMU_NOCACHE_BITMAP_SHIFT);
return 0;
}
- return (SRMMU_NOCACHE_VADDR + (offset << SRMMU_NOCACHE_BITMAP_SHIFT));
+ addr = SRMMU_NOCACHE_VADDR + (offset << SRMMU_NOCACHE_BITMAP_SHIFT);
+ return (void *)addr;
}
-unsigned long srmmu_get_nocache(int size, int align)
+void *srmmu_get_nocache(int size, int align)
{
- unsigned long tmp;
+ void *tmp;
tmp = __srmmu_get_nocache(size, align);
if (tmp)
- memset((void *)tmp, 0, size);
+ memset(tmp, 0, size);
return tmp;
}
-void srmmu_free_nocache(unsigned long vaddr, int size)
+void srmmu_free_nocache(void *addr, int size)
{
+ unsigned long vaddr;
int offset;
+ vaddr = (unsigned long)addr;
if (vaddr < SRMMU_NOCACHE_VADDR) {
printk("Vaddr %lx is smaller than nocache base 0x%lx\n",
vaddr, (unsigned long)SRMMU_NOCACHE_VADDR);
BUG();
}
- if (vaddr+size > srmmu_nocache_end) {
+ if (vaddr + size > srmmu_nocache_end) {
printk("Vaddr %lx is bigger than nocache end 0x%lx\n",
vaddr, srmmu_nocache_end);
BUG();
@@ -212,7 +214,7 @@ void srmmu_free_nocache(unsigned long vaddr, int size)
printk("Size 0x%x is too small\n", size);
BUG();
}
- if (vaddr & (size-1)) {
+ if (vaddr & (size - 1)) {
printk("Vaddr %lx is not aligned to size 0x%x\n", vaddr, size);
BUG();
}
@@ -226,13 +228,23 @@ void srmmu_free_nocache(unsigned long vaddr, int size)
static void srmmu_early_allocate_ptable_skeleton(unsigned long start,
unsigned long end);
-extern unsigned long probe_memory(void); /* in fault.c */
+/* Return how much physical memory we have. */
+static unsigned long __init probe_memory(void)
+{
+ unsigned long total = 0;
+ int i;
+
+ for (i = 0; sp_banks[i].num_bytes; i++)
+ total += sp_banks[i].num_bytes;
+
+ return total;
+}
/*
* Reserve nocache dynamically proportionally to the amount of
* system RAM. -- Tomas Szepe <szepe@pinerecords.com>, June 2002
*/
-static void srmmu_nocache_calcsize(void)
+static void __init srmmu_nocache_calcsize(void)
{
unsigned long sysmemavail = probe_memory() / 1024;
int srmmu_nocache_npages;
@@ -271,7 +283,7 @@ static void __init srmmu_nocache_init(void)
srmmu_nocache_bitmap = __alloc_bootmem(bitmap_bits >> 3, SMP_CACHE_BYTES, 0UL);
bit_map_init(&srmmu_nocache_map, srmmu_nocache_bitmap, bitmap_bits);
- srmmu_swapper_pg_dir = (pgd_t *)__srmmu_get_nocache(SRMMU_PGD_TABLE_SIZE, SRMMU_PGD_TABLE_SIZE);
+ srmmu_swapper_pg_dir = __srmmu_get_nocache(SRMMU_PGD_TABLE_SIZE, SRMMU_PGD_TABLE_SIZE);
memset(__nocache_fix(srmmu_swapper_pg_dir), 0, SRMMU_PGD_TABLE_SIZE);
init_mm.pgd = srmmu_swapper_pg_dir;
@@ -304,7 +316,7 @@ pgd_t *get_pgd_fast(void)
{
pgd_t *pgd = NULL;
- pgd = (pgd_t *)__srmmu_get_nocache(SRMMU_PGD_TABLE_SIZE, SRMMU_PGD_TABLE_SIZE);
+ pgd = __srmmu_get_nocache(SRMMU_PGD_TABLE_SIZE, SRMMU_PGD_TABLE_SIZE);
if (pgd) {
pgd_t *init = pgd_offset_k(0);
memset(pgd, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
@@ -330,7 +342,7 @@ pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
if ((pte = (unsigned long)pte_alloc_one_kernel(mm, address)) == 0)
return NULL;
- page = pfn_to_page( __nocache_pa(pte) >> PAGE_SHIFT );
+ page = pfn_to_page(__nocache_pa(pte) >> PAGE_SHIFT);
pgtable_page_ctor(page);
return page;
}
@@ -344,18 +356,50 @@ void pte_free(struct mm_struct *mm, pgtable_t pte)
if (p == 0)
BUG();
p = page_to_pfn(pte) << PAGE_SHIFT; /* Physical address */
- p = (unsigned long) __nocache_va(p); /* Nocached virtual */
- srmmu_free_nocache(p, PTE_SIZE);
+
+ /* free non cached virtual address*/
+ srmmu_free_nocache(__nocache_va(p), PTE_SIZE);
}
-/*
- */
+/* context handling - a dynamically sized pool is used */
+#define NO_CONTEXT -1
+
+struct ctx_list {
+ struct ctx_list *next;
+ struct ctx_list *prev;
+ unsigned int ctx_number;
+ struct mm_struct *ctx_mm;
+};
+
+static struct ctx_list *ctx_list_pool;
+static struct ctx_list ctx_free;
+static struct ctx_list ctx_used;
+
+/* At boot time we determine the number of contexts */
+static int num_contexts;
+
+static inline void remove_from_ctx_list(struct ctx_list *entry)
+{
+ entry->next->prev = entry->prev;
+ entry->prev->next = entry->next;
+}
+
+static inline void add_to_ctx_list(struct ctx_list *head, struct ctx_list *entry)
+{
+ entry->next = head;
+ (entry->prev = head->prev)->next = entry;
+ head->prev = entry;
+}
+#define add_to_free_ctxlist(entry) add_to_ctx_list(&ctx_free, entry)
+#define add_to_used_ctxlist(entry) add_to_ctx_list(&ctx_used, entry)
+
+
static inline void alloc_context(struct mm_struct *old_mm, struct mm_struct *mm)
{
struct ctx_list *ctxp;
ctxp = ctx_free.next;
- if(ctxp != &ctx_free) {
+ if (ctxp != &ctx_free) {
remove_from_ctx_list(ctxp);
add_to_used_ctxlist(ctxp);
mm->context = ctxp->ctx_number;
@@ -363,9 +407,9 @@ static inline void alloc_context(struct mm_struct *old_mm, struct mm_struct *mm)
return;
}
ctxp = ctx_used.next;
- if(ctxp->ctx_mm == old_mm)
+ if (ctxp->ctx_mm == old_mm)
ctxp = ctxp->next;
- if(ctxp == &ctx_used)
+ if (ctxp == &ctx_used)
panic("out of mmu contexts");
flush_cache_mm(ctxp->ctx_mm);
flush_tlb_mm(ctxp->ctx_mm);
@@ -385,11 +429,31 @@ static inline void free_context(int context)
add_to_free_ctxlist(ctx_old);
}
+static void __init sparc_context_init(int numctx)
+{
+ int ctx;
+ unsigned long size;
+
+ size = numctx * sizeof(struct ctx_list);
+ ctx_list_pool = __alloc_bootmem(size, SMP_CACHE_BYTES, 0UL);
+
+ for (ctx = 0; ctx < numctx; ctx++) {
+ struct ctx_list *clist;
+
+ clist = (ctx_list_pool + ctx);
+ clist->ctx_number = ctx;
+ clist->ctx_mm = NULL;
+ }
+ ctx_free.next = ctx_free.prev = &ctx_free;
+ ctx_used.next = ctx_used.prev = &ctx_used;
+ for (ctx = 0; ctx < numctx; ctx++)
+ add_to_free_ctxlist(ctx_list_pool + ctx);
+}
void switch_mm(struct mm_struct *old_mm, struct mm_struct *mm,
struct task_struct *tsk)
{
- if(mm->context == NO_CONTEXT) {
+ if (mm->context == NO_CONTEXT) {
spin_lock(&srmmu_context_spinlock);
alloc_context(old_mm, mm);
spin_unlock(&srmmu_context_spinlock);
@@ -407,7 +471,7 @@ void switch_mm(struct mm_struct *old_mm, struct mm_struct *mm,
/* Low level IO area allocation on the SRMMU. */
static inline void srmmu_mapioaddr(unsigned long physaddr,
- unsigned long virt_addr, int bus_type)
+ unsigned long virt_addr, int bus_type)
{
pgd_t *pgdp;
pmd_t *pmdp;
@@ -420,8 +484,7 @@ static inline void srmmu_mapioaddr(unsigned long physaddr,
ptep = pte_offset_kernel(pmdp, virt_addr);
tmp = (physaddr >> 4) | SRMMU_ET_PTE;
- /*
- * I need to test whether this is consistent over all
+ /* I need to test whether this is consistent over all
* sun4m's. The bus_type represents the upper 4 bits of
* 36-bit physical address on the I/O space lines...
*/
@@ -591,10 +654,10 @@ static void __init srmmu_early_allocate_ptable_skeleton(unsigned long start,
pmd_t *pmdp;
pte_t *ptep;
- while(start < end) {
+ while (start < end) {
pgdp = pgd_offset_k(start);
if (pgd_none(*(pgd_t *)__nocache_fix(pgdp))) {
- pmdp = (pmd_t *) __srmmu_get_nocache(
+ pmdp = __srmmu_get_nocache(
SRMMU_PMD_TABLE_SIZE, SRMMU_PMD_TABLE_SIZE);
if (pmdp == NULL)
early_pgtable_allocfail("pmd");
@@ -602,8 +665,8 @@ static void __init srmmu_early_allocate_ptable_skeleton(unsigned long start,
pgd_set(__nocache_fix(pgdp), pmdp);
}
pmdp = pmd_offset(__nocache_fix(pgdp), start);
- if(srmmu_pmd_none(*(pmd_t *)__nocache_fix(pmdp))) {
- ptep = (pte_t *)__srmmu_get_nocache(PTE_SIZE, PTE_SIZE);
+ if (srmmu_pmd_none(*(pmd_t *)__nocache_fix(pmdp))) {
+ ptep = __srmmu_get_nocache(PTE_SIZE, PTE_SIZE);
if (ptep == NULL)
early_pgtable_allocfail("pte");
memset(__nocache_fix(ptep), 0, PTE_SIZE);
@@ -622,18 +685,18 @@ static void __init srmmu_allocate_ptable_skeleton(unsigned long start,
pmd_t *pmdp;
pte_t *ptep;
- while(start < end) {
+ while (start < end) {
pgdp = pgd_offset_k(start);
if (pgd_none(*pgdp)) {
- pmdp = (pmd_t *)__srmmu_get_nocache(SRMMU_PMD_TABLE_SIZE, SRMMU_PMD_TABLE_SIZE);
+ pmdp = __srmmu_get_nocache(SRMMU_PMD_TABLE_SIZE, SRMMU_PMD_TABLE_SIZE);
if (pmdp == NULL)
early_pgtable_allocfail("pmd");
memset(pmdp, 0, SRMMU_PMD_TABLE_SIZE);
pgd_set(pgdp, pmdp);
}
pmdp = pmd_offset(pgdp, start);
- if(srmmu_pmd_none(*pmdp)) {
- ptep = (pte_t *) __srmmu_get_nocache(PTE_SIZE,
+ if (srmmu_pmd_none(*pmdp)) {
+ ptep = __srmmu_get_nocache(PTE_SIZE,
PTE_SIZE);
if (ptep == NULL)
early_pgtable_allocfail("pte");
@@ -671,72 +734,76 @@ static inline unsigned long srmmu_probe(unsigned long vaddr)
static void __init srmmu_inherit_prom_mappings(unsigned long start,
unsigned long end)
{
+ unsigned long probed;
+ unsigned long addr;
pgd_t *pgdp;
pmd_t *pmdp;
pte_t *ptep;
- int what = 0; /* 0 = normal-pte, 1 = pmd-level pte, 2 = pgd-level pte */
- unsigned long prompte;
+ int what; /* 0 = normal-pte, 1 = pmd-level pte, 2 = pgd-level pte */
- while(start <= end) {
+ while (start <= end) {
if (start == 0)
break; /* probably wrap around */
- if(start == 0xfef00000)
+ if (start == 0xfef00000)
start = KADB_DEBUGGER_BEGVM;
- if(!(prompte = srmmu_probe(start))) {
+ probed = srmmu_probe(start);
+ if (!probed) {
+ /* continue probing until we find an entry */
start += PAGE_SIZE;
continue;
}
-
+
/* A red snapper, see what it really is. */
what = 0;
-
- if(!(start & ~(SRMMU_REAL_PMD_MASK))) {
- if(srmmu_probe((start-PAGE_SIZE) + SRMMU_REAL_PMD_SIZE) == prompte)
+ addr = start - PAGE_SIZE;
+
+ if (!(start & ~(SRMMU_REAL_PMD_MASK))) {
+ if (srmmu_probe(addr + SRMMU_REAL_PMD_SIZE) == probed)
what = 1;
}
-
- if(!(start & ~(SRMMU_PGDIR_MASK))) {
- if(srmmu_probe((start-PAGE_SIZE) + SRMMU_PGDIR_SIZE) ==
- prompte)
+
+ if (!(start & ~(SRMMU_PGDIR_MASK))) {
+ if (srmmu_probe(addr + SRMMU_PGDIR_SIZE) == probed)
what = 2;
}
-
+
pgdp = pgd_offset_k(start);
- if(what == 2) {
- *(pgd_t *)__nocache_fix(pgdp) = __pgd(prompte);
+ if (what == 2) {
+ *(pgd_t *)__nocache_fix(pgdp) = __pgd(probed);
start += SRMMU_PGDIR_SIZE;
continue;
}
if (pgd_none(*(pgd_t *)__nocache_fix(pgdp))) {
- pmdp = (pmd_t *)__srmmu_get_nocache(SRMMU_PMD_TABLE_SIZE, SRMMU_PMD_TABLE_SIZE);
+ pmdp = __srmmu_get_nocache(SRMMU_PMD_TABLE_SIZE,
+ SRMMU_PMD_TABLE_SIZE);
if (pmdp == NULL)
early_pgtable_allocfail("pmd");
memset(__nocache_fix(pmdp), 0, SRMMU_PMD_TABLE_SIZE);
pgd_set(__nocache_fix(pgdp), pmdp);
}
pmdp = pmd_offset(__nocache_fix(pgdp), start);
- if(srmmu_pmd_none(*(pmd_t *)__nocache_fix(pmdp))) {
- ptep = (pte_t *) __srmmu_get_nocache(PTE_SIZE,
- PTE_SIZE);
+ if (srmmu_pmd_none(*(pmd_t *)__nocache_fix(pmdp))) {
+ ptep = __srmmu_get_nocache(PTE_SIZE, PTE_SIZE);
if (ptep == NULL)
early_pgtable_allocfail("pte");
memset(__nocache_fix(ptep), 0, PTE_SIZE);
pmd_set(__nocache_fix(pmdp), ptep);
}
- if(what == 1) {
- /*
- * We bend the rule where all 16 PTPs in a pmd_t point
+ if (what == 1) {
+ /* We bend the rule where all 16 PTPs in a pmd_t point
* inside the same PTE page, and we leak a perfectly
* good hardware PTE piece. Alternatives seem worse.
*/
unsigned int x; /* Index of HW PMD in soft cluster */
+ unsigned long *val;
x = (start >> PMD_SHIFT) & 15;
- *(unsigned long *)__nocache_fix(&pmdp->pmdv[x]) = prompte;
+ val = &pmdp->pmdv[x];
+ *(unsigned long *)__nocache_fix(val) = probed;
start += SRMMU_REAL_PMD_SIZE;
continue;
}
ptep = pte_offset_kernel(__nocache_fix(pmdp), start);
- *(pte_t *)__nocache_fix(ptep) = __pte(prompte);
+ *(pte_t *)__nocache_fix(ptep) = __pte(probed);
start += PAGE_SIZE;
}
}
@@ -765,18 +832,18 @@ static unsigned long __init map_spbank(unsigned long vbase, int sp_entry)
if (vstart < min_vaddr || vstart >= max_vaddr)
return vstart;
-
+
if (vend > max_vaddr || vend < min_vaddr)
vend = max_vaddr;
- while(vstart < vend) {
+ while (vstart < vend) {
do_large_mapping(vstart, pstart);
vstart += SRMMU_PGDIR_SIZE; pstart += SRMMU_PGDIR_SIZE;
}
return vstart;
}
-static inline void map_kernel(void)
+static void __init map_kernel(void)
{
int i;
@@ -789,9 +856,6 @@ static inline void map_kernel(void)
}
}
-/* Paging initialization on the Sparc Reference MMU. */
-extern void sparc_context_init(int);
-
void (*poke_srmmu)(void) __cpuinitdata = NULL;
extern unsigned long bootmem_init(unsigned long *pages_avail);
@@ -806,6 +870,7 @@ void __init srmmu_paging_init(void)
pte_t *pte;
unsigned long pages_avail;
+ init_mm.context = (unsigned long) NO_CONTEXT;
sparc_iomap.start = SUN4M_IOBASE_VADDR; /* 16MB of IOSPACE on all sun4m's. */
if (sparc_cpu_model == sun4d)
@@ -814,9 +879,9 @@ void __init srmmu_paging_init(void)
/* Find the number of contexts on the srmmu. */
cpunode = prom_getchild(prom_root_node);
num_contexts = 0;
- while(cpunode != 0) {
+ while (cpunode != 0) {
prom_getstring(cpunode, "device_type", node_str, sizeof(node_str));
- if(!strcmp(node_str, "cpu")) {
+ if (!strcmp(node_str, "cpu")) {
num_contexts = prom_getintdefault(cpunode, "mmu-nctx", 0x8);
break;
}
@@ -824,7 +889,7 @@ void __init srmmu_paging_init(void)
}
}
- if(!num_contexts) {
+ if (!num_contexts) {
prom_printf("Something wrong, can't find cpu node in paging_init.\n");
prom_halt();
}
@@ -834,14 +899,14 @@ void __init srmmu_paging_init(void)
srmmu_nocache_calcsize();
srmmu_nocache_init();
- srmmu_inherit_prom_mappings(0xfe400000,(LINUX_OPPROM_ENDVM-PAGE_SIZE));
+ srmmu_inherit_prom_mappings(0xfe400000, (LINUX_OPPROM_ENDVM - PAGE_SIZE));
map_kernel();
/* ctx table has to be physically aligned to its size */
- srmmu_context_table = (ctxd_t *)__srmmu_get_nocache(num_contexts*sizeof(ctxd_t), num_contexts*sizeof(ctxd_t));
+ srmmu_context_table = __srmmu_get_nocache(num_contexts * sizeof(ctxd_t), num_contexts * sizeof(ctxd_t));
srmmu_ctx_table_phys = (ctxd_t *)__nocache_pa((unsigned long)srmmu_context_table);
- for(i = 0; i < num_contexts; i++)
+ for (i = 0; i < num_contexts; i++)
srmmu_ctxd_set((ctxd_t *)__nocache_fix(&srmmu_context_table[i]), srmmu_swapper_pg_dir);
flush_cache_all();
@@ -897,7 +962,7 @@ void __init srmmu_paging_init(void)
void mmu_info(struct seq_file *m)
{
- seq_printf(m,
+ seq_printf(m,
"MMU type\t: %s\n"
"contexts\t: %d\n"
"nocache total\t: %ld\n"
@@ -908,10 +973,16 @@ void mmu_info(struct seq_file *m)
srmmu_nocache_map.used << SRMMU_NOCACHE_BITMAP_SHIFT);
}
+int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
+{
+ mm->context = NO_CONTEXT;
+ return 0;
+}
+
void destroy_context(struct mm_struct *mm)
{
- if(mm->context != NO_CONTEXT) {
+ if (mm->context != NO_CONTEXT) {
flush_cache_mm(mm);
srmmu_ctxd_set(&srmmu_context_table[mm->context], srmmu_swapper_pg_dir);
flush_tlb_mm(mm);
@@ -941,13 +1012,12 @@ static void __init init_vac_layout(void)
#endif
nd = prom_getchild(prom_root_node);
- while((nd = prom_getsibling(nd)) != 0) {
+ while ((nd = prom_getsibling(nd)) != 0) {
prom_getstring(nd, "device_type", node_str, sizeof(node_str));
- if(!strcmp(node_str, "cpu")) {
+ if (!strcmp(node_str, "cpu")) {
vac_line_size = prom_getint(nd, "cache-line-size");
if (vac_line_size == -1) {
- prom_printf("can't determine cache-line-size, "
- "halting.\n");
+ prom_printf("can't determine cache-line-size, halting.\n");
prom_halt();
}
cache_lines = prom_getint(nd, "cache-nlines");
@@ -958,9 +1028,9 @@ static void __init init_vac_layout(void)
vac_cache_size = cache_lines * vac_line_size;
#ifdef CONFIG_SMP
- if(vac_cache_size > max_size)
+ if (vac_cache_size > max_size)
max_size = vac_cache_size;
- if(vac_line_size < min_line_size)
+ if (vac_line_size < min_line_size)
min_line_size = vac_line_size;
//FIXME: cpus not contiguous!!
cpu++;
@@ -971,7 +1041,7 @@ static void __init init_vac_layout(void)
#endif
}
}
- if(nd == 0) {
+ if (nd == 0) {
prom_printf("No CPU nodes found, halting.\n");
prom_halt();
}
@@ -1082,7 +1152,7 @@ static void __init init_swift(void)
"=r" (swift_rev) :
"r" (SWIFT_MASKID_ADDR), "i" (ASI_M_BYPASS));
srmmu_name = "Fujitsu Swift";
- switch(swift_rev) {
+ switch (swift_rev) {
case 0x11:
case 0x20:
case 0x23:
@@ -1222,10 +1292,11 @@ static void __cpuinit poke_turbosparc(void)
/* Clear any crap from the cache or else... */
turbosparc_flush_cache_all();
- mreg &= ~(TURBOSPARC_ICENABLE | TURBOSPARC_DCENABLE); /* Temporarily disable I & D caches */
+ /* Temporarily disable I & D caches */
+ mreg &= ~(TURBOSPARC_ICENABLE | TURBOSPARC_DCENABLE);
mreg &= ~(TURBOSPARC_PCENABLE); /* Don't check parity */
srmmu_set_mmureg(mreg);
-
+
ccreg = turbosparc_get_ccreg();
#ifdef TURBOSPARC_WRITEBACK
@@ -1248,7 +1319,7 @@ static void __cpuinit poke_turbosparc(void)
default:
ccreg |= (TURBOSPARC_SCENABLE);
}
- turbosparc_set_ccreg (ccreg);
+ turbosparc_set_ccreg(ccreg);
mreg |= (TURBOSPARC_ICENABLE | TURBOSPARC_DCENABLE); /* I & D caches on */
mreg |= (TURBOSPARC_ICSNOOP); /* Icache snooping on */
@@ -1342,7 +1413,7 @@ static void __cpuinit poke_viking(void)
unsigned long bpreg;
mreg &= ~(VIKING_TCENABLE);
- if(smp_catch++) {
+ if (smp_catch++) {
/* Must disable mixed-cmd mode here for other cpu's. */
bpreg = viking_get_bpreg();
bpreg &= ~(VIKING_ACTION_MIX);
@@ -1411,7 +1482,7 @@ static void __init init_viking(void)
unsigned long mreg = srmmu_get_mmureg();
/* Ahhh, the viking. SRMMU VLSI abortion number two... */
- if(mreg & VIKING_MMODE) {
+ if (mreg & VIKING_MMODE) {
srmmu_name = "TI Viking";
viking_mxcc_present = 0;
msi_set_sync();
@@ -1467,8 +1538,8 @@ static void __init get_srmmu_type(void)
}
/* Second, check for HyperSparc or Cypress. */
- if(mod_typ == 1) {
- switch(mod_rev) {
+ if (mod_typ == 1) {
+ switch (mod_rev) {
case 7:
/* UP or MP Hypersparc */
init_hypersparc();
@@ -1488,9 +1559,8 @@ static void __init get_srmmu_type(void)
}
return;
}
-
- /*
- * Now Fujitsu TurboSparc. It might happen that it is
+
+ /* Now Fujitsu TurboSparc. It might happen that it is
* in Swift emulation mode, so we will check later...
*/
if (psr_typ == 0 && psr_vers == 5) {
@@ -1499,15 +1569,15 @@ static void __init get_srmmu_type(void)
}
/* Next check for Fujitsu Swift. */
- if(psr_typ == 0 && psr_vers == 4) {
+ if (psr_typ == 0 && psr_vers == 4) {
phandle cpunode;
char node_str[128];
/* Look if it is not a TurboSparc emulating Swift... */
cpunode = prom_getchild(prom_root_node);
- while((cpunode = prom_getsibling(cpunode)) != 0) {
+ while ((cpunode = prom_getsibling(cpunode)) != 0) {
prom_getstring(cpunode, "device_type", node_str, sizeof(node_str));
- if(!strcmp(node_str, "cpu")) {
+ if (!strcmp(node_str, "cpu")) {
if (!prom_getintdefault(cpunode, "psr-implementation", 1) &&
prom_getintdefault(cpunode, "psr-version", 1) == 5) {
init_turbosparc();
@@ -1516,13 +1586,13 @@ static void __init get_srmmu_type(void)
break;
}
}
-
+
init_swift();
return;
}
/* Now the Viking family of srmmu. */
- if(psr_typ == 4 &&
+ if (psr_typ == 4 &&
((psr_vers == 0) ||
((psr_vers == 1) && (mod_typ == 0) && (mod_rev == 0)))) {
init_viking();
@@ -1530,7 +1600,7 @@ static void __init get_srmmu_type(void)
}
/* Finally the Tsunami. */
- if(psr_typ == 4 && psr_vers == 1 && (mod_typ || mod_rev)) {
+ if (psr_typ == 4 && psr_vers == 1 && (mod_typ || mod_rev)) {
init_tsunami();
return;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.