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Diffstat (limited to 'arch/sparc/mm/srmmu.c')
-rw-r--r--arch/sparc/mm/srmmu.c358
1 files changed, 174 insertions, 184 deletions
diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c
index 036c2797dece..f8fb4911d360 100644
--- a/arch/sparc/mm/srmmu.c
+++ b/arch/sparc/mm/srmmu.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* srmmu.c: SRMMU specific routines for memory management.
*
@@ -10,10 +11,11 @@
#include <linux/seq_file.h>
#include <linux/spinlock.h>
-#include <linux/bootmem.h>
+#include <linux/memblock.h>
#include <linux/pagemap.h>
#include <linux/vmalloc.h>
#include <linux/kdebug.h>
+#include <linux/export.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/log2.h>
@@ -35,7 +37,6 @@
#include <asm/mbus.h>
#include <asm/page.h>
#include <asm/asi.h>
-#include <asm/msi.h>
#include <asm/smp.h>
#include <asm/io.h>
@@ -48,11 +49,12 @@
#include <asm/mxcc.h>
#include <asm/ross.h>
-#include "srmmu.h"
+#include "mm_32.h"
enum mbus_module srmmu_modtype;
static unsigned int hwbug_bitmask;
int vac_cache_size;
+EXPORT_SYMBOL(vac_cache_size);
int vac_line_size;
extern struct resource sparc_iomap;
@@ -62,6 +64,7 @@ extern unsigned long last_valid_pfn;
static pgd_t *srmmu_swapper_pg_dir;
const struct sparc32_cachetlb_ops *sparc32_cachetlb_ops;
+EXPORT_SYMBOL(sparc32_cachetlb_ops);
#ifdef CONFIG_SMP
const struct sparc32_cachetlb_ops *local_ops;
@@ -98,7 +101,6 @@ static unsigned long srmmu_nocache_end;
#define SRMMU_NOCACHE_ALIGN_MAX (sizeof(ctxd_t)*SRMMU_MAX_CONTEXTS)
void *srmmu_nocache_pool;
-void *srmmu_nocache_bitmap;
static struct bit_map srmmu_nocache_map;
static inline int srmmu_pmd_none(pmd_t pmd)
@@ -106,40 +108,36 @@ static inline int srmmu_pmd_none(pmd_t pmd)
/* XXX should we hyper_flush_whole_icache here - Anton */
static inline void srmmu_ctxd_set(ctxd_t *ctxp, pgd_t *pgdp)
-{ set_pte((pte_t *)ctxp, (SRMMU_ET_PTD | (__nocache_pa((unsigned long) pgdp) >> 4))); }
-
-void pmd_set(pmd_t *pmdp, pte_t *ptep)
{
- unsigned long ptp; /* Physical address, shifted right by 4 */
- int i;
+ pte_t pte;
- ptp = __nocache_pa((unsigned long) ptep) >> 4;
- for (i = 0; i < PTRS_PER_PTE/SRMMU_REAL_PTRS_PER_PTE; i++) {
- set_pte((pte_t *)&pmdp->pmdv[i], SRMMU_ET_PTD | ptp);
- ptp += (SRMMU_REAL_PTRS_PER_PTE*sizeof(pte_t) >> 4);
- }
+ pte = __pte((SRMMU_ET_PTD | (__nocache_pa(pgdp) >> 4)));
+ set_pte((pte_t *)ctxp, pte);
}
-void pmd_populate(struct mm_struct *mm, pmd_t *pmdp, struct page *ptep)
-{
- unsigned long ptp; /* Physical address, shifted right by 4 */
- int i;
+/*
+ * Locations of MSI Registers.
+ */
+#define MSI_MBUS_ARBEN 0xe0001008 /* MBus Arbiter Enable register */
- ptp = page_to_pfn(ptep) << (PAGE_SHIFT-4); /* watch for overflow */
- for (i = 0; i < PTRS_PER_PTE/SRMMU_REAL_PTRS_PER_PTE; i++) {
- set_pte((pte_t *)&pmdp->pmdv[i], SRMMU_ET_PTD | ptp);
- ptp += (SRMMU_REAL_PTRS_PER_PTE*sizeof(pte_t) >> 4);
- }
-}
+/*
+ * Useful bits in the MSI Registers.
+ */
+#define MSI_ASYNC_MODE 0x80000000 /* Operate the MSI asynchronously */
-/* Find an entry in the third-level page table.. */
-pte_t *pte_offset_kernel(pmd_t *dir, unsigned long address)
+static void msi_set_sync(void)
{
- void *pte;
+ __asm__ __volatile__ ("lda [%0] %1, %%g3\n\t"
+ "andn %%g3, %2, %%g3\n\t"
+ "sta %%g3, [%0] %1\n\t" : :
+ "r" (MSI_MBUS_ARBEN),
+ "i" (ASI_M_CTL), "r" (MSI_ASYNC_MODE) : "g3");
+}
- pte = __nocache_va((dir->pmdv[0] & SRMMU_PTD_PMASK) << 4);
- return (pte_t *) pte +
- ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1));
+void pmd_set(pmd_t *pmdp, pte_t *ptep)
+{
+ unsigned long ptp = __nocache_pa(ptep) >> 4;
+ set_pte((pte_t *)&pmd_val(*pmdp), __pte(SRMMU_ET_PTD | ptp));
}
/*
@@ -149,18 +147,18 @@ pte_t *pte_offset_kernel(pmd_t *dir, unsigned long address)
*/
static void *__srmmu_get_nocache(int size, int align)
{
- int offset;
+ int offset, minsz = 1 << SRMMU_NOCACHE_BITMAP_SHIFT;
unsigned long addr;
- if (size < SRMMU_NOCACHE_BITMAP_SHIFT) {
+ if (size < minsz) {
printk(KERN_ERR "Size 0x%x too small for nocache request\n",
size);
- size = SRMMU_NOCACHE_BITMAP_SHIFT;
+ size = minsz;
}
- if (size & (SRMMU_NOCACHE_BITMAP_SHIFT - 1)) {
- printk(KERN_ERR "Size 0x%x unaligned int nocache request\n",
+ if (size & (minsz - 1)) {
+ printk(KERN_ERR "Size 0x%x unaligned in nocache request\n",
size);
- size += SRMMU_NOCACHE_BITMAP_SHIFT - 1;
+ size += minsz - 1;
}
BUG_ON(align > SRMMU_NOCACHE_ALIGN_MAX);
@@ -171,7 +169,7 @@ static void *__srmmu_get_nocache(int size, int align)
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 NULL;
}
addr = SRMMU_NOCACHE_VADDR + (offset << SRMMU_NOCACHE_BITMAP_SHIFT);
@@ -267,8 +265,11 @@ static void __init srmmu_nocache_calcsize(void)
static void __init srmmu_nocache_init(void)
{
+ void *srmmu_nocache_bitmap;
unsigned int bitmap_bits;
pgd_t *pgd;
+ p4d_t *p4d;
+ pud_t *pud;
pmd_t *pmd;
pte_t *pte;
unsigned long paddr, vaddr;
@@ -276,13 +277,13 @@ static void __init srmmu_nocache_init(void)
bitmap_bits = srmmu_nocache_size >> SRMMU_NOCACHE_BITMAP_SHIFT;
- srmmu_nocache_pool = __alloc_bootmem(srmmu_nocache_size,
- SRMMU_NOCACHE_ALIGN_MAX, 0UL);
+ srmmu_nocache_pool = memblock_alloc_or_panic(srmmu_nocache_size,
+ SRMMU_NOCACHE_ALIGN_MAX);
memset(srmmu_nocache_pool, 0, srmmu_nocache_size);
srmmu_nocache_bitmap =
- __alloc_bootmem(BITS_TO_LONGS(bitmap_bits) * sizeof(long),
- SMP_CACHE_BYTES, 0UL);
+ memblock_alloc_or_panic(BITS_TO_LONGS(bitmap_bits) * sizeof(long),
+ SMP_CACHE_BYTES);
bit_map_init(&srmmu_nocache_map, srmmu_nocache_bitmap, bitmap_bits);
srmmu_swapper_pg_dir = __srmmu_get_nocache(SRMMU_PGD_TABLE_SIZE, SRMMU_PGD_TABLE_SIZE);
@@ -296,7 +297,9 @@ static void __init srmmu_nocache_init(void)
while (vaddr < srmmu_nocache_end) {
pgd = pgd_offset_k(vaddr);
- pmd = pmd_offset(__nocache_fix(pgd), vaddr);
+ p4d = p4d_offset(pgd, vaddr);
+ pud = pud_offset(p4d, vaddr);
+ pmd = pmd_offset(__nocache_fix(pud), vaddr);
pte = pte_offset_kernel(__nocache_fix(pmd), vaddr);
pteval = ((paddr >> 4) | SRMMU_ET_PTE | SRMMU_PRIV);
@@ -337,30 +340,36 @@ pgd_t *get_pgd_fast(void)
* Alignments up to the page size are the same for physical and virtual
* addresses of the nocache area.
*/
-pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
+pgtable_t pte_alloc_one(struct mm_struct *mm)
{
- unsigned long pte;
+ pte_t *ptep;
struct page *page;
- if ((pte = (unsigned long)pte_alloc_one_kernel(mm, address)) == 0)
+ if (!(ptep = pte_alloc_one_kernel(mm)))
return NULL;
- page = pfn_to_page(__nocache_pa(pte) >> PAGE_SHIFT);
- pgtable_page_ctor(page);
- return page;
+ page = pfn_to_page(__nocache_pa((unsigned long)ptep) >> PAGE_SHIFT);
+ spin_lock(&mm->page_table_lock);
+ if (page_ref_inc_return(page) == 2 &&
+ !pagetable_pte_ctor(mm, page_ptdesc(page))) {
+ page_ref_dec(page);
+ ptep = NULL;
+ }
+ spin_unlock(&mm->page_table_lock);
+
+ return ptep;
}
-void pte_free(struct mm_struct *mm, pgtable_t pte)
+void pte_free(struct mm_struct *mm, pgtable_t ptep)
{
- unsigned long p;
+ struct page *page;
- pgtable_page_dtor(pte);
- p = (unsigned long)page_address(pte); /* Cached address (for test) */
- if (p == 0)
- BUG();
- p = page_to_pfn(pte) << PAGE_SHIFT; /* Physical address */
+ page = pfn_to_page(__nocache_pa((unsigned long)ptep) >> PAGE_SHIFT);
+ spin_lock(&mm->page_table_lock);
+ if (page_ref_dec_return(page) == 1)
+ pagetable_dtor(page_ptdesc(page));
+ spin_unlock(&mm->page_table_lock);
- /* free non cached virtual address*/
- srmmu_free_nocache(__nocache_va(p), PTE_SIZE);
+ srmmu_free_nocache(ptep, SRMMU_PTE_TABLE_SIZE);
}
/* context handling - a dynamically sized pool is used */
@@ -437,7 +446,7 @@ static void __init sparc_context_init(int numctx)
unsigned long size;
size = numctx * sizeof(struct ctx_list);
- ctx_list_pool = __alloc_bootmem(size, SMP_CACHE_BYTES, 0UL);
+ ctx_list_pool = memblock_alloc_or_panic(size, SMP_CACHE_BYTES);
for (ctx = 0; ctx < numctx; ctx++) {
struct ctx_list *clist;
@@ -455,10 +464,12 @@ static void __init sparc_context_init(int numctx)
void switch_mm(struct mm_struct *old_mm, struct mm_struct *mm,
struct task_struct *tsk)
{
+ unsigned long flags;
+
if (mm->context == NO_CONTEXT) {
- spin_lock(&srmmu_context_spinlock);
+ spin_lock_irqsave(&srmmu_context_spinlock, flags);
alloc_context(old_mm, mm);
- spin_unlock(&srmmu_context_spinlock);
+ spin_unlock_irqrestore(&srmmu_context_spinlock, flags);
srmmu_ctxd_set(&srmmu_context_table[mm->context], mm->pgd);
}
@@ -476,13 +487,17 @@ static inline void srmmu_mapioaddr(unsigned long physaddr,
unsigned long virt_addr, int bus_type)
{
pgd_t *pgdp;
+ p4d_t *p4dp;
+ pud_t *pudp;
pmd_t *pmdp;
pte_t *ptep;
unsigned long tmp;
physaddr &= PAGE_MASK;
pgdp = pgd_offset_k(virt_addr);
- pmdp = pmd_offset(pgdp, virt_addr);
+ p4dp = p4d_offset(pgdp, virt_addr);
+ pudp = pud_offset(p4dp, virt_addr);
+ pmdp = pmd_offset(pudp, virt_addr);
ptep = pte_offset_kernel(pmdp, virt_addr);
tmp = (physaddr >> 4) | SRMMU_ET_PTE;
@@ -511,11 +526,16 @@ void srmmu_mapiorange(unsigned int bus, unsigned long xpa,
static inline void srmmu_unmapioaddr(unsigned long virt_addr)
{
pgd_t *pgdp;
+ p4d_t *p4dp;
+ pud_t *pudp;
pmd_t *pmdp;
pte_t *ptep;
+
pgdp = pgd_offset_k(virt_addr);
- pmdp = pmd_offset(pgdp, virt_addr);
+ p4dp = p4d_offset(pgdp, virt_addr);
+ pudp = pud_offset(p4dp, virt_addr);
+ pmdp = pmd_offset(pudp, virt_addr);
ptep = pte_offset_kernel(pmdp, virt_addr);
/* No need to flush uncacheable page. */
@@ -653,21 +673,25 @@ static void __init srmmu_early_allocate_ptable_skeleton(unsigned long start,
unsigned long end)
{
pgd_t *pgdp;
+ p4d_t *p4dp;
+ pud_t *pudp;
pmd_t *pmdp;
pte_t *ptep;
while (start < end) {
pgdp = pgd_offset_k(start);
- if (pgd_none(*(pgd_t *)__nocache_fix(pgdp))) {
+ p4dp = p4d_offset(pgdp, start);
+ pudp = pud_offset(p4dp, start);
+ if (pud_none(*__nocache_fix(pudp))) {
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);
+ pud_set(__nocache_fix(pudp), pmdp);
}
- pmdp = pmd_offset(__nocache_fix(pgdp), start);
- if (srmmu_pmd_none(*(pmd_t *)__nocache_fix(pmdp))) {
+ pmdp = pmd_offset(__nocache_fix(pudp), start);
+ if (srmmu_pmd_none(*__nocache_fix(pmdp))) {
ptep = __srmmu_get_nocache(PTE_SIZE, PTE_SIZE);
if (ptep == NULL)
early_pgtable_allocfail("pte");
@@ -684,19 +708,23 @@ static void __init srmmu_allocate_ptable_skeleton(unsigned long start,
unsigned long end)
{
pgd_t *pgdp;
+ p4d_t *p4dp;
+ pud_t *pudp;
pmd_t *pmdp;
pte_t *ptep;
while (start < end) {
pgdp = pgd_offset_k(start);
- if (pgd_none(*pgdp)) {
+ p4dp = p4d_offset(pgdp, start);
+ pudp = pud_offset(p4dp, start);
+ if (pud_none(*pudp)) {
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);
+ pud_set((pud_t *)pgdp, pmdp);
}
- pmdp = pmd_offset(pgdp, start);
+ pmdp = pmd_offset(pudp, start);
if (srmmu_pmd_none(*pmdp)) {
ptep = __srmmu_get_nocache(PTE_SIZE,
PTE_SIZE);
@@ -723,7 +751,7 @@ static inline unsigned long srmmu_probe(unsigned long vaddr)
"=r" (retval) :
"r" (vaddr | 0x400), "i" (ASI_M_FLUSH_PROBE));
} else {
- retval = leon_swprobe(vaddr, 0);
+ retval = leon_swprobe(vaddr, NULL);
}
return retval;
}
@@ -739,6 +767,8 @@ static void __init srmmu_inherit_prom_mappings(unsigned long start,
unsigned long probed;
unsigned long addr;
pgd_t *pgdp;
+ p4d_t *p4dp;
+ pud_t *pudp;
pmd_t *pmdp;
pte_t *ptep;
int what; /* 0 = normal-pte, 1 = pmd-level pte, 2 = pgd-level pte */
@@ -759,53 +789,47 @@ static void __init srmmu_inherit_prom_mappings(unsigned long start,
what = 0;
addr = start - PAGE_SIZE;
- if (!(start & ~(SRMMU_REAL_PMD_MASK))) {
- if (srmmu_probe(addr + SRMMU_REAL_PMD_SIZE) == probed)
+ if (!(start & ~(PMD_MASK))) {
+ if (srmmu_probe(addr + PMD_SIZE) == probed)
what = 1;
}
- if (!(start & ~(SRMMU_PGDIR_MASK))) {
- if (srmmu_probe(addr + SRMMU_PGDIR_SIZE) == probed)
+ if (!(start & ~(PGDIR_MASK))) {
+ if (srmmu_probe(addr + PGDIR_SIZE) == probed)
what = 2;
}
pgdp = pgd_offset_k(start);
+ p4dp = p4d_offset(pgdp, start);
+ pudp = pud_offset(p4dp, start);
if (what == 2) {
- *(pgd_t *)__nocache_fix(pgdp) = __pgd(probed);
- start += SRMMU_PGDIR_SIZE;
+ *__nocache_fix(pgdp) = __pgd(probed);
+ start += PGDIR_SIZE;
continue;
}
- if (pgd_none(*(pgd_t *)__nocache_fix(pgdp))) {
+ if (pud_none(*__nocache_fix(pudp))) {
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);
+ pud_set(__nocache_fix(pudp), pmdp);
}
- pmdp = pmd_offset(__nocache_fix(pgdp), start);
- if (srmmu_pmd_none(*(pmd_t *)__nocache_fix(pmdp))) {
+ pmdp = pmd_offset(__nocache_fix(pudp), start);
+ if (what == 1) {
+ *(pmd_t *)__nocache_fix(pmdp) = __pmd(probed);
+ start += PMD_SIZE;
+ continue;
+ }
+ if (srmmu_pmd_none(*__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
- * 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;
- 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(probed);
+ *__nocache_fix(ptep) = __pte(probed);
start += PAGE_SIZE;
}
}
@@ -819,15 +843,15 @@ static void __init do_large_mapping(unsigned long vaddr, unsigned long phys_base
unsigned long big_pte;
big_pte = KERNEL_PTE(phys_base >> 4);
- *(pgd_t *)__nocache_fix(pgdp) = __pgd(big_pte);
+ *__nocache_fix(pgdp) = __pgd(big_pte);
}
/* Map sp_bank entry SP_ENTRY, starting at virtual address VBASE. */
static unsigned long __init map_spbank(unsigned long vbase, int sp_entry)
{
- unsigned long pstart = (sp_banks[sp_entry].base_addr & SRMMU_PGDIR_MASK);
- unsigned long vstart = (vbase & SRMMU_PGDIR_MASK);
- unsigned long vend = SRMMU_PGDIR_ALIGN(vbase + sp_banks[sp_entry].num_bytes);
+ unsigned long pstart = (sp_banks[sp_entry].base_addr & PGDIR_MASK);
+ unsigned long vstart = (vbase & PGDIR_MASK);
+ unsigned long vend = PGDIR_ALIGN(vbase + sp_banks[sp_entry].num_bytes);
/* Map "low" memory only */
const unsigned long min_vaddr = PAGE_OFFSET;
const unsigned long max_vaddr = PAGE_OFFSET + SRMMU_MAXMEM;
@@ -840,7 +864,7 @@ static unsigned long __init map_spbank(unsigned long vbase, int sp_entry)
while (vstart < vend) {
do_large_mapping(vstart, pstart);
- vstart += SRMMU_PGDIR_SIZE; pstart += SRMMU_PGDIR_SIZE;
+ vstart += PGDIR_SIZE; pstart += PGDIR_SIZE;
}
return vstart;
}
@@ -858,9 +882,7 @@ static void __init map_kernel(void)
}
}
-void (*poke_srmmu)(void) __cpuinitdata = NULL;
-
-extern unsigned long bootmem_init(unsigned long *pages_avail);
+void (*poke_srmmu)(void) = NULL;
void __init srmmu_paging_init(void)
{
@@ -868,6 +890,8 @@ void __init srmmu_paging_init(void)
phandle cpunode;
char node_str[128];
pgd_t *pgd;
+ p4d_t *p4d;
+ pud_t *pud;
pmd_t *pmd;
pte_t *pte;
unsigned long pages_avail;
@@ -906,10 +930,10 @@ void __init srmmu_paging_init(void)
/* ctx table has to be physically aligned to its size */
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);
+ srmmu_ctx_table_phys = (ctxd_t *)__nocache_pa(srmmu_context_table);
for (i = 0; i < num_contexts; i++)
- srmmu_ctxd_set((ctxd_t *)__nocache_fix(&srmmu_context_table[i]), srmmu_swapper_pg_dir);
+ srmmu_ctxd_set(__nocache_fix(&srmmu_context_table[i]), srmmu_swapper_pg_dir);
flush_cache_all();
srmmu_set_ctable_ptr((unsigned long)srmmu_ctx_table_phys);
@@ -929,7 +953,9 @@ void __init srmmu_paging_init(void)
srmmu_allocate_ptable_skeleton(PKMAP_BASE, PKMAP_END);
pgd = pgd_offset_k(PKMAP_BASE);
- pmd = pmd_offset(pgd, PKMAP_BASE);
+ p4d = p4d_offset(pgd, PKMAP_BASE);
+ pud = pud_offset(p4d, PKMAP_BASE);
+ pmd = pmd_offset(pud, PKMAP_BASE);
pte = pte_offset_kernel(pmd, PKMAP_BASE);
pkmap_page_table = pte;
@@ -938,27 +964,14 @@ void __init srmmu_paging_init(void)
sparc_context_init(num_contexts);
- kmap_init();
-
{
- unsigned long zones_size[MAX_NR_ZONES];
- unsigned long zholes_size[MAX_NR_ZONES];
- unsigned long npages;
- int znum;
-
- for (znum = 0; znum < MAX_NR_ZONES; znum++)
- zones_size[znum] = zholes_size[znum] = 0;
-
- npages = max_low_pfn - pfn_base;
+ unsigned long max_zone_pfn[MAX_NR_ZONES] = { 0 };
- zones_size[ZONE_DMA] = npages;
- zholes_size[ZONE_DMA] = npages - pages_avail;
+ max_zone_pfn[ZONE_DMA] = max_low_pfn;
+ max_zone_pfn[ZONE_NORMAL] = max_low_pfn;
+ max_zone_pfn[ZONE_HIGHMEM] = highend_pfn;
- npages = highend_pfn - max_low_pfn;
- zones_size[ZONE_HIGHMEM] = npages;
- zholes_size[ZONE_HIGHMEM] = npages - calc_highpages();
-
- free_area_init_node(0, zones_size, pfn_base, zholes_size);
+ free_area_init(max_zone_pfn);
}
}
@@ -983,14 +996,15 @@ int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
void destroy_context(struct mm_struct *mm)
{
+ unsigned long flags;
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);
- spin_lock(&srmmu_context_spinlock);
+ spin_lock_irqsave(&srmmu_context_spinlock, flags);
free_context(mm->context);
- spin_unlock(&srmmu_context_spinlock);
+ spin_unlock_irqrestore(&srmmu_context_spinlock, flags);
mm->context = NO_CONTEXT;
}
}
@@ -1055,7 +1069,7 @@ static void __init init_vac_layout(void)
(int)vac_cache_size, (int)vac_line_size);
}
-static void __cpuinit poke_hypersparc(void)
+static void poke_hypersparc(void)
{
volatile unsigned long clear;
unsigned long mreg = srmmu_get_mmureg();
@@ -1107,7 +1121,7 @@ static void __init init_hypersparc(void)
hypersparc_setup_blockops();
}
-static void __cpuinit poke_swift(void)
+static void poke_swift(void)
{
unsigned long mreg;
@@ -1287,7 +1301,7 @@ static void turbosparc_flush_tlb_page(struct vm_area_struct *vma, unsigned long
}
-static void __cpuinit poke_turbosparc(void)
+static void poke_turbosparc(void)
{
unsigned long mreg = srmmu_get_mmureg();
unsigned long ccreg;
@@ -1350,7 +1364,7 @@ static void __init init_turbosparc(void)
poke_srmmu = poke_turbosparc;
}
-static void __cpuinit poke_tsunami(void)
+static void poke_tsunami(void)
{
unsigned long mreg = srmmu_get_mmureg();
@@ -1391,7 +1405,7 @@ static void __init init_tsunami(void)
tsunami_setup_blockops();
}
-static void __cpuinit poke_viking(void)
+static void poke_viking(void)
{
unsigned long mreg = srmmu_get_mmureg();
static int smp_catch;
@@ -1433,7 +1447,7 @@ static void __cpuinit poke_viking(void)
srmmu_set_mmureg(mreg);
}
-static struct sparc32_cachetlb_ops viking_ops = {
+static struct sparc32_cachetlb_ops viking_ops __ro_after_init = {
.cache_all = viking_flush_cache_all,
.cache_mm = viking_flush_cache_mm,
.cache_page = viking_flush_cache_page,
@@ -1464,7 +1478,7 @@ static struct sparc32_cachetlb_ops viking_ops = {
* flushes going at once will require SMP locking anyways so there's
* no real value in trying any harder than this.
*/
-static struct sparc32_cachetlb_ops viking_sun4d_smp_ops = {
+static struct sparc32_cachetlb_ops viking_sun4d_smp_ops __ro_after_init = {
.cache_all = viking_flush_cache_all,
.cache_mm = viking_flush_cache_mm,
.cache_page = viking_flush_cache_page,
@@ -1491,7 +1505,7 @@ static void __init init_viking(void)
/*
* We need this to make sure old viking takes no hits
- * on it's cache for dma snoops to workaround the
+ * on its cache for dma snoops to workaround the
* "load from non-cacheable memory" interrupt bug.
* This is only necessary because of the new way in
* which we use the IOMMU.
@@ -1615,30 +1629,32 @@ static void __init get_srmmu_type(void)
/* Local cross-calls. */
static void smp_flush_page_for_dma(unsigned long page)
{
- xc1((smpfunc_t) local_ops->page_for_dma, page);
+ xc1(local_ops->page_for_dma, page);
local_ops->page_for_dma(page);
}
static void smp_flush_cache_all(void)
{
- xc0((smpfunc_t) local_ops->cache_all);
+ xc0(local_ops->cache_all);
local_ops->cache_all();
}
static void smp_flush_tlb_all(void)
{
- xc0((smpfunc_t) local_ops->tlb_all);
+ xc0(local_ops->tlb_all);
local_ops->tlb_all();
}
+static bool any_other_mm_cpus(struct mm_struct *mm)
+{
+ return cpumask_any_but(mm_cpumask(mm), smp_processor_id()) < nr_cpu_ids;
+}
+
static void smp_flush_cache_mm(struct mm_struct *mm)
{
if (mm->context != NO_CONTEXT) {
- cpumask_t cpu_mask;
- cpumask_copy(&cpu_mask, mm_cpumask(mm));
- cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
- if (!cpumask_empty(&cpu_mask))
- xc1((smpfunc_t) local_ops->cache_mm, (unsigned long) mm);
+ if (any_other_mm_cpus(mm))
+ xc1(local_ops->cache_mm, (unsigned long)mm);
local_ops->cache_mm(mm);
}
}
@@ -1646,11 +1662,8 @@ static void smp_flush_cache_mm(struct mm_struct *mm)
static void smp_flush_tlb_mm(struct mm_struct *mm)
{
if (mm->context != NO_CONTEXT) {
- cpumask_t cpu_mask;
- cpumask_copy(&cpu_mask, mm_cpumask(mm));
- cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
- if (!cpumask_empty(&cpu_mask)) {
- xc1((smpfunc_t) local_ops->tlb_mm, (unsigned long) mm);
+ if (any_other_mm_cpus(mm)) {
+ xc1(local_ops->tlb_mm, (unsigned long)mm);
if (atomic_read(&mm->mm_users) == 1 && current->active_mm == mm)
cpumask_copy(mm_cpumask(mm),
cpumask_of(smp_processor_id()));
@@ -1666,12 +1679,9 @@ static void smp_flush_cache_range(struct vm_area_struct *vma,
struct mm_struct *mm = vma->vm_mm;
if (mm->context != NO_CONTEXT) {
- cpumask_t cpu_mask;
- cpumask_copy(&cpu_mask, mm_cpumask(mm));
- cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
- if (!cpumask_empty(&cpu_mask))
- xc3((smpfunc_t) local_ops->cache_range,
- (unsigned long) vma, start, end);
+ if (any_other_mm_cpus(mm))
+ xc3(local_ops->cache_range, (unsigned long)vma, start,
+ end);
local_ops->cache_range(vma, start, end);
}
}
@@ -1683,12 +1693,9 @@ static void smp_flush_tlb_range(struct vm_area_struct *vma,
struct mm_struct *mm = vma->vm_mm;
if (mm->context != NO_CONTEXT) {
- cpumask_t cpu_mask;
- cpumask_copy(&cpu_mask, mm_cpumask(mm));
- cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
- if (!cpumask_empty(&cpu_mask))
- xc3((smpfunc_t) local_ops->tlb_range,
- (unsigned long) vma, start, end);
+ if (any_other_mm_cpus(mm))
+ xc3(local_ops->tlb_range, (unsigned long)vma, start,
+ end);
local_ops->tlb_range(vma, start, end);
}
}
@@ -1698,12 +1705,8 @@ static void smp_flush_cache_page(struct vm_area_struct *vma, unsigned long page)
struct mm_struct *mm = vma->vm_mm;
if (mm->context != NO_CONTEXT) {
- cpumask_t cpu_mask;
- cpumask_copy(&cpu_mask, mm_cpumask(mm));
- cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
- if (!cpumask_empty(&cpu_mask))
- xc2((smpfunc_t) local_ops->cache_page,
- (unsigned long) vma, page);
+ if (any_other_mm_cpus(mm))
+ xc2(local_ops->cache_page, (unsigned long)vma, page);
local_ops->cache_page(vma, page);
}
}
@@ -1713,12 +1716,8 @@ static void smp_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
struct mm_struct *mm = vma->vm_mm;
if (mm->context != NO_CONTEXT) {
- cpumask_t cpu_mask;
- cpumask_copy(&cpu_mask, mm_cpumask(mm));
- cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
- if (!cpumask_empty(&cpu_mask))
- xc2((smpfunc_t) local_ops->tlb_page,
- (unsigned long) vma, page);
+ if (any_other_mm_cpus(mm))
+ xc2(local_ops->tlb_page, (unsigned long)vma, page);
local_ops->tlb_page(vma, page);
}
}
@@ -1732,23 +1731,19 @@ static void smp_flush_page_to_ram(unsigned long page)
* XXX This experiment failed, research further... -DaveM
*/
#if 1
- xc1((smpfunc_t) local_ops->page_to_ram, page);
+ xc1(local_ops->page_to_ram, page);
#endif
local_ops->page_to_ram(page);
}
static void smp_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr)
{
- cpumask_t cpu_mask;
- cpumask_copy(&cpu_mask, mm_cpumask(mm));
- cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
- if (!cpumask_empty(&cpu_mask))
- xc2((smpfunc_t) local_ops->sig_insns,
- (unsigned long) mm, insn_addr);
+ if (any_other_mm_cpus(mm))
+ xc2(local_ops->sig_insns, (unsigned long)mm, insn_addr);
local_ops->sig_insns(mm, insn_addr);
}
-static struct sparc32_cachetlb_ops smp_cachetlb_ops = {
+static struct sparc32_cachetlb_ops smp_cachetlb_ops __ro_after_init = {
.cache_all = smp_flush_cache_all,
.cache_mm = smp_flush_cache_mm,
.cache_page = smp_flush_cache_page,
@@ -1766,9 +1761,6 @@ static struct sparc32_cachetlb_ops smp_cachetlb_ops = {
/* Load up routines and constants for sun4m and sun4d mmu */
void __init load_mmu(void)
{
- extern void ld_mmu_iommu(void);
- extern void ld_mmu_iounit(void);
-
/* Functions */
get_srmmu_type();
@@ -1800,9 +1792,7 @@ void __init load_mmu(void)
&smp_cachetlb_ops;
#endif
- if (sparc_cpu_model == sun4d)
- ld_mmu_iounit();
- else
+ if (sparc_cpu_model != sun4d)
ld_mmu_iommu();
#ifdef CONFIG_SMP
if (sparc_cpu_model == sun4d)
generated by cgit (git 2.34.1) at 2025-12-25 06:04:16 +0000