diff options
Diffstat (limited to 'arch/sparc64')
| -rw-r--r-- | arch/sparc64/mm/init.c | 54 |
1 files changed, 26 insertions, 28 deletions
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c index aaf9a3eee997..141d4cc5fc53 100644 --- a/arch/sparc64/mm/init.c +++ b/arch/sparc64/mm/init.c @@ -310,6 +310,7 @@ struct linux_prom_translation { unsigned long size; unsigned long data; }; +static struct linux_prom_translation prom_trans[512] __initdata; extern unsigned long prom_boot_page; extern void prom_remap(unsigned long physpage, unsigned long virtpage, int mmu_ihandle); @@ -363,7 +364,6 @@ unsigned long prom_virt_to_phys(unsigned long promva, int *error) static void inherit_prom_mappings(void) { - struct linux_prom_translation *trans; unsigned long phys_page, tte_vaddr, tte_data; void (*remap_func)(unsigned long, unsigned long, int); pmd_t *pmdp; @@ -373,30 +373,27 @@ static void inherit_prom_mappings(void) node = prom_finddevice("/virtual-memory"); n = prom_getproplen(node, "translations"); if (n == 0 || n == -1) { - prom_printf("Couldn't get translation property\n"); + prom_printf("prom_mappings: Couldn't get size.\n"); prom_halt(); } - n += 5 * sizeof(struct linux_prom_translation); - for (tsz = 1; tsz < n; tsz <<= 1) - /* empty */; - trans = __alloc_bootmem(tsz, SMP_CACHE_BYTES, bootmap_base); - if (trans == NULL) { - prom_printf("inherit_prom_mappings: Cannot alloc translations.\n"); + n += 24 * sizeof(struct linux_prom_translation); + if (n > sizeof(prom_trans)) { + prom_printf("prom_mappings: prom_trans too small, " + "need %Zd bytes\n", n); prom_halt(); } - memset(trans, 0, tsz); - - if ((n = prom_getproperty(node, "translations", (char *)trans, tsz)) == -1) { - prom_printf("Couldn't get translation property\n"); + tsz = n; + if ((n = prom_getproperty(node, "translations", + (char *)&prom_trans[0], tsz)) == -1) { + prom_printf("prom_mappings: Couldn't get property.\n"); prom_halt(); } - n = n / sizeof(*trans); + n = n / sizeof(struct linux_prom_translation); - /* - * The obp translations are saved based on 8k pagesize, since obp can - * use a mixture of pagesizes. Misses to the 0xf0000000 - 0x100000000, - * ie obp range, are handled in entry.S and do not use the vpte scheme - * (see rant in inherit_locked_prom_mappings()). + /* The obp translations are saved based on 8k pagesize, since obp + * can use a mixture of pagesizes. Misses to the 0xf0000000 -> + * 0x100000000, ie obp range, are handled in entry.S and do not + * use the vpte scheme (see rant: inherit_locked_prom_mappings). */ #define OBP_PMD_SIZE 2048 prompmd = __alloc_bootmem(OBP_PMD_SIZE, OBP_PMD_SIZE, bootmap_base); @@ -406,9 +403,9 @@ static void inherit_prom_mappings(void) for (i = 0; i < n; i++) { unsigned long vaddr; - if (trans[i].virt >= LOW_OBP_ADDRESS && trans[i].virt < HI_OBP_ADDRESS) { - for (vaddr = trans[i].virt; - ((vaddr < trans[i].virt + trans[i].size) && + if (prom_trans[i].virt >= LOW_OBP_ADDRESS && prom_trans[i].virt < HI_OBP_ADDRESS) { + for (vaddr = prom_trans[i].virt; + ((vaddr < prom_trans[i].virt + prom_trans[i].size) && (vaddr < HI_OBP_ADDRESS)); vaddr += BASE_PAGE_SIZE) { unsigned long val; @@ -426,7 +423,7 @@ static void inherit_prom_mappings(void) ptep = (pte_t *)__pmd_page(*pmdp) + ((vaddr >> 13) & 0x3ff); - val = trans[i].data; + val = prom_trans[i].data; /* Clear diag TTE bits. */ if (tlb_type == spitfire) @@ -434,7 +431,7 @@ static void inherit_prom_mappings(void) set_pte_at(&init_mm, vaddr, ptep, __pte(val | _PAGE_MODIFIED)); - trans[i].data += BASE_PAGE_SIZE; + prom_trans[i].data += BASE_PAGE_SIZE; } } } @@ -571,15 +568,16 @@ static void inherit_prom_mappings(void) } /* Re-read translations property. */ - if ((n = prom_getproperty(node, "translations", (char *)trans, tsz)) == -1) { - prom_printf("Couldn't get translation property\n"); + if ((n = prom_getproperty(node, "translations", + (char *)&prom_trans[0], tsz)) == -1) { + prom_printf("prom_mappings: Can't reread prom_trans.\n"); prom_halt(); } - n = n / sizeof(*trans); + n = n / sizeof(struct linux_prom_translation); for (i = 0; i < n; i++) { - unsigned long vaddr = trans[i].virt; - unsigned long size = trans[i].size; + unsigned long vaddr = prom_trans[i].virt; + unsigned long size = prom_trans[i].size; if (vaddr < 0xf0000000UL) { unsigned long avoid_start = (unsigned long) KERNBASE; |
