[Crash-utility] [PATCH v4 1/4] [ppc] Non-linear address translation routine

This patch moves the common code for traversing through the PGD, PTE tables in userspace virtual address translation and vmalloc address translation to a new routine. This will help us to make changes to the common code at a single place. This will be used for board based definitions for address translation Signed-off-by: Suzuki K. Poulose <suzuki(a)in.ibm.com&gt; --- ppc.c | 184 +++++++++++++++++++++++------------------------------------------ 1 files changed, 65 insertions(+), 119 deletions(-) diff --git a/ppc.c b/ppc.c index a9068c2..3834e7f 100755 --- a/ppc.c +++ b/ppc.c @@ -259,6 +259,69 @@ ppc_dump_machdep_table(ulong arg) fprintf(fp, " machspec: %lx\n", (ulong)machdep->machspec); } +static int +ppc_pgd_vtop(ulong *pgd, ulong vaddr, physaddr_t *paddr, int verbose) +{ + ulong *page_dir; + ulong *page_middle; + ulong *page_table; + ulong pgd_pte; + ulong pte; + + if (verbose) + fprintf(fp, "PAGE DIRECTORY: %lx\n", (ulong)pgd); + + page_dir = pgd + (vaddr >> PGDIR_SHIFT); + + FILL_PGD(PAGEBASE(pgd), KVADDR, PAGESIZE()); + pgd_pte = ULONG(machdep->pgd + PAGEOFFSET(page_dir)); + + if (verbose) + fprintf(fp, " PGD: %lx => %lx\n", (ulong)page_dir, pgd_pte); + + if (!pgd_pte) + goto no_page; + + page_middle = (ulong *)pgd_pte; + + if (machdep->flags & CPU_BOOKE) + page_table = page_middle + (BTOP(vaddr) & (PTRS_PER_PTE - 1)); + else { + page_table = (ulong *)((pgd_pte & (ulong)machdep->pagemask) + machdep->kvbase); + page_table += ((ulong)BTOP(vaddr) & (PTRS_PER_PTE-1)); + } + + if (verbose) + fprintf(fp, " PMD: %lx => %lx\n", (ulong)page_middle, + (ulong)page_table); + + FILL_PTBL(PAGEBASE(page_table), KVADDR, PAGESIZE()); + pte = ULONG(machdep->ptbl + PAGEOFFSET(page_table)); + + if (verbose) + fprintf(fp, " PTE: %lx => %lx\n", (ulong)page_table, pte); + + if (!(pte & _PAGE_PRESENT)) { + if (pte && verbose) { + fprintf(fp, "\n"); + ppc_translate_pte(pte, 0, 0); + } + goto no_page; + } + + if (verbose) { + fprintf(fp, " PAGE: %lx\n\n", PAGEBASE(pte)); + ppc_translate_pte(pte, 0, 0); + } + + *paddr = PAGEBASE(pte) + PAGEOFFSET(vaddr); + + return TRUE; + +no_page: + return FALSE; + +} /* * Translates a user virtual address to its physical address. cmd_vtop() @@ -275,11 +338,6 @@ ppc_uvtop(struct task_context *tc, ulong vaddr, physaddr_t *paddr, int verbose) { ulong mm, active_mm; ulong *pgd; - ulong *page_dir; - ulong *page_middle; - ulong *page_table; - ulong pgd_pte; - ulong pte; if (!tc) error(FATAL, "current context invalid\n"); @@ -315,62 +373,7 @@ ppc_uvtop(struct task_context *tc, ulong vaddr, physaddr_t *paddr, int verbose) FAULT_ON_ERROR); } - if (verbose) - fprintf(fp, "PAGE DIRECTORY: %lx\n", (ulong)pgd); - - page_dir = pgd + (vaddr >> PGDIR_SHIFT); - - FILL_PGD(PAGEBASE(pgd), KVADDR, PAGESIZE()); - pgd_pte = ULONG(machdep->pgd + PAGEOFFSET(page_dir)); - - if (verbose) - fprintf(fp, " PGD: %lx => %lx\n", (ulong)page_dir, pgd_pte); - - if (!pgd_pte) - goto no_upage; - - page_middle = (ulong *)pgd_pte; - - if (machdep->flags & CPU_BOOKE) - page_table = page_middle + (BTOP(vaddr) & (PTRS_PER_PTE - 1)); - else { - page_table = (ulong *)((pgd_pte & (ulong)machdep->pagemask) + machdep->kvbase); - page_table += ((ulong)BTOP(vaddr) & (PTRS_PER_PTE-1)); - } - - if (verbose) - fprintf(fp, " PMD: %lx => %lx\n",(ulong)page_middle, - (ulong)page_table); - - FILL_PTBL(PAGEBASE(page_table), KVADDR, PAGESIZE()); - pte = ULONG(machdep->ptbl + PAGEOFFSET(page_table)); - - if (verbose) - fprintf(fp, " PTE: %lx => %lx\n", (ulong)page_table, pte); - - if (!(pte & _PAGE_PRESENT)) { - *paddr = pte; - if (pte && verbose) { - fprintf(fp, "\n"); - ppc_translate_pte(pte, 0, 0); - } - goto no_upage; - } - - if (!pte) - goto no_upage; - - *paddr = PAGEBASE(pte) + PAGEOFFSET(vaddr); - - if (verbose) { - fprintf(fp, " PAGE: %lx\n\n", PAGEBASE(pte)); - ppc_translate_pte(pte, 0, 0); - } - - return TRUE; - -no_upage: - return FALSE; + return ppc_pgd_vtop(pgd, vaddr, paddr, verbose); } /* @@ -382,11 +385,6 @@ static int ppc_kvtop(struct task_context *tc, ulong kvaddr, physaddr_t *paddr, int verbose) { ulong *pgd; - ulong *page_dir; - ulong *page_middle; - ulong *page_table; - ulong pgd_pte; - ulong pte; if (!IS_KVADDR(kvaddr)) return FALSE; @@ -403,59 +401,7 @@ ppc_kvtop(struct task_context *tc, ulong kvaddr, physaddr_t *paddr, int verbose) } pgd = (ulong *)vt->kernel_pgd[0]; - - if (verbose) - fprintf(fp, "PAGE DIRECTORY: %lx\n", (ulong)pgd); - - page_dir = pgd + (kvaddr >> PGDIR_SHIFT); - - FILL_PGD(PAGEBASE(pgd), KVADDR, PAGESIZE()); - pgd_pte = ULONG(machdep->pgd + PAGEOFFSET(page_dir)); - - if (verbose) - fprintf(fp, " PGD: %lx => %lx\n", (ulong)page_dir, pgd_pte); - - if (!pgd_pte) - goto no_kpage; - - page_middle = (ulong *)pgd_pte; - - if (machdep->flags & CPU_BOOKE) - page_table = page_middle + (BTOP(kvaddr) & (PTRS_PER_PTE - 1)); - else { - page_table = (ulong *)((pgd_pte & (ulong)machdep->pagemask) + machdep->kvbase); - page_table += ((ulong)BTOP(kvaddr) & (PTRS_PER_PTE-1)); - } - - if (verbose) - fprintf(fp, " PMD: %lx => %lx\n", (ulong)page_middle, - (ulong)page_table); - - FILL_PTBL(PAGEBASE(page_table), KVADDR, PAGESIZE()); - pte = ULONG(machdep->ptbl + PAGEOFFSET(page_table)); - - if (verbose) - fprintf(fp, " PTE: %lx => %lx\n", (ulong)page_table, pte); - - if (!(pte & _PAGE_PRESENT)) { - if (pte && verbose) { - fprintf(fp, "\n"); - ppc_translate_pte(pte, 0, 0); - } - goto no_kpage; - } - - if (verbose) { - fprintf(fp, " PAGE: %lx\n\n", PAGEBASE(pte)); - ppc_translate_pte(pte, 0, 0); - } - - *paddr = PAGEBASE(pte) + PAGEOFFSET(kvaddr); - - return TRUE; - -no_kpage: - return FALSE; + return ppc_pgd_vtop(pgd, kvaddr, paddr, verbose); } /*