[Crash-utility] [PATCH v4 3/4] [ppc] virtual address translation bits for PPC44x

This patch adds the definition for PPC44x virtual address translation. On ppc44x, the virtual-address is split as below : Bits |0 10|11 19|20 31| ------------------------------------- | PGD | PTE | PAGE_OFFSET | ----------------------------------- Also the physical address is 64bit. Signed-off-by: Suzuki K. Poulose <suzuki(a)in.ibm.com&gt; --- defs.h | 19 +++++++++++++++++++ ppc.c | 35 +++++++++++++++++++++++++++++++++++ 2 files changed, 54 insertions(+), 0 deletions(-) diff --git a/defs.h b/defs.h index 0c5558e..6a6011f 100755 --- a/defs.h +++ b/defs.h @@ -2654,6 +2654,12 @@ struct load_module { #define DEFAULT_PTRS_PER_PGD (1024) #define DEFAULT_PTE_SIZE sizeof(ulong) +/* PPC44x translation bits */ +#define PPC44x_PGDIR_SHIFT (21) +#define PPC44x_PTRS_PER_PTE (512) +#define PPC44x_PTRS_PER_PGD (2048) +#define PPC44x_PTE_SIZE sizeof(ulonglong) + /* PAGE flags */ #define _PAGE_PRESENT (machdep->machspec->_page_present) /* software: pte contains a translation */ #define _PAGE_USER (machdep->machspec->_page_user) /* matches one of the PP bits */ @@ -2680,6 +2686,19 @@ struct load_module { #define DEFAULT_PAGE_HWWRITE 0x200 #define DEFAULT_PAGE_SHARED 0 +/* PPC44x PAGE flags: Values from kernel asm/pte-44x.h */ +#define PPC44x_PAGE_PRESENT 0x001 +#define PPC44x_PAGE_RW 0x002 +#define PPC44x_PAGE_ACCESSED 0x008 +#define PPC44x_PAGE_DIRTY 0x010 +#define PPC44x_PAGE_USER 0x040 +#define PPC44x_PAGE_GUARDED 0x100 +#define PPC44x_PAGE_COHERENT 0x200 +#define PPC44x_PAGE_NO_CACHE 0x400 +#define PPC44x_PAGE_WRITETHRU 0x800 +#define PPC44x_PAGE_HWWRITE 0 +#define PPC44x_PAGE_SHARED 0 + #define SWP_TYPE(entry) (((entry) >> 1) & 0x7f) #define SWP_OFFSET(entry) ((entry) >> 8) #define __swp_type(entry) SWP_TYPE(entry) diff --git a/ppc.c b/ppc.c index 9f765b6..2cde018 100755 --- a/ppc.c +++ b/ppc.c @@ -73,16 +73,51 @@ static struct line_number_hook ppc_line_number_hooks[]; static struct machine_specific ppc_machine_specific = { 0 }; static int probe_default_platform(char *); +static int probe_ppc44x_platform(char *); static void ppc_probe_base_platform(void); typedef int (*probe_func_t) (char *); probe_func_t probe_platforms[] = { + probe_ppc44x_platform, /* 44x chipsets */ probe_default_platform, /* This should be at the end */ NULL }; static int +probe_ppc44x_platform(char *name) +{ + struct machine_specific *machspec = machdep->machspec; + + /* 44x include ppc440* and ppc470 */ + if (STRNEQ(name, "ppc440") || STREQ(name, "ppc470")) { + + machspec->platform = strdup(name); + + machspec->pgdir_shift = PPC44x_PGDIR_SHIFT; + machspec->ptrs_per_pgd = PPC44x_PTRS_PER_PGD; + machspec->ptrs_per_pte = PPC44x_PTRS_PER_PTE; + machspec->pte_size = PPC44x_PTE_SIZE; + + machspec->_page_present = PPC44x_PAGE_PRESENT; + machspec->_page_user = PPC44x_PAGE_USER; + machspec->_page_rw = PPC44x_PAGE_RW; + machspec->_page_guarded = PPC44x_PAGE_GUARDED; + machspec->_page_coherent = PPC44x_PAGE_COHERENT; + machspec->_page_no_cache = PPC44x_PAGE_NO_CACHE; + machspec->_page_writethru = PPC44x_PAGE_WRITETHRU; + machspec->_page_dirty = PPC44x_PAGE_DIRTY; + machspec->_page_accessed = PPC44x_PAGE_ACCESSED; + machspec->_page_hwwrite = PPC44x_PAGE_HWWRITE; + machspec->_page_shared = PPC44x_PAGE_SHARED; + + return TRUE; + } + + return FALSE; +} + +static int probe_default_platform(char *name) { struct machine_specific *machspec = machdep->machspec;