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 | PMD | PAGE_OFFSET |
-----------------------------------
Also the physical address is 64bit.
Signed-off-by: Suzuki K. Poulose <suzuki@xxxxxxxxxx>
---
defs.h | 5 +++++
ppc.c | 19 +++++++++++++++++++
2 files changed, 24 insertions(+), 0 deletions(-)
diff --git a/defs.h b/defs.h
index 603a583..094a442 100755
--- a/defs.h
+++ b/defs.h
@@ -2647,6 +2647,11 @@ 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)
#define PGDIR_SHIFT (base_platform.pgdir_shift)
#define PTRS_PER_PTE (base_platform.ptrs_per_pte)
diff --git a/ppc.c b/ppc.c
index 0e934ca..b36bffc 100755
--- a/ppc.c
+++ b/ppc.c
@@ -82,17 +82,36 @@ static void ppc_display_machine_stats(void);
static void ppc_dump_line_number(ulong);
static struct line_number_hook ppc_line_number_hooks[];
+static int probe_ppc44x_platform(char *, struct platform *);
static int probe_default_platform(char *, struct platform *);
static void ppc_probe_base_platform(void);
typedef int (*probe_func_t) (char *, struct platform *);
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 platform *p)
+{
+ /* 44x include ppc440* and ppc470 */
+ if (STRNEQ(name, "ppc440") || STREQ(name, "ppc470")) {
+ p->pgdir_shift = PPC44x_PGDIR_SHIFT;
+ p->ptrs_per_pgd = PPC44x_PTRS_PER_PGD;
+ p->ptrs_per_pte = PPC44x_PTRS_PER_PTE;
+ p->pte_size = PPC44x_PTE_SIZE;
+ p->name = strdup(name);
+
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+static int
probe_default_platform(char *name, struct platform *p)
{
/* Use the default definitions */
--
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