diff options
| -rw-r--r-- | arch/sparc64/kernel/entry.S | 39 | ||||
| -rw-r--r-- | include/asm-sparc64/pgtable.h | 20 |
2 files changed, 30 insertions, 29 deletions
diff --git a/arch/sparc64/kernel/entry.S b/arch/sparc64/kernel/entry.S index 3e0badb820c5..b48349527853 100644 --- a/arch/sparc64/kernel/entry.S +++ b/arch/sparc64/kernel/entry.S @@ -42,19 +42,15 @@ * executing (see inherit_locked_prom_mappings() rant). */ sparc64_vpte_nucleus: - /* Load 0xf0000000, which is LOW_OBP_ADDRESS. */ - mov 0xf, %g5 - sllx %g5, 28, %g5 - - /* Is addr >= LOW_OBP_ADDRESS? */ + /* Note that kvmap below has verified that the address is + * in the range MODULES_VADDR --> VMALLOC_END already. So + * here we need only check if it is an OBP address or not. + */ + sethi %hi(LOW_OBP_ADDRESS), %g5 cmp %g4, %g5 blu,pn %xcc, sparc64_vpte_patchme1 mov 0x1, %g5 - - /* Load 0x100000000, which is HI_OBP_ADDRESS. */ sllx %g5, 32, %g5 - - /* Is addr < HI_OBP_ADDRESS? */ cmp %g4, %g5 blu,pn %xcc, obp_iaddr_patch nop @@ -156,26 +152,29 @@ obp_daddr_patch: * rather, use information saved during inherit_prom_mappings() using 8k * pagesize. */ + .align 32 kvmap: - /* Load 0xf0000000, which is LOW_OBP_ADDRESS. */ - mov 0xf, %g5 - sllx %g5, 28, %g5 + sethi %hi(MODULES_VADDR), %g5 + cmp %g4, %g5 + blu,pn %xcc, longpath + mov (VMALLOC_END >> 24), %g5 + sllx %g5, 24, %g5 + cmp %g4, %g5 + bgeu,pn %xcc, longpath + nop - /* Is addr >= LOW_OBP_ADDRESS? */ +kvmap_check_obp: + sethi %hi(LOW_OBP_ADDRESS), %g5 cmp %g4, %g5 - blu,pn %xcc, vmalloc_addr + blu,pn %xcc, kvmap_vmalloc_addr mov 0x1, %g5 - - /* Load 0x100000000, which is HI_OBP_ADDRESS. */ sllx %g5, 32, %g5 - - /* Is addr < HI_OBP_ADDRESS? */ cmp %g4, %g5 blu,pn %xcc, obp_daddr_patch nop -vmalloc_addr: - /* If we get here, a vmalloc addr accessed, load kernel VPTE. */ +kvmap_vmalloc_addr: + /* If we get here, a vmalloc addr was accessed, load kernel VPTE. */ ldxa [%g3 + %g6] ASI_N, %g5 brgez,pn %g5, longpath nop diff --git a/include/asm-sparc64/pgtable.h b/include/asm-sparc64/pgtable.h index a2b4f5ed4625..a297f6144f0f 100644 --- a/include/asm-sparc64/pgtable.h +++ b/include/asm-sparc64/pgtable.h @@ -24,21 +24,23 @@ #include <asm/processor.h> #include <asm/const.h> -/* The kernel image occupies 0x4000000 to 0x1000000 (4MB --> 16MB). - * The page copy blockops use 0x1000000 to 0x18000000 (16MB --> 24MB). +/* The kernel image occupies 0x4000000 to 0x1000000 (4MB --> 32MB). + * The page copy blockops can use 0x2000000 to 0x10000000. * The PROM resides in an area spanning 0xf0000000 to 0x100000000. - * The vmalloc area spans 0x140000000 to 0x200000000. + * The vmalloc area spans 0x100000000 to 0x200000000. + * Since modules need to be in the lowest 32-bits of the address space, + * we place them right before the OBP area from 0x10000000 to 0xf0000000. * There is a single static kernel PMD which maps from 0x0 to address * 0x400000000. */ -#define TLBTEMP_BASE _AC(0x0000000001000000,UL) -#define MODULES_VADDR _AC(0x0000000002000000,UL) -#define MODULES_LEN _AC(0x000000007e000000,UL) -#define MODULES_END _AC(0x0000000080000000,UL) -#define VMALLOC_START _AC(0x0000000140000000,UL) -#define VMALLOC_END _AC(0x0000000200000000,UL) +#define TLBTEMP_BASE _AC(0x0000000002000000,UL) +#define MODULES_VADDR _AC(0x0000000010000000,UL) +#define MODULES_LEN _AC(0x00000000e0000000,UL) +#define MODULES_END _AC(0x00000000f0000000,UL) #define LOW_OBP_ADDRESS _AC(0x00000000f0000000,UL) #define HI_OBP_ADDRESS _AC(0x0000000100000000,UL) +#define VMALLOC_START _AC(0x0000000100000000,UL) +#define VMALLOC_END _AC(0x0000000200000000,UL) /* XXX All of this needs to be rethought so we can take advantage * XXX cheetah's full 64-bit virtual address space, ie. no more hole |