diff options
Diffstat (limited to 'arch/mips/include/asm/mach-ip27/kernel-entry-init.h')
| -rw-r--r-- | arch/mips/include/asm/mach-ip27/kernel-entry-init.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mach-ip27/kernel-entry-init.h b/arch/mips/include/asm/mach-ip27/kernel-entry-init.h index a323efb720d..b087cb83da3 100644 --- a/arch/mips/include/asm/mach-ip27/kernel-entry-init.h +++ b/arch/mips/include/asm/mach-ip27/kernel-entry-init.h @@ -24,6 +24,53 @@ .endm /* + * TLB bits + */ +#define PAGE_GLOBAL (1 << 6) +#define PAGE_VALID (1 << 7) +#define PAGE_DIRTY (1 << 8) +#define CACHE_CACHABLE_COW (5 << 9) + + /* + * inputs are the text nasid in t1, data nasid in t2. + */ + .macro MAPPED_KERNEL_SETUP_TLB +#ifdef CONFIG_MAPPED_KERNEL + /* + * This needs to read the nasid - assume 0 for now. + * Drop in 0xffffffffc0000000 in tlbhi, 0+VG in tlblo_0, + * 0+DVG in tlblo_1. + */ + dli t0, 0xffffffffc0000000 + dmtc0 t0, CP0_ENTRYHI + li t0, 0x1c000 # Offset of text into node memory + dsll t1, NASID_SHFT # Shift text nasid into place + dsll t2, NASID_SHFT # Same for data nasid + or t1, t1, t0 # Physical load address of kernel text + or t2, t2, t0 # Physical load address of kernel data + dsrl t1, 12 # 4K pfn + dsrl t2, 12 # 4K pfn + dsll t1, 6 # Get pfn into place + dsll t2, 6 # Get pfn into place + li t0, ((PAGE_GLOBAL | PAGE_VALID | CACHE_CACHABLE_COW) >> 6) + or t0, t0, t1 + mtc0 t0, CP0_ENTRYLO0 # physaddr, VG, cach exlwr + li t0, ((PAGE_GLOBAL | PAGE_VALID | PAGE_DIRTY | CACHE_CACHABLE_COW) >> 6) + or t0, t0, t2 + mtc0 t0, CP0_ENTRYLO1 # physaddr, DVG, cach exlwr + li t0, 0x1ffe000 # MAPPED_KERN_TLBMASK, TLBPGMASK_16M + mtc0 t0, CP0_PAGEMASK + li t0, 0 # KMAP_INX + mtc0 t0, CP0_INDEX + li t0, 1 + mtc0 t0, CP0_WIRED + tlbwi +#else + mtc0 zero, CP0_WIRED +#endif + .endm + +/* * Intentionally empty macro, used in head.S. Override in * arch/mips/mach-xxx/kernel-entry-init.h when necessary. */ |