diff options
| author | Kanoj Sarcar <kanoj@engr.sgi.com> | 2000-06-08 21:07:10 +0000 |
|---|---|---|
| committer | Kanoj Sarcar <kanoj@engr.sgi.com> | 2000-06-08 21:07:10 +0000 |
| commit | 77a06fc1bcf4ac35e479b727ce1e0408268bac1c (patch) | |
| tree | 76e225e64955f1dadacbb85ce1386d6f44306207 /arch/mips64 | |
| parent | db58dfc0da59f473f9f4f79802d524d884f0dd2f (diff) | |
Step one of trying to remove the assumption that nasid 0 is present
from the mapped kernel code.
Diffstat (limited to 'arch/mips64')
| -rw-r--r-- | arch/mips64/kernel/head.S | 36 |
1 files changed, 33 insertions, 3 deletions
diff --git a/arch/mips64/kernel/head.S b/arch/mips64/kernel/head.S index ebdcaa2fc..663348cc8 100644 --- a/arch/mips64/kernel/head.S +++ b/arch/mips64/kernel/head.S @@ -19,9 +19,11 @@ #include <asm/mipsregs.h> #include <asm/stackframe.h> #include <asm/pgtable.h> +#include <asm/sn/addrs.h> +#include <asm/sn/sn0/hubni.h> .macro ARC64_TWIDDLE_PC -#ifdef CONFIG_ARC64 +#if defined(CONFIG_ARC64) || defined(CONFIG_MAPPED_KERNEL) /* We get launched at a XKPHYS address but the kernel is linked to run at a KSEG0 address, so jump there. */ la t0, \@f @@ -30,6 +32,19 @@ #endif .endm + /* + * outputs the local nasid into t1. + */ + .macro GET_NASID_ASM + dli t1, LOCAL_HUB_ADDR(NI_STATUS_REV_ID) + ld t1, (t1) + and t1, NSRI_NODEID_MASK + dsrl t1, NSRI_NODEID_SHFT + .endm + + /* + * inputs are the text nasid in t1, data nasid in t2. + */ .macro MAPPED_KERNEL_SETUP_TLB #ifdef CONFIG_MAPPED_KERNEL /* @@ -39,10 +54,19 @@ */ 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, t1, t0 # Physical load address of kernel data + dsrl t1, 6 # Put physical address into place + dsrl t2, 6 # Put physical address into place li t0, ((_PAGE_GLOBAL|_PAGE_VALID| _CACHE_CACHABLE_COW) >> 6) - mtc0 t0, CP0_ENTRYLO0 # physaddr 0, VG, cach exlwr + or t0, t0, t1 + mtc0 t0, CP0_ENTRYLO0 # physaddr, VG, cach exlwr li t0, ((_PAGE_GLOBAL|_PAGE_VALID| _PAGE_DIRTY|_CACHE_CACHABLE_COW) >> 6) - mtc0 t0, CP0_ENTRYLO1 # physaddr 0, DVG, cach exlwr + 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 @@ -67,6 +91,9 @@ NESTED(kernel_entry, 16, sp) # kernel entry point ori sp, 0xf # align stack on 16 byte. xori sp, 0xf + GET_NASID_ASM + move t2, t1 # text and data are here +1: bne t1, zero, 1b MAPPED_KERNEL_SETUP_TLB ARC64_TWIDDLE_PC @@ -103,6 +130,9 @@ NESTED(kernel_entry, 16, sp) # kernel entry point END(kernel_entry) NESTED(bootstrap, 16, sp) + GET_NASID_ASM + move t1, zero # till we know who is master + move t2, zero # till we know who is master MAPPED_KERNEL_SETUP_TLB ARC64_TWIDDLE_PC CLI |