diff options
| author | David Daney <ddaney@caviumnetworks.com> | 2008-10-23 17:56:35 -0700 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2008-10-30 14:44:33 +0000 |
| commit | 566f74f6b2f8b85d5b8d6caaf97e5672cecd3e3e (patch) | |
| tree | 4f6c7d97bae81c7ce48daaa6c0ce55ef72fb5561 /arch/mips/kernel/traps.c | |
| parent | 4816227b54d2366cba785e6f3b9f81495b83a5f1 (diff) | |
| download | linux-566f74f6b2f8b85d5b8d6caaf97e5672cecd3e3e.tar.bz2 | |
MIPS: Consider value of c0_ebase when computing value of exception base.
It just so happens to be zero on all currently supported systems so this
hasn't bitten yet ...
[Ralf: Original patch from Cavium; handling of set_uncached_handler() and
de-ifdef'ed trap_init() implementation by me.]
Signed-off-by: Tomaso Paoletti <tpaoletti@caviumnetworks.com>
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/traps.c')
| -rw-r--r-- | arch/mips/kernel/traps.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index 80b9e070c207..3f6de76d485d 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -1555,6 +1555,8 @@ void __cpuinit set_uncached_handler(unsigned long offset, void *addr, #ifdef CONFIG_64BIT unsigned long uncached_ebase = TO_UNCAC(ebase); #endif + if (cpu_has_mips_r2) + ebase += (read_c0_ebase() & 0x3ffff000); if (!addr) panic(panic_null_cerr); @@ -1588,8 +1590,11 @@ void __init trap_init(void) if (cpu_has_veic || cpu_has_vint) ebase = (unsigned long) alloc_bootmem_low_pages(0x200 + VECTORSPACING*64); - else + else { ebase = CAC_BASE; + if (cpu_has_mips_r2) + ebase += (read_c0_ebase() & 0x3ffff000); + } per_cpu_trap_init(); @@ -1697,11 +1702,11 @@ void __init trap_init(void) if (cpu_has_vce) /* Special exception: R4[04]00 uses also the divec space. */ - memcpy((void *)(CAC_BASE + 0x180), &except_vec3_r4000, 0x100); + memcpy((void *)(ebase + 0x180), &except_vec3_r4000, 0x100); else if (cpu_has_4kex) - memcpy((void *)(CAC_BASE + 0x180), &except_vec3_generic, 0x80); + memcpy((void *)(ebase + 0x180), &except_vec3_generic, 0x80); else - memcpy((void *)(CAC_BASE + 0x080), &except_vec3_generic, 0x80); + memcpy((void *)(ebase + 0x080), &except_vec3_generic, 0x80); signal_init(); #ifdef CONFIG_MIPS32_COMPAT |