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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>
This commit is contained in:
David Daney 2008-10-23 17:56:35 -07:00 committed by Ralf Baechle
parent 4816227b54
commit 566f74f6b2
1 changed files with 9 additions and 4 deletions
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13
arch/mips/kernel/traps.c
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@ -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