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| author | Hyok S. Choi <hyok.choi@samsung.com> | 2006-09-28 12:46:34 (GMT) |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2006-09-28 19:17:30 (GMT) |
| commit | 6afd6fae1d5f7e7129a10c4f3e32018966eeac1c (patch) | |
| tree | 4b7470f0f771c4e97b18f83db0bd4ca3d529684b /arch/arm/kernel/head-nommu.S | |
| parent | 0f45d7f36b766cb668cebfb5d4d2f67b4a8676ba (diff) | |
| download | linux-6afd6fae1d5f7e7129a10c4f3e32018966eeac1c.tar.xz | |
[ARM] nommu: confirms the CR_V bit in nommu mode
In nommu mode, the exception vector location depends on the platforms.
Some of the implementations may have some special exception control
forwarding method in their ROM/flash and for some of them has its own
re-mapping mechanism by the h/w.
This patch introduces a special configuration CONFIG_CPU_HIGH_VECTOR which
turns on the CR_V bit in nommu mode. The CR_V bit is turned off by default.
This feature depends on CP15 and does not supported by ARM740.
Signed-off-by: Hyok S. Choi <hyok.choi@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/kernel/head-nommu.S')
| -rw-r--r-- | arch/arm/kernel/head-nommu.S | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm/kernel/head-nommu.S b/arch/arm/kernel/head-nommu.S index 698a537..f359a18 100644 --- a/arch/arm/kernel/head-nommu.S +++ b/arch/arm/kernel/head-nommu.S @@ -77,6 +77,11 @@ __after_proc_init: #ifdef CONFIG_CPU_ICACHE_DISABLE bic r0, r0, #CR_I #endif +#ifdef CONFIG_CPU_HIGH_VECTOR + orr r0, r0, #CR_V +#else + bic r0, r0, #CR_V +#endif mcr p15, 0, r0, c1, c0, 0 @ write control reg #endif /* CONFIG_CPU_CP15 */ |