diff options
| author | George G. Davis <davis_g@com.rmk.(none)> | 2004-12-17 22:13:33 +0000 |
|---|---|---|
| committer | Russell King <rmk@flint.arm.linux.org.uk> | 2004-12-17 22:13:33 +0000 |
| commit | d8ed15fb707bf7c1f191a1977fcd4e9913cb35d0 (patch) | |
| tree | c619bb8ea38ce7637cc700167b2cc5617784d797 | |
| parent | 76fda6505c0a348b9162d5be18cf465f1bcd7f08 (diff) | |
[ARM PATCH] 2318/1: Enable access to ARMv6 VFP coprocessr
Patch from George G. Davis
Turn on ARMv6 VFP copressor, if present. According to the ARM1136 TRM,
setting CACR bits will be ignored if the coprocessor is not present. In
that case, this is change has no effect.
Signed-off-by: George G. Davis
Signed-off-by: Russell King
| -rw-r--r-- | arch/arm/mm/proc-v6.S | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm/mm/proc-v6.S b/arch/arm/mm/proc-v6.S index 166a94e861c9..fa3a5dd42a71 100644 --- a/arch/arm/mm/proc-v6.S +++ b/arch/arm/mm/proc-v6.S @@ -201,6 +201,11 @@ __v6_setup: mov r10, #0x1f @ domains 0, 1 = manager mcr p15, 0, r10, c3, c0, 0 @ load domain access register mrc p15, 0, r0, c1, c0, 0 @ read control register +#ifdef CONFIG_VFP + mrc p15, 0, r10, c1, c0, 2 + orr r10, r10, #(3 << 20) + mcr p15, 0, r10, c1, c0, 2 @ Enable full access to VFP +#endif ldr r10, cr1_clear @ get mask for bits to clear bic r0, r0, r10 @ clear bits them ldr r10, cr1_set @ get mask for bits to set |