From: Mans Rullgard mans@mansr.com
This function consists entirely of inline asm statements, so writing it directly in a .S file is simpler. Additionally, the inline asm is not safe as is, since registers are not guaranteed to be preserved between asm() statements.
Signed-off-by: Mans Rullgard mans@mansr.com Signed-off-by: Steve Sakoman steve@sakoman.com --- arch/arm/cpu/armv7/omap3/board.c | 35 ----------------------------------- arch/arm/cpu/armv7/omap3/cache.S | 19 +++++++++++++++++++ 2 files changed, 19 insertions(+), 35 deletions(-)
diff --git a/arch/arm/cpu/armv7/omap3/board.c b/arch/arm/cpu/armv7/omap3/board.c index 69e56f5..6c2a132 100644 --- a/arch/arm/cpu/armv7/omap3/board.c +++ b/arch/arm/cpu/armv7/omap3/board.c @@ -120,41 +120,6 @@ void secureworld_exit() }
/****************************************************************************** - * Routine: setup_auxcr() - * Description: Write to AuxCR desired value using SMI. - * general use. - *****************************************************************************/ -void setup_auxcr() -{ - unsigned long i; - volatile unsigned int j; - /* Save r0, r12 and restore them after usage */ - __asm__ __volatile__("mov %0, r12":"=r"(j)); - __asm__ __volatile__("mov %0, r0":"=r"(i)); - - /* - * GP Device ROM code API usage here - * r12 = AUXCR Write function and r0 value - */ - __asm__ __volatile__("mov r12, #0x3"); - __asm__ __volatile__("mrc p15, 0, r0, c1, c0, 1"); - /* Enabling ASA */ - __asm__ __volatile__("orr r0, r0, #0x10"); - /* Enable L1NEON */ - __asm__ __volatile__("orr r0, r0, #1 << 5"); - /* SMI instruction to call ROM Code API */ - __asm__ __volatile__(".word 0xE1600070"); - /* Set PLD_FWD bit in L2AUXCR (Cortex-A8 erratum 725233 workaround) */ - __asm__ __volatile__("mov r12, #0x2"); - __asm__ __volatile__("mrc p15, 1, r0, c9, c0, 2"); - __asm__ __volatile__("orr r0, r0, #1 << 27"); - /* SMI instruction to call ROM Code API */ - __asm__ __volatile__(".word 0xE1600070"); - __asm__ __volatile__("mov r0, %0":"=r"(i)); - __asm__ __volatile__("mov r12, %0":"=r"(j)); -} - -/****************************************************************************** * Routine: try_unlock_sram() * Description: If chip is GP/EMU(special) type, unlock the SRAM for * general use. diff --git a/arch/arm/cpu/armv7/omap3/cache.S b/arch/arm/cpu/armv7/omap3/cache.S index cb7ca11..5a19051 100644 --- a/arch/arm/cpu/armv7/omap3/cache.S +++ b/arch/arm/cpu/armv7/omap3/cache.S @@ -43,6 +43,7 @@ .global invalidate_dcache .global l2_cache_enable .global l2_cache_disable +.global setup_auxcr
/* * invalidate_dcache() @@ -156,3 +157,21 @@ l2_cache_disable: mov r0, #0 b l2_cache_set
+/****************************************************************************** + * Routine: setup_auxcr() + * Description: Write to AuxCR desired value using SMI. + * general use. + *****************************************************************************/ +setup_auxcr: + mov r12, #0x3 + mrc p15, 0, r0, c1, c0, 1 + orr r0, r0, #0x10 @ Enable ASA + orr r0, r0, #1 << 5 @ Enable L1NEON + .word 0xE1600070 @ SMC + mov r12, #0x2 + mrc p15, 1, r0, c9, c0, 2 + @ Set PLD_FWD bit in L2AUXCR (Cortex-A8 erratum 725233 workaround) + orr r0, r0, #1 << 27 + .word 0xE1600070 @ SMC + bx lr +