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[ARM SMP] Add Realview MPcore SMP support

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Add SMP support for the MPcore tile fitted to the Realview ARM
platform.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
2005-11-07 21:05:42 +00:00
committed by Russell King
parent fea543f477
commit 862184fe01
8 changed files with 312 additions and 0 deletions
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18
arch/arm/mm/proc-v6.S
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@ -12,6 +12,7 @@
#include <linux/linkage.h>
#include <asm/assembler.h>
#include <asm/asm-offsets.h>
#include <asm/hardware/arm_scu.h>
#include <asm/procinfo.h>
#include <asm/pgtable.h>
@ -194,6 +195,23 @@ cpu_v6_name:
* - cache type register is implemented
*/
__v6_setup:
#ifdef CONFIG_SMP
/* Set up the SCU on core 0 only */
mrc p15, 0, r0, c0, c0, 5 @ CPU core number
ands r0, r0, #15
moveq r0, #0x10000000 @ SCU_BASE
orreq r0, r0, #0x00100000
ldreq r5, [r0, #SCU_CTRL]
orreq r5, r5, #1
streq r5, [r0, #SCU_CTRL]
#ifndef CONFIG_CPU_DCACHE_DISABLE
mrc p15, 0, r0, c1, c0, 1 @ Enable SMP/nAMP mode
orr r0, r0, #0x20
mcr p15, 0, r0, c1, c0, 1
#endif
#endif
mov r0, #0
mcr p15, 0, r0, c7, c14, 0 @ clean+invalidate D cache
mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache