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ARM: shmobile: Add SCU boot function using argument

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Add a shmoible_boot_scu function that assumes that the base address
of the SCU is passed in r0. This code is free from inline virtual
to physical address conversion.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
This commit is contained in:
Magnus Damm 2013-06-10 18:19:46 +09:00 committed by Simon Horman
parent ebe72ab90a
commit bfabbcc679
2 changed files with 14 additions and 0 deletions
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13
arch/arm/mach-shmobile/headsmp-scu.S
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@ -51,6 +51,19 @@ ENTRY(shmobile_secondary_vector_scu)
2: .long shmobile_scu_base - PAGE_OFFSET + PLAT_PHYS_OFFSET
ENDPROC(shmobile_secondary_vector_scu)
ENTRY(shmobile_boot_scu)
@ r0 = SCU base address
mrc p15, 0, r1, c0, c0, 5 @ read MIPDR
and r1, r1, #3 @ mask out cpu ID
lsl r1, r1, #3 @ we will shift by cpu_id * 8 bits
ldr r2, [r0, #8] @ SCU Power Status Register
mov r3, #3
bic r2, r2, r3, lsl r1 @ Clear bits of our CPU (Run Mode)
str r2, [r0, #8] @ write back
b shmobile_invalidate_start
ENDPROC(shmobile_boot_scu)
.text
.globl shmobile_scu_base
shmobile_scu_base:

1
arch/arm/mach-shmobile/include/mach/common.h
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@ -11,6 +11,7 @@ extern void shmobile_boot_vector(void);
extern unsigned long shmobile_boot_fn;
extern unsigned long shmobile_boot_arg;
extern void shmobile_secondary_vector_scu(void);
extern void shmobile_boot_scu(void);
struct clk;
extern int shmobile_clk_init(void);
extern void shmobile_handle_irq_intc(struct pt_regs *);