From bfabbcc679e86cfcaf0e7fd41563f14c29bc74d4 Mon Sep 17 00:00:00 2001 From: Magnus Damm Date: Mon, 10 Jun 2013 18:19:46 +0900 Subject: [PATCH] ARM: shmobile: Add SCU boot function using argument 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 Signed-off-by: Simon Horman --- arch/arm/mach-shmobile/headsmp-scu.S | 13 +++++++++++++ arch/arm/mach-shmobile/include/mach/common.h | 1 + 2 files changed, 14 insertions(+) diff --git a/arch/arm/mach-shmobile/headsmp-scu.S b/arch/arm/mach-shmobile/headsmp-scu.S index 7d113f898e7f..c5c9106bf6c4 100644 --- a/arch/arm/mach-shmobile/headsmp-scu.S +++ b/arch/arm/mach-shmobile/headsmp-scu.S @@ -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: diff --git a/arch/arm/mach-shmobile/include/mach/common.h b/arch/arm/mach-shmobile/include/mach/common.h index 54472ef4a270..8ef1c3c13ea8 100644 --- a/arch/arm/mach-shmobile/include/mach/common.h +++ b/arch/arm/mach-shmobile/include/mach/common.h @@ -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 *); -- 2.20.1