diff options
| author | Magnus Damm <damm@opensource.se> | 2013-06-10 11:19:46 +0200 |
|---|---|---|
| committer | Simon Horman <horms+renesas@verge.net.au> | 2013-06-17 09:07:27 +0200 |
| commit | bfabbcc679e86cfcaf0e7fd41563f14c29bc74d4 (patch) | |
| tree | cc0c11759322852c170aea7563624006ee6770c2 /arch/arm/mach-shmobile/headsmp-scu.S | |
| parent | ARM: shmobile: Add SMP boot function and argument (diff) | |
| download | linux-bfabbcc679e86cfcaf0e7fd41563f14c29bc74d4.tar.xz linux-bfabbcc679e86cfcaf0e7fd41563f14c29bc74d4.zip | |
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 <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Diffstat (limited to 'arch/arm/mach-shmobile/headsmp-scu.S')
| -rw-r--r-- | arch/arm/mach-shmobile/headsmp-scu.S | 13 |
1 files changed, 13 insertions, 0 deletions
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: |