From: Michael Ellerman Date: Fri, 23 Jun 2006 08:20:09 +0000 (+1000) Subject: [POWERPC] Setup the boot cpu's paca pointer in C rather than asm X-Git-Tag: firefly_0821_release~34735^2~30 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4ba99b97dadd35b9ce1438b2bc7c992a4a14a8b1;p=firefly-linux-kernel-4.4.55.git [POWERPC] Setup the boot cpu's paca pointer in C rather than asm There's no need to set the boot cpu paca in asm, so do it in C so us mere mortals can understand it. Signed-off-by: Michael Ellerman Signed-off-by: Paul Mackerras --- diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S index be5560a2e441..da0924293496 100644 --- a/arch/powerpc/kernel/head_64.S +++ b/arch/powerpc/kernel/head_64.S @@ -1976,17 +1976,6 @@ _STATIC(start_here_common) /* Not reached */ BUG_OPCODE -/* Put the paca pointer into r13 and SPRG3 */ -_GLOBAL(setup_boot_paca) - LOAD_REG_IMMEDIATE(r3, boot_cpuid) - lwz r3,0(r3) - LOAD_REG_IMMEDIATE(r4, paca) /* Get base vaddr of paca array */ - mulli r3,r3,PACA_SIZE /* Calculate vaddr of right paca */ - add r13,r3,r4 /* for this processor. */ - mtspr SPRN_SPRG3,r13 - - blr - /* * We put a few things here that have to be page-aligned. * This stuff goes at the beginning of the bss, which is page-aligned. diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index cc26530145db..a2fb2e627aad 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -149,6 +149,13 @@ early_param("smt-enabled", early_smt_enabled); #define check_smt_enabled() #endif /* CONFIG_SMP */ +/* Put the paca pointer into r13 and SPRG3 */ +void __init setup_paca(int cpu) +{ + local_paca = &paca[cpu]; + mtspr(SPRN_SPRG3, local_paca); +} + /* * Early initialization entry point. This is called by head.S * with MMU translation disabled. We rely on the "feature" of @@ -183,7 +190,7 @@ void __init early_setup(unsigned long dt_ptr) early_init_devtree(__va(dt_ptr)); /* Now we know the logical id of our boot cpu, setup the paca. */ - setup_boot_paca(); + setup_paca(boot_cpuid); /* Fix up paca fields required for the boot cpu */ get_paca()->cpu_start = 1;