diff options
Diffstat (limited to 'arch/powerpc/kernel/setup_32.c')
| -rw-r--r-- | arch/powerpc/kernel/setup_32.c | 126 |
1 files changed, 40 insertions, 86 deletions
diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c index 947f904688b0..5a1bf501fbe1 100644 --- a/arch/powerpc/kernel/setup_32.c +++ b/arch/powerpc/kernel/setup_32.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Common prep/pmac/chrp boot and setup code. */ @@ -17,11 +18,13 @@ #include <linux/console.h> #include <linux/memblock.h> #include <linux/export.h> +#include <linux/nvram.h> +#include <linux/pgtable.h> +#include <linux/of_fdt.h> +#include <linux/irq.h> #include <asm/io.h> -#include <asm/prom.h> #include <asm/processor.h> -#include <asm/pgtable.h> #include <asm/setup.h> #include <asm/smp.h> #include <asm/elf.h> @@ -37,11 +40,12 @@ #include <asm/time.h> #include <asm/serial.h> #include <asm/udbg.h> -#include <asm/code-patching.h> +#include <asm/text-patching.h> #include <asm/cpu_has_feature.h> #include <asm/asm-prototypes.h> #include <asm/kdump.h> #include <asm/feature-fixups.h> +#include <asm/early_ioremap.h> #include "setup.h" @@ -55,7 +59,6 @@ EXPORT_SYMBOL_GPL(boot_cpuid_phys); int smp_hw_index[NR_CPUS]; EXPORT_SYMBOL(smp_hw_index); -unsigned long ISA_DMA_THRESHOLD; unsigned int DMA_MODE_READ; unsigned int DMA_MODE_WRITE; @@ -63,34 +66,6 @@ EXPORT_SYMBOL(DMA_MODE_READ); EXPORT_SYMBOL(DMA_MODE_WRITE); /* - * We're called here very early in the boot. - * - * Note that the kernel may be running at an address which is different - * from the address that it was linked at, so we must use RELOC/PTRRELOC - * to access static data (including strings). -- paulus - */ -notrace unsigned long __init early_init(unsigned long dt_ptr) -{ - unsigned long offset = reloc_offset(); - - /* First zero the BSS -- use memset_io, some platforms don't have - * caches on yet */ - memset_io((void __iomem *)PTRRELOC(&__bss_start), 0, - __bss_stop - __bss_start); - - /* - * Identify the CPU type and fix up code sections - * that depend on which cpu we have. - */ - identify_cpu(offset, mfspr(SPRN_PVR)); - - apply_feature_fixups(); - - return KERNELBASE + offset; -} - - -/* * This is run before start_kernel(), the kernel has been relocated * and we are running with enough of the MMU enabled to have our * proper kernel virtual addresses @@ -100,18 +75,20 @@ notrace unsigned long __init early_init(unsigned long dt_ptr) */ notrace void __init machine_init(u64 dt_ptr) { - unsigned int *addr = (unsigned int *)patch_site_addr(&patch__memset_nocache); - unsigned long insn; + u32 *addr = (u32 *)patch_site_addr(&patch__memset_nocache); + ppc_inst_t insn; /* Configure static keys first, now that we're relocated. */ setup_feature_keys(); + early_ioremap_init(); + /* Enable early debugging if any specified (see udbg.h) */ udbg_early_init(); - patch_instruction_site(&patch__memcpy_nocache, PPC_INST_NOP); + patch_instruction_site(&patch__memcpy_nocache, ppc_inst(PPC_RAW_NOP())); - insn = create_cond_branch(addr, branch_target(addr), 0x820000); + create_cond_branch(&insn, addr, branch_target(addr), 0x820000); patch_instruction(addr, insn); /* replace b by bne cr0 */ /* Do some early initialization based on the flat device tree */ @@ -147,41 +124,6 @@ static int __init ppc_setup_l3cr(char *str) } __setup("l3cr=", ppc_setup_l3cr); -#ifdef CONFIG_GENERIC_NVRAM - -/* Generic nvram hooks used by drivers/char/gen_nvram.c */ -unsigned char nvram_read_byte(int addr) -{ - if (ppc_md.nvram_read_val) - return ppc_md.nvram_read_val(addr); - return 0xff; -} -EXPORT_SYMBOL(nvram_read_byte); - -void nvram_write_byte(unsigned char val, int addr) -{ - if (ppc_md.nvram_write_val) - ppc_md.nvram_write_val(addr, val); -} -EXPORT_SYMBOL(nvram_write_byte); - -ssize_t nvram_get_size(void) -{ - if (ppc_md.nvram_size) - return ppc_md.nvram_size(); - return -1; -} -EXPORT_SYMBOL(nvram_get_size); - -void nvram_sync(void) -{ - if (ppc_md.nvram_sync) - ppc_md.nvram_sync(); -} -EXPORT_SYMBOL(nvram_sync); - -#endif /* CONFIG_NVRAM */ - static int __init ppc_init(void) { /* clear the progress line */ @@ -196,21 +138,39 @@ static int __init ppc_init(void) } arch_initcall(ppc_init); +static void *__init alloc_stack(void) +{ + return memblock_alloc_or_panic(THREAD_SIZE, THREAD_ALIGN); +} + void __init irqstack_early_init(void) { unsigned int i; + if (IS_ENABLED(CONFIG_VMAP_STACK)) + return; + /* interrupt stacks must be in lowmem, we get that for free on ppc32 * as the memblock is limited to lowmem by default */ for_each_possible_cpu(i) { - softirq_ctx[i] = (struct thread_info *) - __va(memblock_phys_alloc(THREAD_SIZE, THREAD_SIZE)); - hardirq_ctx[i] = (struct thread_info *) - __va(memblock_phys_alloc(THREAD_SIZE, THREAD_SIZE)); + softirq_ctx[i] = alloc_stack(); + hardirq_ctx[i] = alloc_stack(); } } -#if defined(CONFIG_BOOKE) || defined(CONFIG_40x) +#ifdef CONFIG_VMAP_STACK +void *emergency_ctx[NR_CPUS] __ro_after_init = {[0] = &init_stack}; + +void __init emergency_stack_init(void) +{ + unsigned int i; + + for_each_possible_cpu(i) + emergency_ctx[i] = alloc_stack(); +} +#endif + +#ifdef CONFIG_BOOKE void __init exc_lvl_early_init(void) { unsigned int i, hw_cpu; @@ -224,13 +184,10 @@ void __init exc_lvl_early_init(void) hw_cpu = 0; #endif - critirq_ctx[hw_cpu] = (struct thread_info *) - __va(memblock_phys_alloc(THREAD_SIZE, THREAD_SIZE)); + critirq_ctx[hw_cpu] = alloc_stack(); #ifdef CONFIG_BOOKE - dbgirq_ctx[hw_cpu] = (struct thread_info *) - __va(memblock_phys_alloc(THREAD_SIZE, THREAD_SIZE)); - mcheckirq_ctx[hw_cpu] = (struct thread_info *) - __va(memblock_phys_alloc(THREAD_SIZE, THREAD_SIZE)); + dbgirq_ctx[hw_cpu] = alloc_stack(); + mcheckirq_ctx[hw_cpu] = alloc_stack(); #endif } } @@ -244,7 +201,7 @@ void __init setup_power_save(void) ppc_md.power_save = ppc6xx_idle; #endif -#ifdef CONFIG_E500 +#ifdef CONFIG_PPC_E500 if (cpu_has_feature(CPU_FTR_CAN_DOZE) || cpu_has_feature(CPU_FTR_CAN_NAP)) ppc_md.power_save = e500_idle; @@ -260,7 +217,4 @@ __init void initialize_cache_info(void) */ dcache_bsize = cur_cpu_spec->dcache_bsize; icache_bsize = cur_cpu_spec->icache_bsize; - ucache_bsize = 0; - if (cpu_has_feature(CPU_FTR_UNIFIED_ID_CACHE)) - ucache_bsize = icache_bsize = dcache_bsize; } |