diff options
Diffstat (limited to 'arch/powerpc/kernel/prom.c')
| -rw-r--r-- | arch/powerpc/kernel/prom.c | 107 |
1 files changed, 79 insertions, 28 deletions
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index fa0ad8aafbcc..668aa4791fd7 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -33,6 +33,7 @@ #include <linux/irq.h> #include <linux/memblock.h> #include <linux/of.h> +#include <linux/of_fdt.h> #include <asm/prom.h> #include <asm/rtas.h> @@ -346,45 +347,45 @@ static int __init early_init_dt_scan_cpus(unsigned long node, #endif } - if (found >= 0) { - DBG("boot cpu: logical %d physical %d\n", found, - be32_to_cpu(intserv[found_thread])); - boot_cpuid = found; - set_hard_smp_processor_id(found, - be32_to_cpu(intserv[found_thread])); + /* Not the boot CPU */ + if (found < 0) + return 0; - /* - * PAPR defines "logical" PVR values for cpus that - * meet various levels of the architecture: - * 0x0f000001 Architecture version 2.04 - * 0x0f000002 Architecture version 2.05 - * If the cpu-version property in the cpu node contains - * such a value, we call identify_cpu again with the - * logical PVR value in order to use the cpu feature - * bits appropriate for the architecture level. - * - * A POWER6 partition in "POWER6 architected" mode - * uses the 0x0f000002 PVR value; in POWER5+ mode - * it uses 0x0f000001. - */ - prop = of_get_flat_dt_prop(node, "cpu-version", NULL); - if (prop && (be32_to_cpup(prop) & 0xff000000) == 0x0f000000) - identify_cpu(0, be32_to_cpup(prop)); + DBG("boot cpu: logical %d physical %d\n", found, + be32_to_cpu(intserv[found_thread])); + boot_cpuid = found; + set_hard_smp_processor_id(found, be32_to_cpu(intserv[found_thread])); - identical_pvr_fixup(node); - } + /* + * PAPR defines "logical" PVR values for cpus that + * meet various levels of the architecture: + * 0x0f000001 Architecture version 2.04 + * 0x0f000002 Architecture version 2.05 + * If the cpu-version property in the cpu node contains + * such a value, we call identify_cpu again with the + * logical PVR value in order to use the cpu feature + * bits appropriate for the architecture level. + * + * A POWER6 partition in "POWER6 architected" mode + * uses the 0x0f000002 PVR value; in POWER5+ mode + * it uses 0x0f000001. + */ + prop = of_get_flat_dt_prop(node, "cpu-version", NULL); + if (prop && (be32_to_cpup(prop) & 0xff000000) == 0x0f000000) + identify_cpu(0, be32_to_cpup(prop)); + + identical_pvr_fixup(node); check_cpu_feature_properties(node); check_cpu_pa_features(node); check_cpu_slb_size(node); -#ifdef CONFIG_PPC_PSERIES +#ifdef CONFIG_PPC64 if (nthreads > 1) cur_cpu_spec->cpu_features |= CPU_FTR_SMT; else cur_cpu_spec->cpu_features &= ~CPU_FTR_SMT; #endif - return 0; } @@ -523,6 +524,20 @@ static int __init early_init_dt_scan_memory_ppc(unsigned long node, return early_init_dt_scan_memory(node, uname, depth, data); } +/* + * For a relocatable kernel, we need to get the memstart_addr first, + * then use it to calculate the virtual kernel start address. This has + * to happen at a very early stage (before machine_init). In this case, + * we just want to get the memstart_address and would not like to mess the + * memblock at this stage. So introduce a variable to skip the memblock_add() + * for this reason. + */ +#ifdef CONFIG_RELOCATABLE +static int add_mem_to_memblock = 1; +#else +#define add_mem_to_memblock 1 +#endif + void __init early_init_dt_add_memory_arch(u64 base, u64 size) { #ifdef CONFIG_PPC64 @@ -543,7 +558,8 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size) } /* Add the chunk to the MEMBLOCK list */ - memblock_add(base, size); + if (add_mem_to_memblock) + memblock_add(base, size); } static void __init early_reserve_mem_dt(void) @@ -573,6 +589,8 @@ static void __init early_reserve_mem_dt(void) memblock_reserve(base, size); } } + + early_init_fdt_scan_reserved_mem(); } static void __init early_reserve_mem(void) @@ -729,6 +747,10 @@ void __init early_init_devtree(void *params) * (altivec support, boot CPU ID, ...) */ of_scan_flat_dt(early_init_dt_scan_cpus, NULL); + if (boot_cpuid < 0) { + printk("Failed to indentify boot CPU !\n"); + BUG(); + } #if defined(CONFIG_SMP) && defined(CONFIG_PPC64) /* We'll later wait for secondaries to check in; there are @@ -737,9 +759,38 @@ void __init early_init_devtree(void *params) spinning_secondaries = boot_cpu_count - 1; #endif +#ifdef CONFIG_PPC_POWERNV + /* Scan and build the list of machine check recoverable ranges */ + of_scan_flat_dt(early_init_dt_scan_recoverable_ranges, NULL); +#endif + DBG(" <- early_init_devtree()\n"); } +#ifdef CONFIG_RELOCATABLE +/* + * This function run before early_init_devtree, so we have to init + * initial_boot_params. + */ +void __init early_get_first_memblock_info(void *params, phys_addr_t *size) +{ + /* Setup flat device-tree pointer */ + initial_boot_params = params; + + /* + * Scan the memory nodes and set add_mem_to_memblock to 0 to avoid + * mess the memblock. + */ + add_mem_to_memblock = 0; + of_scan_flat_dt(early_init_dt_scan_root, NULL); + of_scan_flat_dt(early_init_dt_scan_memory_ppc, NULL); + add_mem_to_memblock = 1; + + if (size) + *size = first_memblock_size; +} +#endif + /******* * * New implementation of the OF "find" APIs, return a refcounted |