diff options
| -rw-r--r-- | arch/arm/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm/include/asm/Kbuild | 1 | ||||
| -rw-r--r-- | arch/arm/include/asm/fixmap.h | 29 | ||||
| -rw-r--r-- | arch/arm/kernel/setup.c | 7 | ||||
| -rw-r--r-- | arch/arm/mm/ioremap.c | 9 | ||||
| -rw-r--r-- | arch/arm/mm/mmu.c | 2 |
6 files changed, 45 insertions, 4 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 34e1569a11ee..446e49b56e6a 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -20,6 +20,7 @@ config ARM select GENERIC_ALLOCATOR select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI) select GENERIC_CLOCKEVENTS_BROADCAST if SMP + select GENERIC_EARLY_IOREMAP select GENERIC_IDLE_POLL_SETUP select GENERIC_IRQ_PROBE select GENERIC_IRQ_SHOW diff --git a/arch/arm/include/asm/Kbuild b/arch/arm/include/asm/Kbuild index bd425302c97a..16da6380eb85 100644 --- a/arch/arm/include/asm/Kbuild +++ b/arch/arm/include/asm/Kbuild @@ -3,6 +3,7 @@ generic-y += bitsperlong.h generic-y += cputime.h generic-y += current.h +generic-y += early_ioremap.h generic-y += emergency-restart.h generic-y += errno.h generic-y += exec.h diff --git a/arch/arm/include/asm/fixmap.h b/arch/arm/include/asm/fixmap.h index 58cfe9f1a687..5c17d2dec777 100644 --- a/arch/arm/include/asm/fixmap.h +++ b/arch/arm/include/asm/fixmap.h @@ -19,20 +19,47 @@ enum fixed_addresses { FIX_TEXT_POKE0, FIX_TEXT_POKE1, - __end_of_fixed_addresses + __end_of_fixmap_region, + + /* + * Share the kmap() region with early_ioremap(): this is guaranteed + * not to clash since early_ioremap() is only available before + * paging_init(), and kmap() only after. + */ +#define NR_FIX_BTMAPS 32 +#define FIX_BTMAPS_SLOTS 7 +#define TOTAL_FIX_BTMAPS (NR_FIX_BTMAPS * FIX_BTMAPS_SLOTS) + + FIX_BTMAP_END = __end_of_permanent_fixed_addresses, + FIX_BTMAP_BEGIN = FIX_BTMAP_END + TOTAL_FIX_BTMAPS - 1, + __end_of_early_ioremap_region }; +static const enum fixed_addresses __end_of_fixed_addresses = + __end_of_fixmap_region > __end_of_early_ioremap_region ? + __end_of_fixmap_region : __end_of_early_ioremap_region; + #define FIXMAP_PAGE_COMMON (L_PTE_YOUNG | L_PTE_PRESENT | L_PTE_XN | L_PTE_DIRTY) #define FIXMAP_PAGE_NORMAL (FIXMAP_PAGE_COMMON | L_PTE_MT_WRITEBACK) +#define FIXMAP_PAGE_RO (FIXMAP_PAGE_NORMAL | L_PTE_RDONLY) /* Used by set_fixmap_(io|nocache), both meant for mapping a device */ #define FIXMAP_PAGE_IO (FIXMAP_PAGE_COMMON | L_PTE_MT_DEV_SHARED | L_PTE_SHARED) #define FIXMAP_PAGE_NOCACHE FIXMAP_PAGE_IO +#define __early_set_fixmap __set_fixmap + +#ifdef CONFIG_MMU + void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot); void __init early_fixmap_init(void); #include <asm-generic/fixmap.h> +#else + +static inline void early_fixmap_init(void) { } + +#endif #endif diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index 20edd349d379..5df2bca57c42 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -38,6 +38,7 @@ #include <asm/cpu.h> #include <asm/cputype.h> #include <asm/elf.h> +#include <asm/early_ioremap.h> #include <asm/fixmap.h> #include <asm/procinfo.h> #include <asm/psci.h> @@ -956,8 +957,8 @@ void __init setup_arch(char **cmdline_p) strlcpy(cmd_line, boot_command_line, COMMAND_LINE_SIZE); *cmdline_p = cmd_line; - if (IS_ENABLED(CONFIG_FIX_EARLYCON_MEM)) - early_fixmap_init(); + early_fixmap_init(); + early_ioremap_init(); parse_early_param(); @@ -968,6 +969,8 @@ void __init setup_arch(char **cmdline_p) sanity_check_meminfo(); arm_memblock_init(mdesc); + early_ioremap_reset(); + paging_init(mdesc); request_standard_resources(mdesc); diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c index 0c81056c1dd7..66a978d05958 100644 --- a/arch/arm/mm/ioremap.c +++ b/arch/arm/mm/ioremap.c @@ -30,6 +30,7 @@ #include <asm/cp15.h> #include <asm/cputype.h> #include <asm/cacheflush.h> +#include <asm/early_ioremap.h> #include <asm/mmu_context.h> #include <asm/pgalloc.h> #include <asm/tlbflush.h> @@ -469,3 +470,11 @@ int pci_ioremap_io(unsigned int offset, phys_addr_t phys_addr) } EXPORT_SYMBOL_GPL(pci_ioremap_io); #endif + +/* + * Must be called after early_fixmap_init + */ +void __init early_ioremap_init(void) +{ + early_ioremap_setup(); +} diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index 4867f5daf82c..de19f90221e2 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -390,7 +390,7 @@ void __init early_fixmap_init(void) * The early fixmap range spans multiple pmds, for which * we are not prepared: */ - BUILD_BUG_ON((__fix_to_virt(__end_of_permanent_fixed_addresses) >> PMD_SHIFT) + BUILD_BUG_ON((__fix_to_virt(__end_of_early_ioremap_region) >> PMD_SHIFT) != FIXADDR_TOP >> PMD_SHIFT); pmd = fixmap_pmd(FIXADDR_TOP); |