diff options
| author | Afzal Mohammed <afzal.mohd.ma@gmail.com> | 2017-01-29 17:31:32 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@armlinux.org.uk> | 2017-02-28 11:06:12 +0000 |
| commit | d2ca5f2491c1246adf3847101fdc538a3b89439c (patch) | |
| tree | 0657168ff0f464732cbfe8605b00e0e62f390a08 | |
| parent | 035e787543de709f29b38752251d4724200ec353 (diff) | |
| download | lwn-d2ca5f2491c1246adf3847101fdc538a3b89439c.tar.gz lwn-d2ca5f2491c1246adf3847101fdc538a3b89439c.zip | |
ARM: 8646/1: mmu: decouple VECTORS_BASE from Kconfig
For MMU configurations, VECTORS_BASE is always 0xffff0000, a macro
definition will suffice.
For no-MMU, exception base address is dynamically determined in
subsequent patches. To preserve bisectability, now make the
macro applicable for no-MMU scenario too.
Thanks to 0-DAY kernel test infrastructure that found the
bisectability issue. This macro will be restricted to MMU case upon
dynamically determining exception base address for no-MMU.
Once exception address is handled dynamically for no-MMU,
VECTORS_BASE can be removed from Kconfig.
Signed-off-by: afzal mohammed <afzal.mohd.ma@gmail.com>
Tested-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/include/asm/memory.h | 2 | ||||
| -rw-r--r-- | arch/arm/mach-berlin/platsmp.c | 3 | ||||
| -rw-r--r-- | arch/arm/mm/dump.c | 5 | ||||
| -rw-r--r-- | arch/arm/mm/init.c | 4 |
4 files changed, 9 insertions, 5 deletions
diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h index c30d0d82a105..00bd3529854a 100644 --- a/arch/arm/include/asm/memory.h +++ b/arch/arm/include/asm/memory.h @@ -111,6 +111,8 @@ #endif /* !CONFIG_MMU */ +#define VECTORS_BASE UL(0xffff0000) + #ifdef CONFIG_XIP_KERNEL #define KERNEL_START _sdata #else diff --git a/arch/arm/mach-berlin/platsmp.c b/arch/arm/mach-berlin/platsmp.c index 1167b0ed92c8..7586b7aec272 100644 --- a/arch/arm/mach-berlin/platsmp.c +++ b/arch/arm/mach-berlin/platsmp.c @@ -15,6 +15,7 @@ #include <asm/cacheflush.h> #include <asm/cp15.h> +#include <asm/memory.h> #include <asm/smp_plat.h> #include <asm/smp_scu.h> @@ -75,7 +76,7 @@ static void __init berlin_smp_prepare_cpus(unsigned int max_cpus) if (!cpu_ctrl) goto unmap_scu; - vectors_base = ioremap(CONFIG_VECTORS_BASE, SZ_32K); + vectors_base = ioremap(VECTORS_BASE, SZ_32K); if (!vectors_base) goto unmap_scu; diff --git a/arch/arm/mm/dump.c b/arch/arm/mm/dump.c index 9fe8e241335c..21192d6eda40 100644 --- a/arch/arm/mm/dump.c +++ b/arch/arm/mm/dump.c @@ -18,6 +18,7 @@ #include <linux/seq_file.h> #include <asm/fixmap.h> +#include <asm/memory.h> #include <asm/pgtable.h> struct addr_marker { @@ -31,8 +32,8 @@ static struct addr_marker address_markers[] = { { 0, "vmalloc() Area" }, { VMALLOC_END, "vmalloc() End" }, { FIXADDR_START, "Fixmap Area" }, - { CONFIG_VECTORS_BASE, "Vectors" }, - { CONFIG_VECTORS_BASE + PAGE_SIZE * 2, "Vectors End" }, + { VECTORS_BASE, "Vectors" }, + { VECTORS_BASE + PAGE_SIZE * 2, "Vectors End" }, { -1, NULL }, }; diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index 4127f578086c..50e5402a8ef3 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -27,6 +27,7 @@ #include <asm/cp15.h> #include <asm/mach-types.h> #include <asm/memblock.h> +#include <asm/memory.h> #include <asm/prom.h> #include <asm/sections.h> #include <asm/setup.h> @@ -518,8 +519,7 @@ void __init mem_init(void) " .data : 0x%p" " - 0x%p" " (%4td kB)\n" " .bss : 0x%p" " - 0x%p" " (%4td kB)\n", - MLK(UL(CONFIG_VECTORS_BASE), UL(CONFIG_VECTORS_BASE) + - (PAGE_SIZE)), + MLK(VECTORS_BASE, VECTORS_BASE + PAGE_SIZE), #ifdef CONFIG_HAVE_TCM MLK(DTCM_OFFSET, (unsigned long) dtcm_end), MLK(ITCM_OFFSET, (unsigned long) itcm_end), |