This patch adds a machine descriptor hook that gives control to machine
specific code prior to memory and paging initialization.
On Keystone platforms, this hook is used to switch the PHYS_OFFSET over
to the "real" non-32-bit-addressable address range.
Signed-off-by: Cyril Chemparathy <cy...@ti.com>
Signed-off-by: Vitaly Andrianov <vita...@ti.com>
---
arch/arm/include/asm/mach/arch.h | 1 +
arch/arm/kernel/setup.c | 3 +++
2 files changed, 4 insertions(+)
diff --git a/arch/arm/include/asm/mach/arch.h b/arch/arm/include/asm/mach/arch.h
index 0b1c94b..49e9c2a 100644
--- a/arch/arm/include/asm/mach/arch.h
+++ b/arch/arm/include/asm/mach/arch.h
@@ -39,6 +39,7 @@ struct machine_desc {
struct meminfo *);
void (*reserve)(void);/* reserve mem blocks */
void (*map_io)(void);/* IO mapping function */
+ void (*init_meminfo)(void);
void (*init_early)(void);
void (*init_irq)(void);
struct sys_timer *timer; /* system tick timer */
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index e15d83b..7cbe292 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -964,6 +964,9 @@ void __init setup_arch(char **cmdline_p)
parse_early_param();
+ if (mdesc->init_meminfo)
+ mdesc->init_meminfo();
+
sort(&meminfo.bank, meminfo.nr_banks, sizeof(meminfo.bank[0]),
meminfo_cmp, NULL);
sanity_check_meminfo();
arm_memblock_init(&meminfo, mdesc);
--
1.7.9.5
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