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of/fdt: move memreserve and dtb memory reservations into core 

Move the /memreserve/ processing and dtb memory reservations into
early_init_fdt_scan_reserved_mem. This converts arm, arm64, and powerpc
as they are the only users of early_init_fdt_scan_reserved_mem.

memblock_reserve is safe to call on the same region twice, so the
reservation check for the dtb in powerpc 32-bit reservations is safe to
remove.

Signed-off-by: Rob Herring <robh@kernel.org>
Tested-by: Michal Simek <michal.simek@xilinx.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Tested-by: Grant Likely <grant.likely@linaro.org>
Tested-by: Stephen Chivers <schivers@csc.com>
This commit is contained in:
Rob Herring 2014-04-01 22:46:48 -05:00
parent b0a6fb36a4
commit d1552ce449
6 changed files with 16 additions and 73 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/include/asm/prom.h
View File

@ -14,7 +14,6 @@
#ifdef CONFIG_OF
extern const struct machine_desc *setup_machine_fdt(unsigned int dt_phys);
extern void arm_dt_memblock_reserve(void);
extern void __init arm_dt_init_cpu_maps(void);
#else /* CONFIG_OF */
@ -24,7 +23,6 @@ static inline const struct machine_desc *setup_machine_fdt(unsigned int dt_phys)
return NULL;
}
static inline void arm_dt_memblock_reserve(void) { }
static inline void arm_dt_init_cpu_maps(void) { }
#endif /* CONFIG_OF */

27
arch/arm/kernel/devtree.c
View File

@ -32,33 +32,6 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size)
arm_add_memory(base, size);
}
void __init arm_dt_memblock_reserve(void)
{
u64 *reserve_map, base, size;
if (!initial_boot_params)
return;
/* Reserve the dtb region */
memblock_reserve(virt_to_phys(initial_boot_params),
be32_to_cpu(initial_boot_params->totalsize));
/*
* Process the reserve map. This will probably overlap the initrd
* and dtb locations which are already reserved, but overlaping
* doesn't hurt anything
*/
reserve_map = ((void*)initial_boot_params) +
be32_to_cpu(initial_boot_params->off_mem_rsvmap);
while (1) {
base = be64_to_cpup(reserve_map++);
size = be64_to_cpup(reserve_map++);
if (!size)
break;
memblock_reserve(base, size);
}
}
#ifdef CONFIG_SMP
extern struct of_cpu_method __cpu_method_of_table_begin[];
extern struct of_cpu_method __cpu_method_of_table_end[];

1
arch/arm/mm/init.c
View File

@ -317,7 +317,6 @@ void __init arm_memblock_init(struct meminfo *mi,
#endif
arm_mm_memblock_reserve();
arm_dt_memblock_reserve();
/* reserve any platform specific memblock areas */
if (mdesc->reserve)

21
arch/arm64/mm/init.c
View File

@ -126,8 +126,6 @@ static void arm64_memory_present(void)
void __init arm64_memblock_init(void)
{
u64 *reserve_map, base, size;
/* Register the kernel text, kernel data and initrd with memblock */
memblock_reserve(__pa(_text), _end - _text);
#ifdef CONFIG_BLK_DEV_INITRD
@ -142,25 +140,6 @@ void __init arm64_memblock_init(void)
memblock_reserve(__pa(swapper_pg_dir), SWAPPER_DIR_SIZE);
memblock_reserve(__pa(idmap_pg_dir), IDMAP_DIR_SIZE);
/* Reserve the dtb region */
memblock_reserve(virt_to_phys(initial_boot_params),
be32_to_cpu(initial_boot_params->totalsize));
/*
* Process the reserve map. This will probably overlap the initrd
* and dtb locations which are already reserved, but overlapping
* doesn't hurt anything
*/
reserve_map = ((void*)initial_boot_params) +
be32_to_cpu(initial_boot_params->off_mem_rsvmap);
while (1) {
base = be64_to_cpup(reserve_map++);
size = be64_to_cpup(reserve_map++);
if (!size)
break;
memblock_reserve(base, size);
}
early_init_fdt_scan_reserved_mem();
dma_contiguous_reserve(0);

22
arch/powerpc/kernel/prom.c
View File

@ -596,19 +596,11 @@ static void __init early_reserve_mem_dt(void)
static void __init early_reserve_mem(void)
{
u64 base, size;
__be64 *reserve_map;
unsigned long self_base;
unsigned long self_size;
reserve_map = (__be64 *)(((unsigned long)initial_boot_params) +
be32_to_cpu(initial_boot_params->off_mem_rsvmap));
/* before we do anything, lets reserve the dt blob */
self_base = __pa((unsigned long)initial_boot_params);
self_size = be32_to_cpu(initial_boot_params->totalsize);
memblock_reserve(self_base, self_size);
/* Look for the new "reserved-regions" property in the DT */
early_reserve_mem_dt();
@ -637,26 +629,12 @@ static void __init early_reserve_mem(void)
size_32 = be32_to_cpup(reserve_map_32++);
if (size_32 == 0)
break;
/* skip if the reservation is for the blob */
if (base_32 == self_base && size_32 == self_size)
continue;
DBG("reserving: %x -> %x\n", base_32, size_32);
memblock_reserve(base_32, size_32);
}
return;
}
#endif
DBG("Processing reserve map\n");
/* Handle the reserve map in the fdt blob if it exists */
while (1) {
base = be64_to_cpup(reserve_map++);
size = be64_to_cpup(reserve_map++);
if (size == 0)
break;
DBG("reserving: %llx -> %llx\n", base, size);
memblock_reserve(base, size);
}
}
void __init early_init_devtree(void *params)

16
drivers/of/fdt.c
View File

@ -492,9 +492,25 @@ static int __init __fdt_scan_reserved_mem(unsigned long node, const char *uname,
*/
void __init early_init_fdt_scan_reserved_mem(void)
{
int n;
u64 base, size;
if (!initial_boot_params)
return;
/* Reserve the dtb region */
early_init_dt_reserve_memory_arch(__pa(initial_boot_params),
fdt_totalsize(initial_boot_params),
0);
/* Process header /memreserve/ fields */
for (n = 0; ; n++) {
fdt_get_mem_rsv(initial_boot_params, n, &base, &size);
if (!size)
break;
early_init_dt_reserve_memory_arch(base, size, 0);
}
of_scan_flat_dt(__fdt_scan_reserved_mem, NULL);
fdt_init_reserved_mem();
}