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sh: add memory resources to /proc/iomem 

Add physical memory resources such as System RAM, Kernel code/data/bss
and reserved crash dump area to /proc/iomem. Same strategy as on x86.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Magnus Damm 2008-04-23 20:56:44 +09:00 committed by Paul Mundt
parent 3d83984e99
commit 0146ba78b9
3 changed files with 40 additions and 2 deletions
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38
arch/sh/kernel/setup.c
View File

@ -87,6 +87,8 @@ EXPORT_SYMBOL(memory_start);
unsigned long memory_end = 0;
EXPORT_SYMBOL(memory_end);
static struct resource mem_resources[MAX_NUMNODES];
int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;
static int __init early_parse_mem(char *p)
@ -175,6 +177,40 @@ static inline void __init reserve_crashkernel(void)
{}
#endif
void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
unsigned long end_pfn)
{
struct resource *res = &mem_resources[nid];
WARN_ON(res->name); /* max one active range per node for now */
res->name = "System RAM";
res->start = start_pfn << PAGE_SHIFT;
res->end = (end_pfn << PAGE_SHIFT) - 1;
res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
if (request_resource(&iomem_resource, res)) {
pr_err("unable to request memory_resource 0x%lx 0x%lx\n",
start_pfn, end_pfn);
return;
}
/*
* We don't know which RAM region contains kernel data,
* so we try it repeatedly and let the resource manager
* test it.
*/
request_resource(res, &code_resource);
request_resource(res, &data_resource);
request_resource(res, &bss_resource);
#ifdef CONFIG_KEXEC
if (crashk_res.start != crashk_res.end)
request_resource(res, &crashk_res);
#endif
add_active_range(nid, start_pfn, end_pfn);
}
void __init setup_bootmem_allocator(unsigned long free_pfn)
{
unsigned long bootmap_size;
@ -187,7 +223,7 @@ void __init setup_bootmem_allocator(unsigned long free_pfn)
bootmap_size = init_bootmem_node(NODE_DATA(0), free_pfn,
min_low_pfn, max_low_pfn);
add_active_range(0, min_low_pfn, max_low_pfn);
__add_active_range(0, min_low_pfn, max_low_pfn);
register_bootmem_low_pages();
node_set_online(0);

2
arch/sh/mm/numa.c
View File

@ -59,7 +59,7 @@ void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end)
free_pfn = start_pfn = start >> PAGE_SHIFT;
end_pfn = end >> PAGE_SHIFT;
add_active_range(nid, start_pfn, end_pfn);
__add_active_range(nid, start_pfn, end_pfn);
/* Node-local pgdat */
NODE_DATA(nid) = pfn_to_kaddr(free_pfn);

2
include/asm-sh/mmzone.h
View File

@ -41,6 +41,8 @@ void __init plat_mem_setup(void);
/* arch/sh/kernel/setup.c */
void __init setup_bootmem_allocator(unsigned long start_pfn);
void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
unsigned long end_pfn);
#endif /* __KERNEL__ */
#endif /* __ASM_SH_MMZONE_H */