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csky: Add setup_initrd check code

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We should give some necessary check for initrd just like other
architectures and it seems that setup_initrd() could be a common
code for all architectures.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
This commit is contained in:
Guo Ren 2019-10-08 14:25:13 +08:00
parent 4ec575b785
commit d46869aaab
2 changed files with 44 additions and 3 deletions
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3
arch/csky/kernel/setup.c
View File

@ -47,9 +47,6 @@ static void __init csky_memblock_init(void)
signed long size;
memblock_reserve(__pa(_stext), _end - _stext);
#ifdef CONFIG_BLK_DEV_INITRD
memblock_reserve(__pa(initrd_start), initrd_end - initrd_start);
#endif
early_init_fdt_reserve_self();
early_init_fdt_scan_reserved_mem();

44
arch/csky/mm/init.c
View File

@ -19,6 +19,7 @@
#include <linux/swap.h>
#include <linux/proc_fs.h>
#include <linux/pfn.h>
#include <linux/initrd.h>
#include <asm/setup.h>
#include <asm/cachectl.h>
@ -36,6 +37,45 @@ unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]
__page_aligned_bss;
EXPORT_SYMBOL(empty_zero_page);
#ifdef CONFIG_BLK_DEV_INITRD
static void __init setup_initrd(void)
{
unsigned long size;
if (initrd_start >= initrd_end) {
pr_err("initrd not found or empty");
goto disable;
}
if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) {
pr_err("initrd extends beyond end of memory");
goto disable;
}
size = initrd_end - initrd_start;
if (memblock_is_region_reserved(__pa(initrd_start), size)) {
pr_err("INITRD: 0x%08lx+0x%08lx overlaps in-use memory region",
__pa(initrd_start), size);
goto disable;
}
memblock_reserve(__pa(initrd_start), size);
pr_info("Initial ramdisk at: 0x%p (%lu bytes)\n",
(void *)(initrd_start), size);
initrd_below_start_ok = 1;
return;
disable:
initrd_start = initrd_end = 0;
pr_err(" - disabling initrd\n");
}
#endif
void __init mem_init(void)
{
#ifdef CONFIG_HIGHMEM
@ -47,6 +87,10 @@ void __init mem_init(void)
#endif
high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT);
#ifdef CONFIG_BLK_DEV_INITRD
setup_initrd();
#endif
memblock_free_all();
#ifdef CONFIG_HIGHMEM