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[MIPS] setup.c: clean up initrd related code 

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Franck Bui-Huu 2006-10-19 13:20:04 +02:00 committed by Ralf Baechle
parent f5bffe3a9b
commit a7837b76b6
2 changed files with 46 additions and 30 deletions
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71
arch/mips/kernel/setup.c
View File

@ -145,13 +145,12 @@ static int __init rd_start_early(char *p)
unsigned long start = memparse(p, &p);
#ifdef CONFIG_64BIT
/* HACK: Guess if the sign extension was forgotten */
if (start > 0x0000000080000000 && start < 0x00000000ffffffff)
start |= 0xffffffff00000000UL;
/* Guess if the sign extension was forgotten by bootloader */
if (start < XKPHYS)
start = (int)start;
#endif
initrd_start = start;
initrd_end += start;
return 0;
}
early_param("rd_start", rd_start_early);
@ -159,41 +158,64 @@ early_param("rd_start", rd_start_early);
static int __init rd_size_early(char *p)
{
initrd_end += memparse(p, &p);
return 0;
}
early_param("rd_size", rd_size_early);
/* it returns the next free pfn after initrd */
static unsigned long __init init_initrd(void)
{
unsigned long tmp, end, size;
unsigned long end;
u32 *initrd_header;
ROOT_DEV = Root_RAM0;
/*
* Board specific code or command line parser should have
* already set up initrd_start and initrd_end. In these cases
* perfom sanity checks and use them if all looks good.
*/
size = initrd_end - initrd_start;
if (initrd_end == 0 || size == 0) {
initrd_start = 0;
initrd_end = 0;
} else
return initrd_end;
if (initrd_start && initrd_end > initrd_start)
goto sanitize;
end = (unsigned long)&_end;
tmp = PAGE_ALIGN(end) - sizeof(u32) * 2;
if (tmp < end)
tmp += PAGE_SIZE;
/*
* See if initrd has been added to the kernel image by
* arch/mips/boot/addinitrd.c. In that case a header is
* prepended to initrd and is made up by 8 bytes. The fisrt
* word is a magic number and the second one is the size of
* initrd. Initrd start must be page aligned in any cases.
*/
initrd_header = __va(PAGE_ALIGN(__pa_symbol(&_end) + 8)) - 8;
if (initrd_header[0] != 0x494E5244)
goto disable;
initrd_start = (unsigned long)(initrd_header + 2);
initrd_end = initrd_start + initrd_header[1];
initrd_header = (u32 *)tmp;
if (initrd_header[0] == 0x494E5244) {
initrd_start = (unsigned long)&initrd_header[2];
initrd_end = initrd_start + initrd_header[1];
sanitize:
if (initrd_start & ~PAGE_MASK) {
printk(KERN_ERR "initrd start must be page aligned\n");
goto disable;
}
return initrd_end;
if (initrd_start < PAGE_OFFSET) {
printk(KERN_ERR "initrd start < PAGE_OFFSET\n");
goto disable;
}
/*
* Sanitize initrd addresses. For example firmware
* can't guess if they need to pass them through
* 64-bits values if the kernel has been built in pure
* 32-bit. We need also to switch from KSEG0 to XKPHYS
* addresses now, so the code can now safely use __pa().
*/
end = __pa(initrd_end);
initrd_end = (unsigned long)__va(end);
initrd_start = (unsigned long)__va(__pa(initrd_start));
ROOT_DEV = Root_RAM0;
return PFN_UP(end);
disable:
initrd_start = 0;
initrd_end = 0;
return 0;
}
static void __init finalize_initrd(void)
@ -259,8 +281,7 @@ static void __init bootmem_init(void)
* not selected. Once that done we can determine the low bound
* of usable memory.
*/
reserved_end = init_initrd();
reserved_end = PFN_UP(max(__pa(reserved_end), __pa_symbol(&_end)));
reserved_end = max(init_initrd(), PFN_UP(__pa_symbol(&_end)));
/*
* Find the highest page frame number we have available.

5
arch/mips/mm/init.c
View File

@ -460,11 +460,6 @@ void free_init_pages(char *what, unsigned long begin, unsigned long end)
#ifdef CONFIG_BLK_DEV_INITRD
void free_initrd_mem(unsigned long start, unsigned long end)
{
#ifdef CONFIG_64BIT
/* Switch from KSEG0 to XKPHYS addresses */
start = (unsigned long)phys_to_virt(CPHYSADDR(start));
end = (unsigned long)phys_to_virt(CPHYSADDR(end));
#endif
free_init_pages("initrd memory", start, end);
}
#endif