提交 d2043ca8 编写于 作者: F Franck Bui-Huu 提交者: Ralf Baechle

[MIPS] setup.c: move initrd code inside dedicated functions

NUMA specific code could rely on them too.
Signed-off-by: NFranck Bui-Huu <vagabon.xyz@gmail.com>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
上级 b6f1f0de
......@@ -200,7 +200,12 @@ static inline void parse_cmdline_early(void)
}
}
static inline int parse_rd_cmdline(unsigned long* rd_start, unsigned long* rd_end)
/*
* Manage initrd
*/
#ifdef CONFIG_BLK_DEV_INITRD
static int __init parse_rd_cmdline(unsigned long *rd_start, unsigned long *rd_end)
{
/*
* "rd_start=0xNNNNNNNN" defines the memory address of an initrd
......@@ -263,49 +268,93 @@ static inline int parse_rd_cmdline(unsigned long* rd_start, unsigned long* rd_en
return 0;
}
static unsigned long __init init_initrd(void)
{
unsigned long tmp, end;
u32 *initrd_header;
ROOT_DEV = Root_RAM0;
if (parse_rd_cmdline(&initrd_start, &initrd_end))
return initrd_end;
/*
* Board specific code should have set up initrd_start
* and initrd_end...
*/
end = (unsigned long)&_end;
tmp = PAGE_ALIGN(end) - sizeof(u32) * 2;
if (tmp < end)
tmp += PAGE_SIZE;
initrd_header = (u32 *)tmp;
if (initrd_header[0] == 0x494E5244) {
initrd_start = (unsigned long)&initrd_header[2];
initrd_end = initrd_start + initrd_header[1];
}
return initrd_end;
}
static void __init finalize_initrd(void)
{
unsigned long size = initrd_end - initrd_start;
if (size == 0) {
printk(KERN_INFO "Initrd not found or empty");
goto disable;
}
if (CPHYSADDR(initrd_end) > PFN_PHYS(max_low_pfn)) {
printk("Initrd extends beyond end of memory");
goto disable;
}
reserve_bootmem(CPHYSADDR(initrd_start), size);
initrd_below_start_ok = 1;
printk(KERN_INFO "Initial ramdisk at: 0x%lx (%lu bytes)\n",
initrd_start, size);
return;
disable:
printk(" - disabling initrd\n");
initrd_start = 0;
initrd_end = 0;
}
#else /* !CONFIG_BLK_DEV_INITRD */
#define init_initrd() 0
#define finalize_initrd() do {} while (0)
#endif
/*
* Initialize the bootmem allocator. It also setup initrd related data
* if needed.
*/
#ifdef CONFIG_SGI_IP27
static void __init bootmem_init(void)
{
unsigned long reserved_end = (unsigned long)&_end;
#ifndef CONFIG_SGI_IP27
init_initrd();
finalize_initrd();
}
#else /* !CONFIG_SGI_IP27 */
static void __init bootmem_init(void)
{
unsigned long reserved_end;
unsigned long highest = 0;
unsigned long mapstart = -1UL;
unsigned long bootmap_size;
int i;
#endif
#ifdef CONFIG_BLK_DEV_INITRD
int initrd_reserve_bootmem = 0;
/* Board specific code should have set up initrd_start and initrd_end */
ROOT_DEV = Root_RAM0;
if (parse_rd_cmdline(&initrd_start, &initrd_end)) {
reserved_end = max(reserved_end, initrd_end);
initrd_reserve_bootmem = 1;
} else {
unsigned long tmp;
u32 *initrd_header;
tmp = PAGE_ALIGN(reserved_end) - sizeof(u32) * 2;
if (tmp < reserved_end)
tmp += PAGE_SIZE;
initrd_header = (u32 *)tmp;
if (initrd_header[0] == 0x494E5244) {
initrd_start = (unsigned long)&initrd_header[2];
initrd_end = initrd_start + initrd_header[1];
reserved_end = max(reserved_end, initrd_end);
initrd_reserve_bootmem = 1;
}
}
#endif /* CONFIG_BLK_DEV_INITRD */
#ifndef CONFIG_SGI_IP27
/*
* reserved_end is now a pfn
* Init any data related to initrd. It's a nop if INITRD is
* not selected. Once that done we can determine the low bound
* of usable memory.
*/
reserved_end = PFN_UP(CPHYSADDR(reserved_end));
reserved_end = init_initrd();
reserved_end = PFN_UP(CPHYSADDR(max(reserved_end, (unsigned long)&_end)));
/*
* Find the highest page frame number we have available.
......@@ -388,35 +437,14 @@ static void __init bootmem_init(void)
*/
reserve_bootmem(PFN_PHYS(mapstart), bootmap_size);
#endif /* CONFIG_SGI_IP27 */
#ifdef CONFIG_BLK_DEV_INITRD
initrd_below_start_ok = 1;
if (initrd_start) {
unsigned long initrd_size = ((unsigned char *)initrd_end) -
((unsigned char *)initrd_start);
const int width = sizeof(long) * 2;
printk("Initial ramdisk at: 0x%p (%lu bytes)\n",
(void *)initrd_start, initrd_size);
if (CPHYSADDR(initrd_end) > PFN_PHYS(max_low_pfn)) {
printk("initrd extends beyond end of memory "
"(0x%0*Lx > 0x%0*Lx)\ndisabling initrd\n",
width,
(unsigned long long) CPHYSADDR(initrd_end),
width,
(unsigned long long) PFN_PHYS(max_low_pfn));
initrd_start = initrd_end = 0;
initrd_reserve_bootmem = 0;
}
if (initrd_reserve_bootmem)
reserve_bootmem(CPHYSADDR(initrd_start), initrd_size);
}
#endif /* CONFIG_BLK_DEV_INITRD */
/*
* Reserve initrd memory if needed.
*/
finalize_initrd();
}
#endif /* CONFIG_SGI_IP27 */
/*
* arch_mem_init - initialize memory managment subsystem
*
......
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