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ARM: 5880/1: arm: use generic infrastructure for early params

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The ARM setup code includes its own parser for early params, there's
also one in the generic init code.

This patch removes __early_init (and related code) from
arch/arm/kernel/setup.c, and changes users to the generic early_init
macro instead.

The generic macro takes a char * argument, rather than char **, so we
need to update the parser functions a little.

Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Jeremy Kerr
2010-01-11 23:17:34 +01:00
committed by Russell King
parent e119bfff1f
commit 2b0d8c251b
6 changed files with 49 additions and 91 deletions
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64
arch/arm/kernel/setup.c
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@@ -418,10 +418,11 @@ static int __init arm_add_memory(unsigned long start, unsigned long size)
* Pick out the memory size. We look for mem=size@start,
* where start and size are "size[KkMm]"
*/
static void __init early_mem(char **p)
static int __init early_mem(char *p)
{
static int usermem __initdata = 0;
unsigned long size, start;
char *endp;
/*
* If the user specifies memory size, we
@@ -434,52 +435,15 @@ static void __init early_mem(char **p)
}
start = PHYS_OFFSET;
size = memparse(*p, p);
if (**p == '@')
start = memparse(*p + 1, p);
size = memparse(p, &endp);
if (*endp == '@')
start = memparse(endp + 1, NULL);
arm_add_memory(start, size);
return 0;
}
__early_param("mem=", early_mem);
/*
* Initial parsing of the command line.
*/
static void __init parse_cmdline(char **cmdline_p, char *from)
{
char c = ' ', *to = command_line;
int len = 0;
for (;;) {
if (c == ' ') {
extern struct early_params __early_begin, __early_end;
struct early_params *p;
for (p = &__early_begin; p < &__early_end; p++) {
int arglen = strlen(p->arg);
if (memcmp(from, p->arg, arglen) == 0) {
if (to != command_line)
to -= 1;
from += arglen;
p->fn(&from);
while (*from != ' ' && *from != '\0')
from++;
break;
}
}
}
c = *from++;
if (!c)
break;
if (COMMAND_LINE_SIZE <= ++len)
break;
*to++ = c;
}
*to = '\0';
*cmdline_p = command_line;
}
early_param("mem", early_mem);
static void __init
setup_ramdisk(int doload, int prompt, int image_start, unsigned int rd_sz)
@@ -740,9 +704,15 @@ void __init setup_arch(char **cmdline_p)
init_mm.end_data = (unsigned long) _edata;
init_mm.brk = (unsigned long) _end;
memcpy(boot_command_line, from, COMMAND_LINE_SIZE);
boot_command_line[COMMAND_LINE_SIZE-1] = '\0';
parse_cmdline(cmdline_p, from);
/* parse_early_param needs a boot_command_line */
strlcpy(boot_command_line, from, COMMAND_LINE_SIZE);
/* populate command_line too for later use, preserving boot_command_line */
strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
*cmdline_p = command_line;
parse_early_param();
paging_init(mdesc);
request_standard_resources(&meminfo, mdesc);