Commit 0dbfafa5 authored by Alexander van Heukelum's avatar Alexander van Heukelum Committed by Thomas Gleixner

x86: move i386 memory setup code to e820_32.c

The x86_64 code has centralized the memory setup code in
e820_64.c. This patch copies that approach to i386:

- early_param("mem", ...) parsing is moved from
setup_32.c to e820_32.c.

- setup_memory_map() and finish_e820_parsing() are
factored out from setup_arch(), and declarations
are added to e820_32.h.

- print_memory_map() is made static and removed from
e820_32.h.

- user_defined_memmap is marked as __initdata.
Signed-off-by: default avatarAlexander van Heukelum <heukelum@fastmail.fm>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 0da72a4a
......@@ -30,7 +30,6 @@ unsigned long pci_mem_start = 0x10000000;
#ifdef CONFIG_PCI
EXPORT_SYMBOL(pci_mem_start);
#endif
extern int user_defined_memmap;
static struct resource system_rom_resource = {
.name = "System ROM",
......@@ -584,7 +583,7 @@ void __init e820_register_memory(void)
pci_mem_start, gapstart, gapsize);
}
void __init print_memory_map(char *who)
static void __init print_memory_map(char *who)
{
int i;
......@@ -692,6 +691,54 @@ e820_all_mapped(unsigned long s, unsigned long e, unsigned type)
return 0;
}
/* Overridden in paravirt.c if CONFIG_PARAVIRT */
char * __init __attribute__((weak)) memory_setup(void)
{
return machine_specific_memory_setup();
}
void __init setup_memory_map(void)
{
printk(KERN_INFO "BIOS-provided physical RAM map:\n");
print_memory_map(memory_setup());
}
static int __initdata user_defined_memmap;
/*
* "mem=nopentium" disables the 4MB page tables.
* "mem=XXX[kKmM]" defines a memory region from HIGH_MEM
* to <mem>, overriding the bios size.
* "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from
* <start> to <start>+<mem>, overriding the bios size.
*
* HPA tells me bootloaders need to parse mem=, so no new
* option should be mem= [also see Documentation/i386/boot.txt]
*/
static int __init parse_mem(char *arg)
{
if (!arg)
return -EINVAL;
if (strcmp(arg, "nopentium") == 0) {
setup_clear_cpu_cap(X86_FEATURE_PSE);
} else {
/* If the user specifies memory size, we
* limit the BIOS-provided memory map to
* that size. exactmap can be used to specify
* the exact map. mem=number can be used to
* trim the existing memory map.
*/
unsigned long long mem_size;
mem_size = memparse(arg, &arg);
limit_regions(mem_size);
user_defined_memmap = 1;
}
return 0;
}
early_param("mem", parse_mem);
static int __init parse_memmap(char *arg)
{
if (!arg)
......@@ -762,6 +809,15 @@ void __init update_memory_range(u64 start, u64 size, unsigned old_type,
new_type);
}
}
void __init finish_e820_parsing(void)
{
if (user_defined_memmap) {
printk(KERN_INFO "user-defined physical RAM map:\n");
print_memory_map("user");
}
}
void __init update_e820(void)
{
u8 nr_map;
......
......@@ -237,42 +237,6 @@ static inline void copy_edd(void)
}
#endif
int __initdata user_defined_memmap;
/*
* "mem=nopentium" disables the 4MB page tables.
* "mem=XXX[kKmM]" defines a memory region from HIGH_MEM
* to <mem>, overriding the bios size.
* "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from
* <start> to <start>+<mem>, overriding the bios size.
*
* HPA tells me bootloaders need to parse mem=, so no new
* option should be mem= [also see Documentation/i386/boot.txt]
*/
static int __init parse_mem(char *arg)
{
if (!arg)
return -EINVAL;
if (strcmp(arg, "nopentium") == 0) {
setup_clear_cpu_cap(X86_FEATURE_PSE);
} else {
/* If the user specifies memory size, we
* limit the BIOS-provided memory map to
* that size. exactmap can be used to specify
* the exact map. mem=number can be used to
* trim the existing memory map.
*/
unsigned long long mem_size;
mem_size = memparse(arg, &arg);
limit_regions(mem_size);
user_defined_memmap = 1;
}
return 0;
}
early_param("mem", parse_mem);
#ifdef CONFIG_PROC_VMCORE
/* elfcorehdr= specifies the location of elf core header
* stored by the crashed kernel.
......@@ -725,12 +689,6 @@ static void set_mca_bus(int x)
static void set_mca_bus(int x) { }
#endif
/* Overridden in paravirt.c if CONFIG_PARAVIRT */
char * __init __attribute__((weak)) memory_setup(void)
{
return machine_specific_memory_setup();
}
#ifdef CONFIG_NUMA
/*
* In the golden day, when everything among i386 and x86_64 will be
......@@ -786,8 +744,7 @@ void __init setup_arch(char **cmdline_p)
#endif
ARCH_SETUP
printk(KERN_INFO "BIOS-provided physical RAM map:\n");
print_memory_map(memory_setup());
setup_memory_map();
copy_edd();
......@@ -807,10 +764,7 @@ void __init setup_arch(char **cmdline_p)
parse_early_param();
if (user_defined_memmap) {
printk(KERN_INFO "user-defined physical RAM map:\n");
print_memory_map("user");
}
finish_e820_parsing();
strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
*cmdline_p = command_line;
......
......@@ -18,6 +18,9 @@
#ifndef __ASSEMBLY__
extern void setup_memory_map(void);
extern void finish_e820_parsing(void);
extern struct e820map e820;
extern void update_e820(void);
......@@ -32,7 +35,6 @@ extern void update_memory_range(u64 start, u64 size, unsigned old_type,
unsigned new_type);
extern void e820_register_memory(void);
extern void limit_regions(unsigned long long size);
extern void print_memory_map(char *who);
extern void init_iomem_resources(struct resource *code_resource,
struct resource *data_resource,
struct resource *bss_resource);
......
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