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x86: qemu: Extract getting memory size to a separate routine

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This extracts getting memory size logic in dram_init() to a separate
routine qemu_get_low_memory_size(). No functional changes.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Aiden Park <aiden.park@intel.com>
This commit is contained in:
Bin Meng
2019-08-29 02:53:04 -07:00
parent d2860c0088
commit f4c0030074
2 changed files with 14 additions and 2 deletions
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9
arch/x86/cpu/qemu/dram.c
View File

@@ -9,7 +9,7 @@
DECLARE_GLOBAL_DATA_PTR; DECLARE_GLOBAL_DATA_PTR;
int dram_init(void) u32 qemu_get_low_memory_size(void)
{ {
u32 ram; u32 ram;
@@ -19,7 +19,12 @@ int dram_init(void)
ram |= ((u32)inb(CMOS_DATA_PORT)) << 6; ram |= ((u32)inb(CMOS_DATA_PORT)) << 6;
ram += 16 * 1024; ram += 16 * 1024;
gd->ram_size = ram * 1024; return ram * 1024;
}
int dram_init(void)
{
gd->ram_size = qemu_get_low_memory_size();
post_code(POST_DRAM); post_code(POST_DRAM);
return 0; return 0;

7
arch/x86/include/asm/arch-qemu/qemu.h
View File

@@ -37,4 +37,11 @@
#define PMREGMISC 0x80 #define PMREGMISC 0x80
#define PMIOSE (1 << 0) #define PMIOSE (1 << 0)
/**
* qemu_get_low_memory_size() - Get low memory size
*
* @return: size of memory below 4GiB
*/
u32 qemu_get_low_memory_size(void);
#endif /* _ARCH_QEMU_H_ */ #endif /* _ARCH_QEMU_H_ */