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Change multiply ONE_MB to bit shifting. 

2048 * ONE_MB will cause warning,
src/northbridge/amd/agesa/family15tn/northbridge.c:667:50: warning: integer overflow in expression [-Woverflow]
I guess it will change the data type to signed integer.
I think the bit shifting is better.

Change-Id: I823f7ead1f7d622bf653cb3bf2ae2343f5e76805
Signed-off-by: Zheng Bao <zheng.bao@amd.com>
Signed-off-by: zbao <fishbaozi@gmail.com>
Reviewed-on: http://review.coreboot.org/1263
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
zbao 2012-07-23 19:44:29 +08:00 committed by Stefan Reinauer
parent ace7a6aadd
commit 405cfe219a
1 changed files with 9 additions and 9 deletions
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18
src/northbridge/amd/agesa/family15tn/northbridge.c
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@ -636,7 +636,7 @@ static struct hw_mem_hole_info get_hw_mem_hole_info(void)
}
#endif
#define ONE_MB 0x100000
#define ONE_MB_SHIFT 20
void setup_uma_memory(void)
{
@ -663,13 +663,13 @@ void setup_uma_memory(void)
* >=1G 256M
* <1G 64M
*/
sys_mem = msr.lo + 16 * ONE_MB; // Ignore 16MB allocated for C6 when finding UMA size
if ((msr2.hi & 0x0000000F) || (sys_mem >= 2048 * ONE_MB)) {
uma_memory_size = 512 * ONE_MB;
} else if (sys_mem >= 1024 * ONE_MB) {
uma_memory_size = 256 * ONE_MB;
sys_mem = msr.lo + (16 << ONE_MB_SHIFT); // Ignore 16MB allocated for C6 when finding UMA size
if ((msr2.hi & 0x0000000F) || (sys_mem >= 2048 << ONE_MB_SHIFT)) {
uma_memory_size = 512 << ONE_MB_SHIFT;
} else if (sys_mem >= 1024 << ONE_MB_SHIFT) {
uma_memory_size = 256 << ONE_MB_SHIFT;
} else {
uma_memory_size = 64 * ONE_MB;
uma_memory_size = 64 << ONE_MB_SHIFT;
}
uma_memory_base = msr.lo - uma_memory_size; /* TOP_MEM1 */
@ -678,8 +678,8 @@ void setup_uma_memory(void)
/* TODO: TOP_MEM2 */
#else
uma_memory_size = 256 * ONE_MB; /* 256M recommended UMA */
uma_memory_base = 768 * ONE_MB; /* 1GB system memory supported */
uma_memory_size = 256 << ONE_MB_SHIFT; /* 256M recommended UMA */
uma_memory_base = 768 << ONE_MB_SHIFT; /* 1GB system memory supported */
#endif
}