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authorzbao <fishbaozi@gmail.com>2012-07-23 19:44:29 +0800
committerStefan Reinauer <stefan.reinauer@coreboot.org>2012-07-25 22:15:17 +0200
commit405cfe219a77895692aa50a1e8416c2607402c39 (patch)
tree545f0eac702bc18d75363c4ce86dc405490c0126 /src
parentace7a6aadd9bc07de1e7570ef973ad25bdae577e (diff)
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>
Diffstat (limited to 'src')
-rw-r--r--src/northbridge/amd/agesa/family15tn/northbridge.c18
1 files changed, 9 insertions, 9 deletions
diff --git a/src/northbridge/amd/agesa/family15tn/northbridge.c b/src/northbridge/amd/agesa/family15tn/northbridge.c
index c7a87dbe5a..bc3877fb02 100644
--- a/src/northbridge/amd/agesa/family15tn/northbridge.c
+++ b/src/northbridge/amd/agesa/family15tn/northbridge.c
@@ -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
}