diff options
| author | zbao <fishbaozi@gmail.com> | 2012-07-23 19:44:29 +0800 |
|---|---|---|
| committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2012-07-25 22:15:17 +0200 |
| commit | 405cfe219a77895692aa50a1e8416c2607402c39 (patch) | |
| tree | 545f0eac702bc18d75363c4ce86dc405490c0126 /src/northbridge/amd | |
| parent | ace7a6aadd9bc07de1e7570ef973ad25bdae577e (diff) | |
| download | coreboot-405cfe219a77895692aa50a1e8416c2607402c39.tar.xz | |
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/northbridge/amd')
| -rw-r--r-- | src/northbridge/amd/agesa/family15tn/northbridge.c | 18 |
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 } |