diff mbox series

[U-Boot,v3,051/108] x86: Set up the MTRR for SDRAM

Message ID 20191021033913.220758-51-sjg@chromium.org
State Superseded
Delegated to: Bin Meng
Headers show
Series x86: Add initial support for apollolake | expand

Commit Message

Simon Glass Oct. 21, 2019, 3:38 a.m. UTC 
Set up MTRRs for the FST SDRAM regions to improve performance.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

Changes in v3:
- Move mtrr_add_request() call into this patch

Changes in v2: None

 arch/x86/lib/fsp/fsp_dram.c | 5 +++++
 1 file changed, 5 insertions(+)

Comments

Bin Meng Nov. 19, 2019, 2:23 a.m. UTC | #1 
On Mon, Oct 21, 2019 at 11:40 AM Simon Glass <sjg@chromium.org> wrote:
>
> Set up MTRRs for the FST SDRAM regions to improve performance.

typo: FST -> FSP

>
> Signed-off-by: Simon Glass <sjg@chromium.org>
> ---
>
> Changes in v3:
> - Move mtrr_add_request() call into this patch
>
> Changes in v2: None
>
>  arch/x86/lib/fsp/fsp_dram.c | 5 +++++
>  1 file changed, 5 insertions(+)
>

Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff mbox series

Patch

diff --git a/arch/x86/lib/fsp/fsp_dram.c b/arch/x86/lib/fsp/fsp_dram.c
index 3ede9b73fe2..9ca898a0cd3 100644
--- a/arch/x86/lib/fsp/fsp_dram.c
+++ b/arch/x86/lib/fsp/fsp_dram.c
@@ -8,6 +8,7 @@ 
 #include <asm/fsp/fsp_support.h>
 #include <asm/e820.h>
 #include <asm/mrccache.h>
+#include <asm/mtrr.h>
 #include <asm/post.h>
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -60,6 +61,8 @@  int dram_init_banksize(void)
 
 		gd->bd->bi_dram[bank].start = res_desc->phys_start;
 		gd->bd->bi_dram[bank].size = res_desc->len;
+		mtrr_add_request(MTRR_TYPE_WRBACK, res_desc->phys_start,
+				 res_desc->len);
 		log_debug("ram %llx %llx\n", gd->bd->bi_dram[bank].start,
 			  gd->bd->bi_dram[bank].size);
 	}
@@ -68,6 +71,8 @@  int dram_init_banksize(void)
 	gd->bd->bi_dram[0].start = 0;
 	gd->bd->bi_dram[0].size = low_end;
 
+	mtrr_add_request(MTRR_TYPE_WRBACK, 0, low_end);
+
 	return 0;
 }