[U-Boot,v4,08/16] powerpc: mpc8xx: redistribute data in CPM dpram
diff mbox series

Message ID 78576e00b1d7ce9a5ace74015b0dd6a5590f06c1.1521215903.git.christophe.leroy@c-s.fr
State Accepted
Delegated to: Tom Rini
Headers show
Series
  • Powerpc: mpc8xx: cleanup before migration to DM model
Related show

Commit Message

Christophe Leroy March 16, 2018, 4:20 p.m. UTC
Some malloc memory is needed at startup for DM model.
Lets reorganise the use of the CPM dpram.

The MPC866/885 dpram, we have 8kbytes dual port RAM, which is usable as:
IMMR + 0x2000..0x2800: BD/Data/Microcode
IMMR + 0x2800..0x2e00: BD/Data
IMMR + 0x2e00..0x3800: BD/Data/Microcode
IMMR + 0x3800..0x3a00: BD/Data
IMMR + 0x3a00..0x3c00: BD/Data/Microcode
IMMR + 0x3c00..0x4000: Parameters for the Peripheral Controllers

Lets reallocate all BDs in the 3800..3a00 area and give the full
2800..2e00 for dynamic RAM allocation including global data

That way, the microcode areas remain available if needed one day.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/include/asm/cpm_8xx.h | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

Comments

Tom Rini April 6, 2018, 9:03 p.m. UTC | #1
On Fri, Mar 16, 2018 at 05:20:45PM +0100, Christophe Leroy wrote:

> Some malloc memory is needed at startup for DM model.
> Lets reorganise the use of the CPM dpram.
> 
> The MPC866/885 dpram, we have 8kbytes dual port RAM, which is usable as:
> IMMR + 0x2000..0x2800: BD/Data/Microcode
> IMMR + 0x2800..0x2e00: BD/Data
> IMMR + 0x2e00..0x3800: BD/Data/Microcode
> IMMR + 0x3800..0x3a00: BD/Data
> IMMR + 0x3a00..0x3c00: BD/Data/Microcode
> IMMR + 0x3c00..0x4000: Parameters for the Peripheral Controllers
> 
> Lets reallocate all BDs in the 3800..3a00 area and give the full
> 2800..2e00 for dynamic RAM allocation including global data
> 
> That way, the microcode areas remain available if needed one day.
> 
> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>

Applied to u-boot/master, thanks!

Patch
diff mbox series

diff --git a/arch/powerpc/include/asm/cpm_8xx.h b/arch/powerpc/include/asm/cpm_8xx.h
index bd8adec6b07..85903d21088 100644
--- a/arch/powerpc/include/asm/cpm_8xx.h
+++ b/arch/powerpc/include/asm/cpm_8xx.h
@@ -51,14 +51,14 @@ 
 /*
  * DPRAM defines and allocation functions
  */
-#define CPM_SERIAL_BASE		0x0800
-#define CPM_I2C_BASE		0x0820
-#define CPM_SPI_BASE		0x0840
-#define CPM_FEC_BASE		0x0860
-#define CPM_SERIAL2_BASE	0x08E0
-#define CPM_SCC_BASE		0x0900
-#define CPM_POST_BASE		0x0980
-#define CPM_WLKBD_BASE		0x0a00
+#define CPM_SERIAL_BASE		0x1800
+#define CPM_I2C_BASE		0x1820
+#define CPM_SPI_BASE		0x1840
+#define CPM_FEC_BASE		0x1860
+#define CPM_SERIAL2_BASE	0x18e0
+#define CPM_SCC_BASE		0x1900
+#define CPM_POST_BASE		0x1980
+#define CPM_WLKBD_BASE		0x1a00
 
 #define BD_IIC_START	((uint) 0x0400) /* <- please use CPM_I2C_BASE !! */