[POWERPC] 4xx: Add PPC4xx L2-cache support (440GX)

This patch adds support for the 256k L2 cache found on some IBM/AMCC
4xx PPC's. It introduces a common 4xx SoC file (sysdev/ppc4xx_soc.c)
which currently "only" adds the L2 cache init code. Other common 4xx
stuff can be added later here.

The L2 cache handling code is a copy of Eugene's code in arch/ppc
with small modifications.

Tested on AMCC Taishan 440GX.

Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>

1 files changed, 78 insertions, 0 deletions

diff --git a/include/asm-powerpc/dcr-regs.h b/include/asm-powerpc/dcr-regs.h
index 9f1fb98fcdc..29b0ecef980 100644
--- a/include/asm-powerpc/dcr-regs.h
+++ b/include/asm-powerpc/dcr-regs.h
@@ -68,4 +68,82 @@
 #define SDR0_UART3              0x0123
 #define SDR0_CUST0              0x4000
 
+/*
+ * All those DCR register addresses are offsets from the base address
+ * for the SRAM0 controller (e.g. 0x20 on 440GX). The base address is
+ * excluded here and configured in the device tree.
+ */
+#define DCRN_SRAM0_SB0CR        0x00
+#define DCRN_SRAM0_SB1CR        0x01
+#define DCRN_SRAM0_SB2CR        0x02
+#define DCRN_SRAM0_SB3CR        0x03
+#define  SRAM_SBCR_BU_MASK      0x00000180
+#define  SRAM_SBCR_BS_64KB      0x00000800
+#define  SRAM_SBCR_BU_RO        0x00000080
+#define  SRAM_SBCR_BU_RW        0x00000180
+#define DCRN_SRAM0_BEAR         0x04
+#define DCRN_SRAM0_BESR0        0x05
+#define DCRN_SRAM0_BESR1        0x06
+#define DCRN_SRAM0_PMEG         0x07
+#define DCRN_SRAM0_CID          0x08
+#define DCRN_SRAM0_REVID        0x09
+#define DCRN_SRAM0_DPC          0x0a
+#define  SRAM_DPC_ENABLE        0x80000000
+
+/*
+ * All those DCR register addresses are offsets from the base address
+ * for the SRAM0 controller (e.g. 0x30 on 440GX). The base address is
+ * excluded here and configured in the device tree.
+ */
+#define DCRN_L2C0_CFG           0x00
+#define  L2C_CFG_L2M            0x80000000
+#define  L2C_CFG_ICU            0x40000000
+#define  L2C_CFG_DCU            0x20000000
+#define  L2C_CFG_DCW_MASK       0x1e000000
+#define  L2C_CFG_TPC            0x01000000
+#define  L2C_CFG_CPC            0x00800000
+#define  L2C_CFG_FRAN           0x00200000
+#define  L2C_CFG_SS_MASK        0x00180000
+#define  L2C_CFG_SS_256         0x00000000
+#define  L2C_CFG_CPIM           0x00040000
+#define  L2C_CFG_TPIM           0x00020000
+#define  L2C_CFG_LIM            0x00010000
+#define  L2C_CFG_PMUX_MASK      0x00007000
+#define  L2C_CFG_PMUX_SNP       0x00000000
+#define  L2C_CFG_PMUX_IF        0x00001000
+#define  L2C_CFG_PMUX_DF        0x00002000
+#define  L2C_CFG_PMUX_DS        0x00003000
+#define  L2C_CFG_PMIM           0x00000800
+#define  L2C_CFG_TPEI           0x00000400
+#define  L2C_CFG_CPEI           0x00000200
+#define  L2C_CFG_NAM            0x00000100
+#define  L2C_CFG_SMCM           0x00000080
+#define  L2C_CFG_NBRM           0x00000040
+#define  L2C_CFG_RDBW           0x00000008      /* only 460EX/GT */
+#define DCRN_L2C0_CMD           0x01
+#define  L2C_CMD_CLR            0x80000000
+#define  L2C_CMD_DIAG           0x40000000
+#define  L2C_CMD_INV            0x20000000
+#define  L2C_CMD_CCP            0x10000000
+#define  L2C_CMD_CTE            0x08000000
+#define  L2C_CMD_STRC           0x04000000
+#define  L2C_CMD_STPC           0x02000000
+#define  L2C_CMD_RPMC           0x01000000
+#define  L2C_CMD_HCC            0x00800000
+#define DCRN_L2C0_ADDR          0x02
+#define DCRN_L2C0_DATA          0x03
+#define DCRN_L2C0_SR            0x04
+#define  L2C_SR_CC              0x80000000
+#define  L2C_SR_CPE             0x40000000
+#define  L2C_SR_TPE             0x20000000
+#define  L2C_SR_LRU             0x10000000
+#define  L2C_SR_PCS             0x08000000
+#define DCRN_L2C0_REVID         0x05
+#define DCRN_L2C0_SNP0          0x06
+#define DCRN_L2C0_SNP1          0x07
+#define  L2C_SNP_BA_MASK        0xffff0000
+#define  L2C_SNP_SSR_MASK       0x0000f000
+#define  L2C_SNP_SSR_32G        0x0000f000
+#define  L2C_SNP_ESR            0x00000800
+
 #endif /* __DCR_REGS_H__ */