APM821xx: Add CPU support

APM821XX is a new line of SoCs which are derivatives of
PPC44X family of processors. This patch adds support of CPU, cache,
tlb, 32k ocm, bootstraps, PLB and AHB bus.

Signed-off-by: Tirumala R Marri <tmarri@apm.com>
Signed-off-by: Stefan Roese <sr@denx.de>

7 files changed, 99 insertions, 12 deletions

diff --git a/arch/powerpc/include/asm/apm821xx.h b/arch/powerpc/include/asm/apm821xx.h
new file mode 100644
index 0000000..8841bc9
--- /dev/null
+++ b/arch/powerpc/include/asm/apm821xx.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2010, Applied Micro Circuits Corporation
+ * Author: Tirumala R Marri <tmarri@apm.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef _APM821XX_H_
+#define _APM821XX_H_
+
+#define CONFIG_SDRAM_PPC4xx_IBM_DDR2	/* IBM DDR(2) controller */
+
+/* Memory mapped registers */
+#define CONFIG_SYS_PERIPHERAL_BASE	0xEF600000
+#define CONFIG_SYS_NS16550_COM1	(CONFIG_SYS_PERIPHERAL_BASE + 0x0200)
+#define CONFIG_SYS_NS16550_COM2	(CONFIG_SYS_PERIPHERAL_BASE + 0x0300)
+
+#define GPIO0_BASE		(CONFIG_SYS_PERIPHERAL_BASE + 0x0700)
+
+#define SDR0_SRST0_DMC		0x00200000
+#define SDR0_SRST1_AHB		0x00000040      /* PLB4XAHB bridge */
+
+/* AHB config. */
+#define AHB_TOP			0xA4
+#define AHB_BOT			0xA5
+
+/* clk divisors */
+#define PLLSYS0_FWD_DIV_A_MASK	0x000000f0	/* Fwd Div A */
+#define PLLSYS0_FWD_DIV_B_MASK	0x0000000f	/* Fwd Div B */
+#define PLLSYS0_FB_DIV_MASK	0x0000ff00	/* Feedback divisor */
+#define PLLSYS0_OPB_DIV_MASK	0x0c000000	/* OPB Divisor */
+#define PLLSYS0_EPB_DIV_MASK	0x00000300      /* EPB divisor */
+#define PLLSYS0_EXTSL_MASK	0x00000080      /* PerClk feedback path */
+#define PLLSYS0_PLBEDV0_DIV_MASK	0xe0000000/* PLB Early Clk Div*/
+#define PLLSYS0_PERCLK_DIV_MASK	0x03000000	/* Peripheral Clk Divisor */
+#define PLLSYS0_SEL_MASK	0x18000000	/* 0 = PLL, 1 = PerClk */
+
+/*
+   + * Clocking Controller
+   + */
+#define CPR0_CLKUPD	0x0020
+#define CPR0_PLLC	0x0040
+#define CPR0_PLLC_SEL(pllc)		(((pllc) & 0x01000000) >> 24)
+#define CPR0_PLLD	0x0060
+#define CPR0_PLLD_FDV(plld)		(((plld) & 0xff000000) >> 24)
+#define CPR0_PLLD_FWDVA(plld)		(((plld) & 0x000f0000) >> 16)
+#define CPR0_CPUD	0x0080
+#define CPR0_CPUD_CPUDV(cpud)		(((cpud) & 0x07000000) >> 24)
+#define CPR0_PLB2D	0x00a0
+#define CPR0_PLB2D_PLB2DV(plb2d)	(((plb2d) & 0x06000000) >> 25)
+#define CPR0_OPBD	0x00c0
+#define CPR0_OPBD_OPBDV(opbd)		(((opbd) & 0x03000000) >> 24)
+#define CPR0_PERD	0x00e0
+#define CPR0_PERD_PERDV(perd)		(((perd) & 0x03000000) >> 24)
+#define CPR0_DDR2D	0x0100
+#define CPR0_DDR2D_DDR2DV(ddr2d) 	(((ddr2d) & 0x06000000) >> 25)
+#define CLK_ICFG	0x0140
+
+#endif /* _APM821XX_H_ */
diff --git a/arch/powerpc/include/asm/ppc4xx-ebc.h b/arch/powerpc/include/asm/ppc4xx-ebc.h
index 9c17e46..75af130 100644
--- a/arch/powerpc/include/asm/ppc4xx-ebc.h
+++ b/arch/powerpc/include/asm/ppc4xx-ebc.h
@@ -69,7 +69,8 @@
 #define EBC_NUM_BANKS	6
 #endif
 
-#if defined(CONFIG_440SP) || defined(CONFIG_440SPE)
+#if defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
+    defined(CONFIG_APM821XX)
 #define EBC_NUM_BANKS	3
 #endif
 
diff --git a/arch/powerpc/include/asm/ppc4xx-isram.h b/arch/powerpc/include/asm/ppc4xx-isram.h
index d6d17ac..32e1297 100644
--- a/arch/powerpc/include/asm/ppc4xx-isram.h
+++ b/arch/powerpc/include/asm/ppc4xx-isram.h
@@ -25,7 +25,8 @@
 /*
  * Internal SRAM
  */
-#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
+#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
+    defined(CONFIG_APM821XX)
 #define ISRAM0_DCR_BASE 0x380
 #else
 #define ISRAM0_DCR_BASE 0x020
@@ -42,7 +43,8 @@
 #define ISRAM0_REVID	(ISRAM0_DCR_BASE+0x09)	/* SRAM bus revision id reg */
 #define ISRAM0_DPC	(ISRAM0_DCR_BASE+0x0a)	/* SRAM data parity check reg */
 
-#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
+#if defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
+    defined(CONFIG_APM821XX)
 #define ISRAM1_DCR_BASE 0x0B0
 #define ISRAM1_SB0CR	(ISRAM1_DCR_BASE+0x00)	/* SRAM1 bank config 0*/
 #define ISRAM1_BEAR	(ISRAM1_DCR_BASE+0x04)	/* SRAM1 bus error addr reg */
@@ -54,13 +56,19 @@
 #define ISRAM1_DPC	(ISRAM1_DCR_BASE+0x0a)	/* SRAM1 data parity check reg */
 #endif /* CONFIG_460EX || CONFIG_460GT */
 
+#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
+#define ISRAM1_SIZE 0x0984 /* OCM size 64k */
+#elif defined(CONFIG_APM821XX)
+#define ISRAM1_SIZE 0x0784 /* OCM size 32k */
+#endif
+
 /*
  * L2 Cache
  */
 #if defined (CONFIG_440GX) || \
     defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
     defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
-    defined(CONFIG_460SX)
+    defined(CONFIG_460SX) || defined(CONFIG_APM821XX)
 #define L2_CACHE_BASE	0x030
 #define L2_CACHE_CFG	(L2_CACHE_BASE+0x00)	/* L2 Cache Config      */
 #define L2_CACHE_CMD	(L2_CACHE_BASE+0x01)	/* L2 Cache Command     */
diff --git a/arch/powerpc/include/asm/ppc4xx-sdram.h b/arch/powerpc/include/asm/ppc4xx-sdram.h
index ac150c2..d570d79 100644
--- a/arch/powerpc/include/asm/ppc4xx-sdram.h
+++ b/arch/powerpc/include/asm/ppc4xx-sdram.h
@@ -292,7 +292,7 @@
  */
 #if defined(CONFIG_440SPE) || \
     defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
-    defined(CONFIG_460SX)
+    defined(CONFIG_460SX) || defined(CONFIG_APM821XX)
 #define SDRAM_RXBAS_SDBA_MASK		0xFFE00000	/* Base address	*/
 #define SDRAM_RXBAS_SDBA_ENCODE(n)	((u32)(((phys_size_t)(n) >> 2) & 0xFFE00000))
 #define SDRAM_RXBAS_SDBA_DECODE(n)	((((phys_size_t)(n)) & 0xFFE00000) << 2)
@@ -365,7 +365,7 @@
 /*
  * Memory controller registers
  */
-#ifdef CONFIG_405EX
+#if defined(CONFIG_405EX) || defined(CONFIG_APM821XX)
 #define SDRAM_BESR	0x00	/* PLB bus error status (read/clear)         */
 #define SDRAM_BESRT	0x01	/* PLB bus error status (test/set)           */
 #define SDRAM_BEARL	0x02	/* PLB bus error address low                 */
@@ -375,9 +375,9 @@
 #define SDRAM_PLBOPT	0x08	/* PLB slave options                         */
 #define SDRAM_PUABA	0x09	/* PLB upper address base                    */
 #define SDRAM_MCSTAT	0x1F	/* memory controller status                  */
-#else /* CONFIG_405EX */
+#else /* CONFIG_405EX || CONFIG_APM821XX */
 #define SDRAM_MCSTAT	0x14	/* memory controller status                  */
-#endif /* CONFIG_405EX */
+#endif /* CONFIG_405EX || CONFIG_APM821XX */
 #define SDRAM_MCOPT1	0x20	/* memory controller options 1               */
 #define SDRAM_MCOPT2	0x21	/* memory controller options 2               */
 #define SDRAM_MODT0	0x22	/* on die termination for bank 0             */
@@ -423,12 +423,12 @@
 #define SDRAM_MEMODE	0x89	/* memory extended mode                      */
 #define SDRAM_ECCES	0x98	/* ECC error status                          */
 #define SDRAM_CID	0xA4	/* core ID                                   */
-#ifndef CONFIG_405EX
+#if !defined(CONFIG_405EX) && !defined(CONFIG_APM821XX)
 #define SDRAM_RID	0xA8	/* revision ID                               */
 #endif
 #define SDRAM_FCSR	0xB0	/* feedback calibration status               */
 #define SDRAM_RTSR	0xB1	/* run time status tracking                  */
-#ifdef CONFIG_405EX
+#if  defined(CONFIG_405EX) || defined(CONFIG_APM821XX)
 #define SDRAM_RID	0xF8	/* revision ID                               */
 #endif
 
diff --git a/arch/powerpc/include/asm/ppc4xx-uic.h b/arch/powerpc/include/asm/ppc4xx-uic.h
index 782d045..3714a0a 100644
--- a/arch/powerpc/include/asm/ppc4xx-uic.h
+++ b/arch/powerpc/include/asm/ppc4xx-uic.h
@@ -31,7 +31,7 @@
  */
 #if defined(CONFIG_440GX) || defined(CONFIG_440SPE) || \
     defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
-    defined(CONFIG_460SX)
+    defined(CONFIG_460SX) || defined(CONFIG_APM821XX)
 #define UIC_MAX		4
 #elif defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
     defined(CONFIG_405EX)
@@ -252,7 +252,8 @@
 #define VECNUM_ETH0		(32 + 28)
 #endif /* CONFIG_440SPE */
 
-#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
+#if defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
+    defined(CONFIG_APM821XX)
 /* UIC 0 */
 #define VECNUM_UIC2NCI		10
 #define VECNUM_UIC2CI		11
diff --git a/arch/powerpc/include/asm/ppc4xx.h b/arch/powerpc/include/asm/ppc4xx.h
index 87a16ec..1b98f8b 100644
--- a/arch/powerpc/include/asm/ppc4xx.h
+++ b/arch/powerpc/include/asm/ppc4xx.h
@@ -79,6 +79,10 @@
 #include <asm/ppc460sx.h>
 #endif
 
+#if defined(CONFIG_APM821XX)
+#include <asm/apm821xx.h>
+#endif
+
 /*
  * Configure which SDRAM/DDR/DDR2 controller is equipped
  */
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h
index 84a1e2e..9cafe85 100644
--- a/arch/powerpc/include/asm/processor.h
+++ b/arch/powerpc/include/asm/processor.h
@@ -916,6 +916,7 @@
 #define PVR_460SX_RA_V1 0x13541801 /* 460SX rev A Variant 1 Security disabled */
 #define PVR_460GX_RA    0x13541802 /* 460GX rev A                   */
 #define PVR_460GX_RA_V1 0x13541803 /* 460GX rev A Variant 1 Security disabled */
+#define PVR_APM821XX_RA 0x12C41C80 /* APM821XX rev A */
 #define PVR_601		0x00010000
 #define PVR_602		0x00050000
 #define PVR_603		0x00030000