ppc4xx: Optimize PLB4 Arbiter and Memory Queue settings for PPC440SP/SPe,

	PPC405EX and PPC460EX/GT/SX

- Read pipeline depth set to 4 for PPC440SP/SPE, PPC405EX, PPC460EX/GT/SX
  processors
- Moved PLB4 Arbiter register definitions to ppc4xx.h since it is shared
  across processors (405 and 440/460)
- Optimize Memory Queue settings for PPC440SP/SPE and PPC460EX/GT/SX
  processors
- Add register bit definitions for Memory Queue Configuration registers

Signed-off-by: Prodyut Hazarika <phazarika@amcc.com>
Signed-off-by: Stefan Roese <sr@denx.de>

5 files changed, 127 insertions, 69 deletions

diff --git a/cpu/ppc4xx/44x_spd_ddr2.c b/cpu/ppc4xx/44x_spd_ddr2.c
index 1c36324..c7ed161 100644
--- a/cpu/ppc4xx/44x_spd_ddr2.c
+++ b/cpu/ppc4xx/44x_spd_ddr2.c
@@ -2172,6 +2172,11 @@ static void program_memory_queue(unsigned long *dimm_populated,
 	unsigned long i;
 	unsigned long bank_0_populated = 0;
 	phys_size_t total_size = 0;
+#if defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
+    defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
+    defined(CONFIG_460SX)
+	unsigned long val;
+#endif
 
 	/*------------------------------------------------------------------
 	 * Reset the rank_base_address.
@@ -2249,17 +2254,31 @@ static void program_memory_queue(unsigned long *dimm_populated,
 		}
 	}
 
-#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
+#if defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
+    defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
+    defined(CONFIG_460SX)
+
 	/*
-	 * Enable high bandwidth access on 460EX/GT.
-	 * This should/could probably be done on other
-	 * PPC's too, like 440SPe.
+	 * Enable high bandwidth access
 	 * This is currently not used, but with this setup
 	 * it is possible to use it later on in e.g. the Linux
 	 * EMAC driver for performance gain.
 	 */
 	mtdcr(SDRAM_PLBADDULL, 0x00000000); /* MQ0_BAUL */
 	mtdcr(SDRAM_PLBADDUHB, 0x00000008); /* MQ0_BAUH */
+
+	/*
+	 * Set optimal value for Memory Queue HB/LL Configuration registers
+	 */
+
+	val = (mfdcr(SDRAM_CONF1HB) | SDRAM_CONF1HB_AAFR | SDRAM_CONF1HB_RPEN | SDRAM_CONF1HB_RFTE);
+	mtdcr(SDRAM_CONF1HB, val);
+
+	val = (mfdcr(SDRAM_CONF1LL) | SDRAM_CONF1LL_AAFR | SDRAM_CONF1LL_RPEN | SDRAM_CONF1LL_RFTE);
+	mtdcr(SDRAM_CONF1LL, val);
+
+	val = (mfdcr(SDRAM_CONFPATHB) | SDRAM_CONFPATHB_TPEN);
+	mtdcr(SDRAM_CONFPATHB, val);
 #endif
 }
 
diff --git a/cpu/ppc4xx/cpu_init.c b/cpu/ppc4xx/cpu_init.c
index e2d0402..281819a 100644
--- a/cpu/ppc4xx/cpu_init.c
+++ b/cpu/ppc4xx/cpu_init.c
@@ -138,7 +138,9 @@ void reconfigure_pll(u32 new_cpu_freq)
 void
 cpu_init_f (void)
 {
-#if defined(CONFIG_WATCHDOG) || defined(CONFIG_440GX) || defined(CONFIG_460EX)
+#if defined(CONFIG_WATCHDOG) || defined(CONFIG_440GX) || defined(CONFIG_460EX) || \
+    defined(CONFIG_440SP) || defined(CONFIG_440SPE) || defined(CONFIG_405EX)   || \
+    defined(CONFIG_460GT) || defined(CONFIG_460SX)
 	u32 val;
 #endif
 
@@ -301,6 +303,18 @@ cpu_init_f (void)
 	val |= 0x400;
 	mtsdr(SDR0_USB2HOST_CFG, val);
 #endif /* CONFIG_460EX */
+
+#if defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
+    defined(CONFIG_460EX) || defined(CONFIG_460GT)  || \
+    defined(CONFIG_405EX) || defined(CONFIG_460SX)
+	/*
+	 * Set PLB4 arbiter (Segment 0 and 1) to 4 deep pipeline read
+	 */
+	val = (mfdcr(plb0_acr) & ~plb0_acr_rdp_mask) | plb0_acr_rdp_4deep;
+	mtdcr(plb0_acr, val);
+	val = (mfdcr(plb1_acr) & ~plb1_acr_rdp_mask) | plb1_acr_rdp_4deep;
+	mtdcr(plb1_acr, val);
+#endif /* CONFIG_440SP/SPE || CONFIG_460EX/GT || CONFIG_405EX */
 }
 
 /*
diff --git a/include/asm-ppc/ppc4xx-sdram.h b/include/asm-ppc/ppc4xx-sdram.h
index df787b3..0174d62 100644
--- a/include/asm-ppc/ppc4xx-sdram.h
+++ b/include/asm-ppc/ppc4xx-sdram.h
@@ -259,23 +259,39 @@
 /*
  * Memory queue defines
  */
-#define SDRAMQ_DCR_BASE	0x040
-
-#define SDRAM_R0BAS	(SDRAMQ_DCR_BASE+0x0)	/* rank 0 base address & size  */
-#define SDRAM_R1BAS	(SDRAMQ_DCR_BASE+0x1)	/* rank 1 base address & size  */
-#define SDRAM_R2BAS	(SDRAMQ_DCR_BASE+0x2)	/* rank 2 base address & size  */
-#define SDRAM_R3BAS	(SDRAMQ_DCR_BASE+0x3)	/* rank 3 base address & size  */
-#define SDRAM_CONF1HB	(SDRAMQ_DCR_BASE+0x5)	/* configuration 1 HB          */
-#define SDRAM_ERRSTATHB	(SDRAMQ_DCR_BASE+0x7)	/* error status HB             */
-#define SDRAM_ERRADDUHB	(SDRAMQ_DCR_BASE+0x8)	/* error address upper 32 HB   */
-#define SDRAM_ERRADDLHB	(SDRAMQ_DCR_BASE+0x9)	/* error address lower 32 HB   */
-#define SDRAM_PLBADDULL	(SDRAMQ_DCR_BASE+0xA)	/* PLB base address upper 32 LL */
-#define SDRAM_CONF1LL	(SDRAMQ_DCR_BASE+0xB)	/* configuration 1 LL          */
-#define SDRAM_ERRSTATLL	(SDRAMQ_DCR_BASE+0xC)	/* error status LL             */
-#define SDRAM_ERRADDULL	(SDRAMQ_DCR_BASE+0xD)	/* error address upper 32 LL   */
-#define SDRAM_ERRADDLLL	(SDRAMQ_DCR_BASE+0xE)	/* error address lower 32 LL   */
-#define SDRAM_CONFPATHB	(SDRAMQ_DCR_BASE+0xF)	/* configuration between paths */
-#define SDRAM_PLBADDUHB	(SDRAMQ_DCR_BASE+0x10)	/* PLB base address upper 32 LL */
+#define SDRAMQ_DCR_BASE 0x040
+
+#define SDRAM_R0BAS		(SDRAMQ_DCR_BASE+0x0)	/* rank 0 base address & size  */
+#define SDRAM_R1BAS		(SDRAMQ_DCR_BASE+0x1)	/* rank 1 base address & size  */
+#define SDRAM_R2BAS		(SDRAMQ_DCR_BASE+0x2)	/* rank 2 base address & size  */
+#define SDRAM_R3BAS		(SDRAMQ_DCR_BASE+0x3)	/* rank 3 base address & size  */
+#define SDRAM_CONF1HB		(SDRAMQ_DCR_BASE+0x5)	/* configuration 1 HB          */
+#define SDRAM_CONF1HB_AAFR	0x80000000	/* Address Ack on First Request - Bit 0 */
+#define SDRAM_CONF1HB_PRPD	0x00080000	/* PLB Read pipeline Disable - Bit 12 */
+#define SDRAM_CONF1HB_PWPD	0x00040000	/* PLB Write pipeline Disable - Bit 13 */
+#define SDRAM_CONF1HB_PRW	0x00020000	/* PLB Read Wait - Bit 14 */
+#define SDRAM_CONF1HB_RPEN	0x00000800	/* Read Passing Enable - Bit 20 */
+#define SDRAM_CONF1HB_RFTE	0x00000400	/* Read Flow Through Enable - Bit 21 */
+
+#define SDRAM_ERRSTATHB		(SDRAMQ_DCR_BASE+0x7)	/* error status HB             */
+#define SDRAM_ERRADDUHB		(SDRAMQ_DCR_BASE+0x8)	/* error address upper 32 HB   */
+#define SDRAM_ERRADDLHB		(SDRAMQ_DCR_BASE+0x9)	/* error address lower 32 HB   */
+#define SDRAM_PLBADDULL		(SDRAMQ_DCR_BASE+0xA)	/* PLB base address upper 32 LL */
+#define SDRAM_CONF1LL		(SDRAMQ_DCR_BASE+0xB)	/* configuration 1 LL          */
+#define SDRAM_CONF1LL_AAFR	0x80000000		/* Address Ack on First Request - Bit 0 */
+#define SDRAM_CONF1LL_PRPD	0x00080000		/* PLB Read pipeline Disable - Bit 12 */
+#define SDRAM_CONF1LL_PWPD	0x00040000		/* PLB Write pipeline Disable - Bit 13 */
+#define SDRAM_CONF1LL_PRW	0x00020000		/* PLB Read Wait - Bit 14 */
+#define SDRAM_CONF1LL_RPEN	0x00000800		/* Read Passing Enable - Bit 20 */
+#define SDRAM_CONF1LL_RFTE	0x00000400		/* Read Flow Through Enable - Bit 21 */
+
+#define SDRAM_ERRSTATLL		(SDRAMQ_DCR_BASE+0xC)	/* error status LL             */
+#define SDRAM_ERRADDULL		(SDRAMQ_DCR_BASE+0xD)	/* error address upper 32 LL   */
+#define SDRAM_ERRADDLLL		(SDRAMQ_DCR_BASE+0xE)	/* error address lower 32 LL   */
+#define SDRAM_CONFPATHB		(SDRAMQ_DCR_BASE+0xF)	/* configuration between paths */
+#define SDRAM_CONFPATHB_TPEN	0x08000000		/* Transaction Passing Enable - Bit 4 */
+
+#define SDRAM_PLBADDUHB		(SDRAMQ_DCR_BASE+0x10)  /* PLB base address upper 32 LL */
 
 #if !defined(CONFIG_405EX)
 /*
diff --git a/include/ppc440.h b/include/ppc440.h
index 92db15f..3584fd2 100644
--- a/include/ppc440.h
+++ b/include/ppc440.h
@@ -341,53 +341,6 @@
 
 #define PLB4_ACR_WRP		(0x80000000 >> 7)
 
-/* Nebula PLB4 Arbiter - PowerPC440EP */
-#define PLB_ARBITER_BASE   0x80
-
-#define plb0_revid                (PLB_ARBITER_BASE+ 0x00)
-#define plb0_acr                  (PLB_ARBITER_BASE+ 0x01)
-#define   plb0_acr_ppm_mask             0xF0000000
-#define   plb0_acr_ppm_fixed            0x00000000
-#define   plb0_acr_ppm_fair             0xD0000000
-#define   plb0_acr_hbu_mask             0x08000000
-#define   plb0_acr_hbu_disabled         0x00000000
-#define   plb0_acr_hbu_enabled          0x08000000
-#define   plb0_acr_rdp_mask             0x06000000
-#define   plb0_acr_rdp_disabled         0x00000000
-#define   plb0_acr_rdp_2deep            0x02000000
-#define   plb0_acr_rdp_3deep            0x04000000
-#define   plb0_acr_rdp_4deep            0x06000000
-#define   plb0_acr_wrp_mask             0x01000000
-#define   plb0_acr_wrp_disabled         0x00000000
-#define   plb0_acr_wrp_2deep            0x01000000
-
-#define plb0_besrl                (PLB_ARBITER_BASE+ 0x02)
-#define plb0_besrh                (PLB_ARBITER_BASE+ 0x03)
-#define plb0_bearl                (PLB_ARBITER_BASE+ 0x04)
-#define plb0_bearh                (PLB_ARBITER_BASE+ 0x05)
-#define plb0_ccr                  (PLB_ARBITER_BASE+ 0x08)
-
-#define plb1_acr                  (PLB_ARBITER_BASE+ 0x09)
-#define   plb1_acr_ppm_mask             0xF0000000
-#define   plb1_acr_ppm_fixed            0x00000000
-#define   plb1_acr_ppm_fair             0xD0000000
-#define   plb1_acr_hbu_mask             0x08000000
-#define   plb1_acr_hbu_disabled         0x00000000
-#define   plb1_acr_hbu_enabled          0x08000000
-#define   plb1_acr_rdp_mask             0x06000000
-#define   plb1_acr_rdp_disabled         0x00000000
-#define   plb1_acr_rdp_2deep            0x02000000
-#define   plb1_acr_rdp_3deep            0x04000000
-#define   plb1_acr_rdp_4deep            0x06000000
-#define   plb1_acr_wrp_mask             0x01000000
-#define   plb1_acr_wrp_disabled         0x00000000
-#define   plb1_acr_wrp_2deep            0x01000000
-
-#define plb1_besrl                (PLB_ARBITER_BASE+ 0x0A)
-#define plb1_besrh                (PLB_ARBITER_BASE+ 0x0B)
-#define plb1_bearl                (PLB_ARBITER_BASE+ 0x0C)
-#define plb1_bearh                (PLB_ARBITER_BASE+ 0x0D)
-
 /* Pin Function Control Register 1 */
 #define SDR0_PFC1                    0x4101
 #define   SDR0_PFC1_U1ME_MASK         0x02000000    /* UART1 Mode Enable */
diff --git a/include/ppc4xx.h b/include/ppc4xx.h
index c71da60..e1613dd 100644
--- a/include/ppc4xx.h
+++ b/include/ppc4xx.h
@@ -46,6 +46,62 @@
 #define CONFIG_SDRAM_PPC4xx_IBM_DDR2	/* IBM DDR(2) controller */
 #endif
 
+/* PLB4 CrossBar Arbiter Core supported across PPC4xx families */
+#if defined(CONFIG_405EX) || \
+    defined(CONFIG_440EP) || defined(CONFIG_440EPX) || \
+    defined(CONFIG_440GR) || defined(CONFIG_440GRX) || \
+    defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
+    defined(CONFIG_460EX) || defined(CONFIG_460GT)  || \
+    defined(CONFIG_460SX)
+
+#define PLB_ARBITER_BASE		0x80
+
+#define plb0_revid			(PLB_ARBITER_BASE+ 0x00)
+#define plb0_acr			(PLB_ARBITER_BASE+ 0x01)
+#define plb0_acr_ppm_mask		0xF0000000
+#define plb0_acr_ppm_fixed		0x00000000
+#define plb0_acr_ppm_fair		0xD0000000
+#define plb0_acr_hbu_mask		0x08000000
+#define plb0_acr_hbu_disabled		0x00000000
+#define plb0_acr_hbu_enabled		0x08000000
+#define plb0_acr_rdp_mask		0x06000000
+#define plb0_acr_rdp_disabled		0x00000000
+#define plb0_acr_rdp_2deep		0x02000000
+#define plb0_acr_rdp_3deep		0x04000000
+#define plb0_acr_rdp_4deep		0x06000000
+#define plb0_acr_wrp_mask		0x01000000
+#define plb0_acr_wrp_disabled		0x00000000
+#define plb0_acr_wrp_2deep		0x01000000
+
+#define plb0_besrl			(PLB_ARBITER_BASE+ 0x02)
+#define plb0_besrh			(PLB_ARBITER_BASE+ 0x03)
+#define plb0_bearl			(PLB_ARBITER_BASE+ 0x04)
+#define plb0_bearh			(PLB_ARBITER_BASE+ 0x05)
+#define plb0_ccr			(PLB_ARBITER_BASE+ 0x08)
+
+#define plb1_acr			(PLB_ARBITER_BASE+ 0x09)
+#define plb1_acr_ppm_mask		0xF0000000
+#define plb1_acr_ppm_fixed		0x00000000
+#define plb1_acr_ppm_fair		0xD0000000
+#define plb1_acr_hbu_mask		0x08000000
+#define plb1_acr_hbu_disabled		0x00000000
+#define plb1_acr_hbu_enabled		0x08000000
+#define plb1_acr_rdp_mask		0x06000000
+#define plb1_acr_rdp_disabled		0x00000000
+#define plb1_acr_rdp_2deep		0x02000000
+#define plb1_acr_rdp_3deep		0x04000000
+#define plb1_acr_rdp_4deep		0x06000000
+#define plb1_acr_wrp_mask		0x01000000
+#define plb1_acr_wrp_disabled		0x00000000
+#define plb1_acr_wrp_2deep		0x01000000
+
+#define plb1_besrl			(PLB_ARBITER_BASE+ 0x0A)
+#define plb1_besrh			(PLB_ARBITER_BASE+ 0x0B)
+#define plb1_bearl			(PLB_ARBITER_BASE+ 0x0C)
+#define plb1_bearh			(PLB_ARBITER_BASE+ 0x0D)
+
+#endif /* 440EP/EPX 440GR/GRX 440SP/SPE 460EX/GT/SX 405EX*/
+
 #if defined(CONFIG_440)
 /*
  * Enable long long (%ll ...) printf format on 440 PPC's since most of