[U-Boot] [RFC][PATCH 22/36] eNET - Rearrange PAR assignments

[Graeme Russ]

---
 board/eNET/eNET.c      |   64 +++++++++++++++++++++++++++++++++++++----------
 include/configs/eNET.h |   31 +++++++++++++++++++++-
 2 files changed, 79 insertions(+), 16 deletions(-)

diff --git a/board/eNET/eNET.c b/board/eNET/eNET.c
index b4ef183..db3be5f 100644
--- a/board/eNET/eNET.c
+++ b/board/eNET/eNET.c
@@ -47,6 +47,7 @@ unsigned long monitor_flash_len = CONFIG_SYS_MONITOR_LEN;

 static void enet_timer_isr(void);
 static void enet_toggle_run_led(void);
+static void enet_setup_pars(void);

 /*
  * Miscellaneous platform dependent initializations
@@ -69,20 +70,7 @@ int board_early_init_f(void)
 	writew(0x200a, &sc520_mmcr->piopfs15_0);	/* GPIO pin function 15-0 reg */
 	writeb(0xf8, &sc520_mmcr->cspfs);		/* Chip Select Pin Function Select */

-	writel(CONFIG_SYS_SC520_UARTA_PAR, &sc520_mmcr->par[2]);
-	writel(CONFIG_SYS_SC520_UARTB_PAR, &sc520_mmcr->par[3]);
-	writel(CONFIG_SYS_SC520_UARTC_PAR, &sc520_mmcr->par[4]);
-	writel(CONFIG_SYS_SC520_UARTD_PAR, &sc520_mmcr->par[5]);
-	writel(CONFIG_SYS_SC520_SDRAM_PAR, &sc520_mmcr->par[6]);
-	writel(CONFIG_SYS_SC520_STRATA_FLASH1_PAR, &sc520_mmcr->par[7]);
-	writel(CONFIG_SYS_SC520_STRATA_FLASH2_PAR, &sc520_mmcr->par[8]);
-	writel(CONFIG_SYS_SC520_SRAM1_PAR, &sc520_mmcr->par[9]);
-	writel(CONFIG_SYS_SC520_SRAM2_PAR, &sc520_mmcr->par[10]);
-	writel(CONFIG_SYS_SC520_DPRAM_PAR, &sc520_mmcr->par[11]);
-	writel(CONFIG_SYS_SC520_CF1_PAR, &sc520_mmcr->par[12]);
-	writel(CONFIG_SYS_SC520_CF2_PAR, &sc520_mmcr->par[13]);
-/*	writel(CONFIG_SYS_SC520_BOOTCS_PAR, &sc520_mmcr->par14); */
-/*	writel(CONFIG_SYS_SC520_LLIO_PAR, &sc520_mmcr->par15); */
+	enet_setup_pars();

 	/* Disable Watchdog */
 	writew(0x3333, &sc520_mmcr->wdtmrctl);
@@ -112,6 +100,54 @@ int board_early_init_f(void)
 	return 0;
 }

+static void enet_setup_pars(void)
+{
+	/*
+	 * PARs 11 and 12 are 2MB SRAM @ 0x19000000
+	 *
+	 * These are setup now because older version of U-Boot have them
+	 * mapped to a different PAR which gets clobbered which prevents
+	 * using SRAM for warm-booting a new image
+	 */
+	writel(CONFIG_SYS_SC520_SRAM1_PAR, &sc520_mmcr->par[11]);
+	writel(CONFIG_SYS_SC520_SRAM2_PAR, &sc520_mmcr->par[12]);
+
+	/* PARs 0 and 1 are Compact Flash slots (4kB each) */
+	writel(CONFIG_SYS_SC520_CF1_PAR, &sc520_mmcr->par[0]);
+	writel(CONFIG_SYS_SC520_CF2_PAR, &sc520_mmcr->par[1]);
+
+	/* PAR 2 is used for Cache-As-RAM */
+
+	/* PARs 3 and 4 are SDRAM */
+	writel(SC520_SDRAM1_PAR, &sc520_mmcr->par[3]);
+	writel(SC520_SDRAM2_PAR, &sc520_mmcr->par[4]);
+
+	/*
+	 * PARs 5 through 8 are additional NS16550 UARTS
+	 * 8 bytes each @ 0x013f8, 0x012f8, 0x011f8 and 0x010f8
+	 */
+	writel(CONFIG_SYS_SC520_UARTA_PAR, &sc520_mmcr->par[5]);
+	writel(CONFIG_SYS_SC520_UARTB_PAR, &sc520_mmcr->par[6]);
+	writel(CONFIG_SYS_SC520_UARTC_PAR, &sc520_mmcr->par[7]);
+	writel(CONFIG_SYS_SC520_UARTD_PAR, &sc520_mmcr->par[8]);
+
+	/* PARs 9 and 10 are 32MB StrataFlash @ 0x10000000 */
+	writel(CONFIG_SYS_SC520_STRATA_FLASH1_PAR, &sc520_mmcr->par[9]);
+	writel(CONFIG_SYS_SC520_STRATA_FLASH2_PAR, &sc520_mmcr->par[10]);
+
+	/* PAR 13 is 4kB DPRAM @ 0x18100000 (implemented in FPGA) */
+	writel(CONFIG_SYS_SC520_DPRAM_PAR, &sc520_mmcr->par[13]);
+
+	/*
+	 * PAR 14 is Low Level I/O (LEDs, Hex Switches etc)
+	 * Already configured in board_init16 (eNET_start16.S)
+	 *
+	 * PAR 15 is Boot ROM
+	 * Already configured in board_init16 (eNET_start16.S)
+	 */
+}
+
+
 int board_early_init_r(void)
 {
 	/* CPU Speed to 100MHz */
diff --git a/include/configs/eNET.h b/include/configs/eNET.h
index de73434..9ad10de 100644
--- a/include/configs/eNET.h
+++ b/include/configs/eNET.h
@@ -341,8 +341,35 @@
 /* Dual-Port RAM - 4kB @ 0x18100000 on GPCS4 */
 #define CONFIG_SYS_SC520_DPRAM_PAR		0x50018100

-/* SDRAM - 128MB @ 0x00000000 */
-#define CONFIG_SYS_SC520_SDRAM_PAR		0xe3ffc000
+/*
+ * First 128MB of SDRAM RAM
+ *
+ * 111 0 0 0 1 11111111111 00000000000000 }- 0xe3ffc000
+ * \ / | | | | \----+----/ \-----+------/
+ *  |  | | | |      |            +---------- Start at 0x00000000
+ *  |  | | | |      +----------------------- 128MB Region Size ((2047 + 1) * 64kB)
+ *  |  | | | +------------------------------ 64kB Page Size
+ *  |  | | +-------------------------------- Writes Enabled
+ *  |  | +---------------------------------- Caching Enabled
+ *  |  +------------------------------------ Execution Enabled
+ *  +--------------------------------------- SDRAM
+ */
+#define SC520_SDRAM1_PAR	0xe3ffc000
+
+/*
+ * Second 128MB of SDRAM RAM
+ *
+ * 111 0 0 0 1 11111111111 00100000000000 }- 0xe3ffc800
+ * \ / | | | | \----+----/ \-----+------/
+ *  |  | | | |      |            +---------- Start at 0x08000000
+ *  |  | | | |      +----------------------- 128MB Region Size ((2047 + 1) * 64kB)
+ *  |  | | | +------------------------------ 64kB Page Size
+ *  |  | | +-------------------------------- Writes Enabled
+ *  |  | +---------------------------------- Caching Disabled
+ *  |  +------------------------------------ Execution Disabled
+ *  +--------------------------------------- SDRAM
+ */
+#define SC520_SDRAM2_PAR	0xe3ffc800

 #ifndef __ASSEMBLER__
 extern unsigned long ip;
--
1.7.1.422.g049e9