Prepare for SoC rework of ARM code:

- rename CONFIG_BOOTBINFUNC into  CONFIG_INIT_CRITICAL
- rename memsetup into lowlevel_init (function name and source files)

1 files changed, 212 insertions, 0 deletions

diff --git a/board/lpd7a40x/lowlevel_init.S b/board/lpd7a40x/lowlevel_init.S
new file mode 100644
index 0000000..b3ed55c
--- /dev/null
+++ b/board/lpd7a40x/lowlevel_init.S
@@ -0,0 +1,212 @@
+/*
+ * Memory Setup - initialize memory controller(s) for devices required
+ *                to boot and relocate
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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
+ */
+
+
+#include <config.h>
+#include <version.h>
+
+
+/* memory controller */
+#define BCRX_DEFAULT	(0x0000fbe0)
+#define BCRX_MW_8	(0x00000000)
+#define BCRX_MW_16	(0x10000000)
+#define BCRX_MW_32	(0x20000000)
+#define BCRX_PME	(0x08000000)
+#define BCRX_WP		(0x04000000)
+#define BCRX_WST2_SHIFT	(11)
+#define BCRX_WST1_SHIFT	(5)
+#define BCRX_IDCY_SHIFT	(0)
+
+/* Bank0 Async Flash */
+#define BCR0	   	(0x80002000)
+#define BCR0_FLASH	(BCRX_MW_32 | (0x08<<BCRX_WST2_SHIFT) | (0x0E<<BCRX_WST1_SHIFT))
+
+/* Bank1 Open */
+#define BCR1	(0x80002004)
+
+/* Bank2 Not used (EEPROM?) */
+#define BCR2	(0x80002008)
+
+/* Bank3 Not used */
+#define BCR3	(0x8000200C)
+
+/* Bank4 PC Card1 */
+
+/* Bank5 PC Card2 */
+
+/* Bank6 CPLD IO Controller Peripherals (slow) */
+#define BCR6	 	(0x80002018)
+#define BCR6_CPLD_SLOW	(BCRX_DEFAULT | BCRX_MW_16)
+
+/* Bank7 CPLD IO Controller Peripherals (fast) */
+#define BCR7		(0x8000201C)
+#define BCR7_CPLD_FAST	(BCRX_MW_16 | (0x16<<BCRX_WST2_SHIFT) | (0x16<<BCRX_WST1_SHIFT) | (0x2<<BCRX_IDCY_SHIFT))
+
+/* SDRAM */
+#define GBLCNFG		(0x80002404)
+#define GC_CKE		(0x80000000)
+#define GC_CKSD		(0x40000000)
+#define GC_LCR		(0x00000040)
+#define GC_SMEMBURST	(0x00000020)
+#define GC_MRS		(0x00000002)
+#define GC_INIT		(0x00000001)
+
+#define GC_CMD_NORMAL		(GC_CKE)
+#define GC_CMD_MODE		(GC_CKE | GC_MRS)
+#define GC_CMD_SYNCFLASH_LOAD	(GC_CKE | GC_MRS | GC_LCR)
+#define GC_CMD_PRECHARGEALL	(GC_CKE | GC_INIT)
+#define GC_CMD_NOP		(GC_CKE | GC_INIT | GC_MRS)
+
+#define RFSHTMR		(0x80002408)
+#define RFSHTMR_INIT	(10)	/* period=100 ns, HCLK=100Mhz, (2048+1-15.6*66) */
+#define RFSHTMR_NORMAL	(1500)	/* period=15.6 us, HCLK=100Mhz, (2048+1-15.6*66) */
+
+#define SDCSCX_BASE		(0x80002410)
+#define SDCSCX_DEFAULT		(0x01220008)
+#define SDCSCX_AUTOPC		(0x01000000)
+#define SDCSCX_RAS2CAS_2	(0x00200000)
+#define SDCSCX_RAS2CAS_3	(0x00300000)
+#define SDCSCX_WBL		(0x00080000)
+#define SDCSCX_CASLAT_8		(0x00070000)
+#define SDCSCX_CASLAT_7		(0x00060000)
+#define SDCSCX_CASLAT_6		(0x00050000)
+#define SDCSCX_CASLAT_5		(0x00040000)
+#define SDCSCX_CASLAT_4		(0x00030000)
+#define SDCSCX_CASLAT_3		(0x00020000)
+#define SDCSCX_CASLAT_2		(0x00010000)
+#define SDCSCX_2KPAGE		(0x00000040)
+#define SDCSCX_SROMLL		(0x00000020)
+#define SDCSCX_SROM512		(0x00000010)
+#define SDCSCX_4BNK		(0x00000008)
+#define SDCSCX_2BNK		(0x00000000)
+#define SDCSCX_EBW_16		(0x00000004)
+#define SDCSCX_EBW_32		(0x00000000)
+
+#define SDRAM_BASE		(0xC0000000)
+#define SDCSC_BANK_OFFSET	(0x10000000)
+
+/*
+ * The SDRAM DEVICE MODE PROGRAMMING VALUE
+ */
+#define BURST_LENGTH_4		(2 << 10)
+#define BURST_LENGTH_8		(3 << 10)
+#define WBURST_LENGTH_BL	(0 << 19)
+#define WBURST_LENGTH_SINGLE	(1 << 19)
+#define CAS_2			(2 << 14)
+#define CAS_3			(3 << 14)
+#define BAT_SEQUENTIAL		(0 << 13)
+#define BAT_INTERLEAVED		(1 << 13)
+#define OPM_NORMAL		(0 << 17)
+#define SDRAM_DEVICE_MODE	(WBURST_LENGTH_BL|OPM_NORMAL|CAS_3|BAT_SEQUENTIAL|BURST_LENGTH_4)
+
+
+#define TIMER1_BASE	(0x80000C00)
+
+/*
+ * special lookup flags
+ */
+#define DO_MEM_DELAY	1
+#define DO_MEM_READ	2
+
+_TEXT_BASE:
+	.word	TEXT_BASE
+
+.globl lowlevel_init
+lowlevel_init:
+	mov	r9, lr	@ save return address
+
+	/* memory control configuration */
+	/* make r0 relative the current location so that it */
+	/* reads INITMEM_DATA out of FLASH rather than memory ! */
+	/*   r0 = current word pointer */
+	/*   r1 = end word location, one word past last actual word */
+	/*   r3 = address for writes, special lookup flags */
+	/*   r4 = value for writes, delay constants, or read addresses */
+	/*   r2 = location for mem reads */
+
+	ldr	r0, =INITMEM_DATA
+	ldr	r1, _TEXT_BASE
+	sub	r0, r0, r1
+	add	r1, r0, #112
+
+mem_loop:
+	cmp	r1, r0
+	moveq	pc, r9		@ Done
+
+	ldr	r3, [r0], #4	@ Fetch Destination Register Address, or 1 for delay
+	ldr	r4, [r0], #4	@ value
+
+	cmp	r3, #DO_MEM_DELAY
+	bleq	mem_delay
+	beq	mem_loop
+	cmp	r3, #DO_MEM_READ
+	ldreq	r2, [r4]
+	beq	mem_loop
+	str	r4, [r3]	@ normal register/ram store
+	b	mem_loop
+
+mem_delay:
+	ldr	r5, =TIMER1_BASE
+	mov	r6, r4, LSR #1	@ timer resolution is ~2us
+	str	r6, [r5]
+	mov	r6, #0x88	@ using 508.469KHz clock, enable
+	str	r6, [r5, #8]
+0:	ldr	r6, [r5, #4]	@ timer value
+	cmp	r6, #0
+	bne	0b
+	mov	r6, #0		@ disable timer
+	str	r6, [r5, #8]
+	mov	pc, lr
+
+	.ltorg
+/* the literal pools origin */
+
+INITMEM_DATA:
+	.word	BCR0
+	.word	BCR0_FLASH
+	.word	BCR6
+	.word	BCR6_CPLD_SLOW
+	.word	BCR7
+	.word	BCR7_CPLD_FAST
+	.word	SDCSCX_BASE
+	.word	(SDCSCX_RAS2CAS_3 | SDCSCX_CASLAT_3 | SDCSCX_SROMLL | SDCSCX_4BNK | SDCSCX_EBW_32)
+	.word	GBLCNFG
+	.word	GC_CMD_NOP
+	.word	DO_MEM_DELAY
+	.word	200
+	.word	GBLCNFG
+	.word	GC_CMD_PRECHARGEALL
+	.word	RFSHTMR
+	.word	RFSHTMR_INIT
+	.word	DO_MEM_DELAY
+	.word	8
+	.word	RFSHTMR
+	.word	RFSHTMR_NORMAL
+	.word	GBLCNFG
+	.word	GC_CMD_MODE
+	.word	DO_MEM_READ
+	.word	(SDRAM_BASE | SDRAM_DEVICE_MODE)
+	.word	GBLCNFG
+	.word	GC_CMD_NORMAL
+	.word	SDCSCX_BASE
+	.word	(SDCSCX_AUTOPC | SDCSCX_RAS2CAS_3 | SDCSCX_CASLAT_3 | SDCSCX_SROMLL | SDCSCX_4BNK | SDCSCX_EBW_32)