arm: Move cpu/$CPU to arch/arm/cpu/$CPU

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>

1 files changed, 272 insertions, 0 deletions

diff --git a/arch/arm/cpu/s3c44b0/start.S b/arch/arm/cpu/s3c44b0/start.S
new file mode 100644
index 0000000..f5a3d3a
--- /dev/null
+++ b/arch/arm/cpu/s3c44b0/start.S
@@ -0,0 +1,272 @@
+/*
+ * Startup Code for S3C44B0 CPU-core
+ *
+ * (C) Copyright 2004
+ * DAVE Srl
+ *
+ * http://www.dave-tech.it
+ * http://www.wawnet.biz
+ * mailto:info@wawnet.biz
+ *
+ * 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>
+
+
+/*
+ * Jump vector table
+ */
+
+
+.globl _start
+_start:	b       reset
+	add	pc, pc, #0x0c000000
+	add	pc, pc, #0x0c000000
+	add	pc, pc, #0x0c000000
+	add	pc, pc, #0x0c000000
+	add	pc, pc, #0x0c000000
+	add	pc, pc, #0x0c000000
+	add	pc, pc, #0x0c000000
+
+	.balignl 16,0xdeadbeef
+
+
+/*
+ *************************************************************************
+ *
+ * Startup Code (reset vector)
+ *
+ * do important init only if we don't start from memory!
+ * relocate u-boot to ram
+ * setup stack
+ * jump to second stage
+ *
+ *************************************************************************
+ */
+
+_TEXT_BASE:
+	.word	TEXT_BASE
+
+.globl _armboot_start
+_armboot_start:
+	.word _start
+
+/*
+ * These are defined in the board-specific linker script.
+ */
+.globl _bss_start
+_bss_start:
+	.word __bss_start
+
+.globl _bss_end
+_bss_end:
+	.word _end
+
+#ifdef CONFIG_USE_IRQ
+/* IRQ stack memory (calculated at run-time) */
+.globl IRQ_STACK_START
+IRQ_STACK_START:
+	.word	0x0badc0de
+
+/* IRQ stack memory (calculated at run-time) */
+.globl FIQ_STACK_START
+FIQ_STACK_START:
+	.word 0x0badc0de
+#endif
+
+
+/*
+ * the actual reset code
+ */
+
+reset:
+	/*
+	 * set the cpu to SVC32 mode
+	 */
+	mrs	r0,cpsr
+	bic	r0,r0,#0x1f
+	orr	r0,r0,#0x13
+	msr	cpsr,r0
+
+	/*
+	 * we do sys-critical inits only at reboot,
+	 * not when booting from ram!
+	 */
+
+#ifndef CONFIG_SKIP_LOWLEVEL_INIT
+	bl	cpu_init_crit
+	/*
+	 * before relocating, we have to setup RAM timing
+	 * because memory timing is board-dependend, you will
+	 * find a lowlevel_init.S in your board directory.
+	 */
+	bl	lowlevel_init
+#endif
+
+#ifndef CONFIG_SKIP_RELOCATE_UBOOT
+relocate:				/* relocate U-Boot to RAM	    */
+	adr	r0, _start		/* r0 <- current position of code   */
+	ldr	r1, _TEXT_BASE		/* test if we run from flash or RAM */
+	cmp     r0, r1                  /* don't reloc during debug         */
+	beq     stack_setup
+
+	ldr	r2, _armboot_start
+	ldr	r3, _bss_start
+	sub	r2, r3, r2		/* r2 <- size of armboot            */
+	add	r2, r0, r2		/* r2 <- source end address         */
+
+copy_loop:
+	ldmia	r0!, {r3-r10}		/* copy from source address [r0]    */
+	stmia	r1!, {r3-r10}		/* copy to   target address [r1]    */
+	cmp	r0, r2			/* until source end addreee [r2]    */
+	ble	copy_loop
+
+/*
+	now copy to sram the interrupt vector
+*/
+	adr	r0, real_vectors
+	add	r2, r0, #1024
+	ldr	r1, =0x0c000000
+	add	r1, r1, #0x08
+vector_copy_loop:
+	ldmia	r0!, {r3-r10}
+	stmia	r1!, {r3-r10}
+	cmp	r0, r2
+	ble	vector_copy_loop
+#endif	/* CONFIG_SKIP_RELOCATE_UBOOT */
+
+	/* Set up the stack						    */
+stack_setup:
+	ldr	r0, _TEXT_BASE		/* upper 128 KiB: relocated uboot   */
+	sub	r0, r0, #CONFIG_SYS_MALLOC_LEN	/* malloc area                      */
+	sub	r0, r0, #CONFIG_SYS_GBL_DATA_SIZE /* bdinfo                        */
+#ifdef CONFIG_USE_IRQ
+	sub	r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
+#endif
+	sub	sp, r0, #12		/* leave 3 words for abort-stack    */
+
+	ldr	pc, _start_armboot
+
+_start_armboot:	.word start_armboot
+
+
+/*
+ *************************************************************************
+ *
+ * CPU_init_critical registers
+ *
+ * setup important registers
+ * setup memory timing
+ *
+ *************************************************************************
+ */
+
+#define INTCON (0x01c00000+0x200000)
+#define INTMSK (0x01c00000+0x20000c)
+#define LOCKTIME (0x01c00000+0x18000c)
+#define PLLCON (0x01c00000+0x180000)
+#define CLKCON (0x01c00000+0x180004)
+#define WTCON (0x01c00000+0x130000)
+cpu_init_crit:
+	/* disable watch dog */
+	ldr	r0, =WTCON
+	ldr	r1, =0x0
+	str	r1, [r0]
+
+	/*
+	 * mask all IRQs by clearing all bits in the INTMRs
+	 */
+	ldr	r1,=INTMSK
+	ldr	r0, =0x03fffeff
+	str	r0, [r1]
+
+	ldr	r1, =INTCON
+	ldr	r0, =0x05
+	str	r0, [r1]
+
+	/* Set Clock Control Register */
+	ldr	r1, =LOCKTIME
+	ldrb	r0, =800
+	strb	r0, [r1]
+
+	ldr	r1, =PLLCON
+
+#if CONFIG_S3C44B0_CLOCK_SPEED==66
+	ldr	r0, =0x34031	/* 66MHz (Quartz=11MHz) */
+#elif CONFIG_S3C44B0_CLOCK_SPEED==75
+	ldr	r0, =0x610c1 /*B2: Xtal=20mhz Fclk=75MHz  */
+#else
+# error CONFIG_S3C44B0_CLOCK_SPEED undefined
+#endif
+
+	str	r0, [r1]
+
+	ldr	r1,=CLKCON
+	ldr	r0, =0x7ff8
+	str	r0, [r1]
+
+	mov	pc, lr
+
+
+/*************************************************/
+/*	interrupt vectors	*/
+/*************************************************/
+real_vectors:
+	b	reset
+	b	undefined_instruction
+	b	software_interrupt
+	b	prefetch_abort
+	b	data_abort
+	b	not_used
+	b	irq
+	b	fiq
+
+/*************************************************/
+
+undefined_instruction:
+	mov	r6, #3
+	b	reset
+
+software_interrupt:
+	mov	r6, #4
+	b	reset
+
+prefetch_abort:
+	mov	r6, #5
+	b	reset
+
+data_abort:
+	mov	r6, #6
+	b	reset
+
+not_used:
+	/* we *should* never reach this */
+	mov	r6, #7
+	b	reset
+
+irq:
+	mov	r6, #8
+	b	reset
+
+fiq:
+	mov	r6, #9
+	b	reset