Initial revision

1 files changed, 182 insertions, 0 deletions

diff --git a/board/evb64260/misc.S b/board/evb64260/misc.S
new file mode 100644
index 0000000..4bbf6ef
--- /dev/null
+++ b/board/evb64260/misc.S
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+#include <config.h>
+#include <74xx_7xx.h>
+#include <version.h>
+
+#include <ppc_asm.tmpl>
+#include <ppc_defs.h>
+
+#include <asm/cache.h>
+#include <asm/mmu.h>
+
+#include <galileo/gt64260R.h>
+
+#ifdef CONFIG_ECC
+	/* Galileo specific asm code for initializing ECC */
+	.globl board_relocate_rom
+board_relocate_rom:
+	mflr	r7
+	/* update the location of the GT registers */
+	lis	r11, CFG_GT_REGS@h
+	/* if we're using ECC, we must use the DMA engine to copy ourselves */
+	bl	start_idma_transfer_0
+	bl	wait_for_idma_0
+	bl	stop_idma_engine_0
+
+	mtlr	r7
+	blr
+
+	.globl board_init_ecc
+board_init_ecc:
+	mflr	r7
+	/* NOTE: r10 still contains the location we've been relocated to
+	 * which happens to be TOP_OF_RAM - CFG_MONITOR_LEN */
+
+	/* now that we're running from ram, init the rest of main memory
+	 * for ECC use */
+	lis	r8, CFG_MONITOR_LEN@h
+	ori	r8, r8, CFG_MONITOR_LEN@l
+
+	divw	r3, r10, r8
+
+	/* set up the counter, and init the starting address */
+	mtctr	r3
+	li	r12, 0
+
+	/* bytes per transfer */
+	mr	r5, r8
+about_to_init_ecc:
+1:	mr	r3, r12
+	mr	r4, r12
+	bl	start_idma_transfer_0
+	bl	wait_for_idma_0
+	bl	stop_idma_engine_0
+	add	r12, r12, r8
+	bdnz	1b
+
+	mtlr	r7
+	blr
+
+	/* r3:	dest addr
+	 * r4:	source addr
+	 * r5:	byte count
+	 * r11:	gt regbase
+	 * trashes:	 r6, r5
+	 */
+start_idma_transfer_0:
+	/* set the byte count, including the OWN bit */
+	mr	r6, r11
+	ori	r6, r6, CHANNEL0_DMA_BYTE_COUNT
+	stwbrx	r5, 0, (r6)
+
+	/* set the source address */
+	mr	r6, r11
+	ori	r6, r6, CHANNEL0_DMA_SOURCE_ADDRESS
+	stwbrx	r4, 0, (r6)
+
+	/* set the dest address */
+	mr	r6, r11
+	ori	r6, r6, CHANNEL0_DMA_DESTINATION_ADDRESS
+	stwbrx	r3, 0, (r6)
+
+	/* set the next record pointer */
+	li	r5, 0
+	mr	r6, r11
+	ori	r6, r6, CHANNEL0NEXT_RECORD_POINTER
+	stwbrx	r5, 0, (r6)
+
+	/* set the low control register */
+	/* bit 9 is NON chained mode, bit 31 is new style descriptors.
+	   bit 12 is channel enable */
+	ori	r5, r5, (1 << 12) | (1 << 12) | (1 << 11)
+	/* 15 shifted by 16 (oris) == bit 31 */
+	oris	r5, r5, (1 << 15)
+	mr	r6, r11
+	ori	r6, r6, CHANNEL0CONTROL
+	stwbrx	r5, 0, (r6)
+
+	blr
+
+	/* this waits for the bytecount to return to zero, indicating
+	 * that the trasfer is complete */
+wait_for_idma_0:
+	mr	r5, r11
+	lis	r6, 0xff
+	ori	r6, r6, 0xffff
+	ori	r5, r5, CHANNEL0_DMA_BYTE_COUNT
+1:	lwbrx	r4, 0, (r5)
+	and.	r4, r4, r6
+	bne	1b
+
+	blr
+
+	/* this turns off channel 0 of the idma engine */
+stop_idma_engine_0:
+	/* shut off the DMA engine */
+	li	r5, 0
+	mr	r6, r11
+	ori	r6, r6, CHANNEL0CONTROL
+	stwbrx	r5, 0, (r6)
+
+	blr
+#endif
+
+#ifdef CFG_BOARD_ASM_INIT
+	/* NOTE: trashes r3-r7 */
+	.globl board_asm_init
+board_asm_init:
+	/* just move the GT registers to where they belong */
+	lis	r3, CFG_DFL_GT_REGS@h
+	ori	r3, r3, CFG_DFL_GT_REGS@l
+	lis	r4, CFG_GT_REGS@h
+	ori	r4, r4, CFG_GT_REGS@l
+	li	r5, INTERNAL_SPACE_DECODE
+
+	/* test to see if we've already moved */
+	lwbrx	r6, r5, r4
+	andi.	r6, r6, 0xffff
+	rlwinm	r7, r4, 12, 16, 31
+	cmp	cr0, r7, r6
+	beqlr
+
+	/* nope, have to move the registers */
+	lwbrx	r6, r5, r3
+	andis.	r6, r6, 0xffff
+	or	r6, r6, r7
+	stwbrx	r6, r5, r3
+
+	/* now, poll for the change */
+1:	lwbrx	r7, r5, r4
+	cmp	cr0, r7, r6
+	bne	1b
+
+	/* done! */
+	blr
+#endif
+
+/* For use of the debug LEDs */
+        .global led_on0
+led_on0:
+        xor     r18, r18, r18
+        lis     r18, 0x1c80
+        ori     r18, r18, 0x8000
+        stw     r18, 0x0(r18)
+        sync
+        blr
+
+        .global led_on1
+led_on1:
+        xor     r18, r18, r18
+        lis     r18, 0x1c80
+        ori     r18, r18, 0xc000
+        stw     r18, 0x0(r18)
+        sync
+        blr
+
+        .global led_on2
+led_on2:
+        xor     r18, r18, r18
+        lis     r18, 0x1c81
+        ori     r18, r18, 0x0000
+        stw     r18, 0x0(r18)
+        sync
+        blr