Add qemu 2.4.0

Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>

1 files changed, 189 insertions, 0 deletions

diff --git a/qemu/roms/u-boot/board/scb9328/lowlevel_init.S b/qemu/roms/u-boot/board/scb9328/lowlevel_init.S
new file mode 100644
index 000000000..2475ae8ef
--- /dev/null
+++ b/qemu/roms/u-boot/board/scb9328/lowlevel_init.S
@@ -0,0 +1,189 @@
+/*
+ * Copyright (C) 2004 Sascha Hauer, Synertronixx GmbH
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <config.h>
+#include <version.h>
+#include <asm/arch/imx-regs.h>
+
+.globl lowlevel_init
+lowlevel_init:
+
+	mov	r10, lr
+
+/* Change PERCLK1DIV to 14 ie 14+1 */
+	ldr		r0,	=PCDR
+	ldr		r1,	=CONFIG_SYS_PCDR_VAL
+	str		r1,   [r0]
+
+/* set MCU PLL Control Register 0 */
+
+	ldr		r0,	=MPCTL0
+	ldr		r1,	=CONFIG_SYS_MPCTL0_VAL
+	str		r1,   [r0]
+
+/* set mpll restart bit */
+	ldr		r0, =CSCR
+	ldr		r1, [r0]
+	orr		r1,r1,#(1<<21)
+	str		r1, [r0]
+
+	mov		r2,#0x10
+1:
+	mov		r3,#0x2000
+2:
+	subs	r3,r3,#1
+	bne		2b
+
+	subs	r2,r2,#1
+	bne		1b
+
+/* set System PLL Control Register 0 */
+
+	ldr		r0,	=SPCTL0
+	ldr		r1,	=CONFIG_SYS_SPCTL0_VAL
+	str		r1,   [r0]
+
+/* set spll restart bit */
+	ldr		r0, =CSCR
+	ldr		r1, [r0]
+	orr		r1,r1,#(1<<22)
+	str		r1, [r0]
+
+	mov		r2,#0x10
+1:
+	mov		r3,#0x2000
+2:
+	subs	r3,r3,#1
+	bne		2b
+
+	subs	r2,r2,#1
+	bne		1b
+
+	ldr		r0,   =CSCR
+	ldr		r1,   =CONFIG_SYS_CSCR_VAL
+	str		r1,   [r0]
+
+/* I have now read the ARM920 DataSheet back-to-Back, and have stumbled upon
+ *this.....
+ *
+ * It would appear that from a Cold-Boot the ARM920T enters "FastBus" mode CP15
+ * register 1, this stops it using the output of the PLL and thus runs at the
+ * slow rate. Unless you place the Core into "Asynch" mode, the CPU will never
+ * use the value set in the CM_OSC registers...regardless of what you set it
+ * too!  Thus, although i thought i was running at 140MHz, i'm actually running
+ * at 40!..
+
+ * Slapping this into my bootloader does the trick...
+
+ * MRC p15,0,r0,c1,c0,0    ; read core configuration register
+ * ORR r0,r0,#0xC0000000   ; set asynchronous clocks and not fastbus mode
+ * MCR p15,0,r0,c1,c0,0    ; write modified value to core configuration
+ * register
+ */
+	MRC p15,0,r0,c1,c0,0
+	ORR r0,r0,#0xC0000000
+	MCR p15,0,r0,c1,c0,0
+
+	ldr		r0,	=GPR(0)
+	ldr		r1,	=CONFIG_SYS_GPR_A_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=GIUS(0)
+	ldr		r1,	=CONFIG_SYS_GIUS_A_VAL
+	str		r1,   [r0]
+
+/* CS3 becomes CS3 by clearing reset default bit 1 in FMCR */
+
+	ldr		r0,	=FMCR
+	ldr		r1,	=CONFIG_SYS_FMCR_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=CS0U
+	ldr		r1,	=CONFIG_SYS_CS0U_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=CS0L
+	ldr		r1,	=CONFIG_SYS_CS0L_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=CS1U
+	ldr		r1,	=CONFIG_SYS_CS1U_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=CS1L
+	ldr		r1,	=CONFIG_SYS_CS1L_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=CS2U
+	ldr		r1,	=CONFIG_SYS_CS2U_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=CS2L
+	ldr		r1,	=CONFIG_SYS_CS2L_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=CS3U
+	ldr		r1,	=CONFIG_SYS_CS3U_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=CS3L
+	ldr		r1,	=CONFIG_SYS_CS3L_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=CS4U
+	ldr		r1,	=CONFIG_SYS_CS4U_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=CS4L
+	ldr		r1,	=CONFIG_SYS_CS4L_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=CS5U
+	ldr		r1,	=CONFIG_SYS_CS5U_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=CS5L
+	ldr		r1,	=CONFIG_SYS_CS5L_VAL
+	str		r1,   [r0]
+
+/* SDRAM Setup */
+
+	ldr		r0, =SDCTL0
+	ldr		r1, =PRECHARGE_CMD
+	str		r1,   [r0]
+
+	ldr		r0, =0x08200000
+	ldr		r1, =0x0 /* Issue Precharge all Command */
+	str		r1,   [r0]
+
+	ldr		r0, =SDCTL0
+	ldr		r1, =AUTOREFRESH_CMD
+	str		r1,   [r0]
+
+	ldr		r0, =0x08000000
+	ldr		r1, =0x0 /* Issue AutoRefresh Command */
+	str		r1,   [r0]
+	str		r1,   [r0]
+	str		r1,   [r0]
+	str		r1,   [r0]
+	str		r1,   [r0]
+	str		r1,   [r0]
+	str		r1,   [r0]
+	str		r1,   [r0]
+
+	ldr		r0, =SDCTL0
+	ldr		r1, =0xb10a8300
+	str		r1,   [r0]
+
+	ldr		r0, =0x08223000 /* CAS Latency 2 */
+	ldr		r1, =0x0   /* Issue Mode Register Command, Burst Length = 8 */
+	str		r1,   [r0]
+
+	ldr		r0, =SDCTL0
+	ldr		r1, =0x810a8200 /* Set to Normal Mode CAS 2 */
+	str		r1,   [r0]
+
+	mov	pc,r10