Tegra2: implement Warmboot code and lp0_vec

arch/arm/cpu/arm_cortexa9/tegra2/warmboot_avp.S

Index: arch/arm/cpu/arm_cortexa9/tegra2/warmboot_avp.S
diff --git a/arch/arm/cpu/arm_cortexa9/tegra2/warmboot_avp.S b/arch/arm/cpu/arm_cortexa9/tegra2/warmboot_avp.S
new file mode 100755
index 0000000000000000000000000000000000000000..32723021e1b9e76f84c013fe411ccabb7d400aba
--- /dev/null
+++ b/arch/arm/cpu/arm_cortexa9/tegra2/warmboot_avp.S
@@ -0,0 +1,425 @@
+/*
+ * (C) Copyright 2010
+ * NVIDIA Corporation <www.nvidia.com>
+ *
+ * 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 "asm/arch/nvbl_arm_cpsr.h"
+#include "asm/arch/nvbl_memmap_nvap.h"
+#include "asm/arch/tegra2.h"
+#include "asm/arch/nv_drf_asm.h"
+
+/* -----------------------------------
+ * Compile-time code options
+ * -----------------------------------
+ */
+
+/* CPU Clock Source -- DO NOT CHOOSE PLL-X */
+#define CPU_CLOCK_SOURCE	CLK_RST_CONTROLLER_CCLK_BURST_POLICY_0_CWAKEUP_IDLE_SOURCE_PLLP_OUT0
+
+/* Scratch map */
+#define APBDEV_PMC_SCRATCH_FOR_LP_EXIT_TIME_0	APBDEV_PMC_SCRATCH1_0
+
+/*Misc warmboot parameters */
+#define AP20_WB0_RUN_ADDRESS	0x40020000
+
+/*Apertures bases */
+#define CSITE_PA_BASE		0x70040000	/* Base address for arcsite.h registers */
+#define CLK_RST_PA_BASE		0x60006000	/* Base address for arclk_rst.h registers */
+#define EVP_PA_BASE		0x6000F000	/* Base address for arevp.h registers */
+#define FLOW_PA_BASE		0x60007000	/* Base address for arflow_ctlr.h registers */
+#define PMC_PA_BASE		0x7000E400	/* Base address for arapbpm.h registers */
+#define TIMERUS_PA_BASE		0x60005010	/* Base address for artimerus.h registers */
+#define PG_UP_PA_BASE		0x60000000	/* Base address for arpg.h registers */
+#define MISC_PA_BASE		0x70000000	/* Base address for arapb_misc.h registers */
+
+/* -----------------------------------
+ * Compile-time debug code enables
+ * -----------------------------------
+ */
+
+#define DEBUG_DO_NOT_RESET_CORESIGHT	0	/* Set non-zero to skip resetting CoreSight */
+
+	.section	.text
+	.align		4
+
+/* ------------------------------------------------------
+ * Prototype:
+ *   void wb_start(void)
+ *
+ * Input:
+ *
+ * Output:
+ *   None
+ *
+ * Registers Used:
+ *   ALL
+ *
+ * Description:
+ *   This function restarts the CPU and then waits for the AVP driver to
+ *   tell it where to transfer control to finish restoration of the AVP state.
+ * -------------------------------------------------------------------------------
+ */
+
+	.globl	wb_start
+wb_start:
+
+	.word	0, 0, 0, 0
+	.word	0, 0, 0, 0
+	.word	0, 0, 0, 0
+	.word	0, 0, 0, 0
+
+start:
+
+	ldr	r0, =MISC_PA_BASE		/* R0 = MISC PA base address */
+	ldr	r1, =NV_DRF_DEF(APB_MISC_PP, CONFIG_CTL, JTAG, ENABLE) \
+		_OR_ NV_DRF_DEF(APB_MISC_PP, CONFIG_CTL, TBE, ENABLE)
+	str	r1, [r0, #NV_DRF_OFFSET(APB_MISC_PP, CONFIG_CTL)]
+
+	/* -----------------------------------------------------------------
+	 * Load up the base addresses for the register blocks.
+	 * -----------------------------------------------------------------
+	 */
+	ldr	r5, =PMC_PA_BASE		/* R5 = PMC PA base address */
+	ldr	r6, =FLOW_PA_BASE		/* R6 = FLOW PA base address */
+	ldr	r7, =TIMERUS_PA_BASE		/* R7 = TIMERUS PA base address */
+	ldr	r8, =CLK_RST_PA_BASE		/* R8 = CLK PA base address */
+	ldr	r9, =EVP_PA_BASE		/* R9 = EVP PA base address */
+	ldr	r10,=CSITE_PA_BASE		/* R10 = CSITE base address */
+
+	/* -----------------------------------------------------------------
+	 * Are we running where we're supposed to be?
+	 * -----------------------------------------------------------------
+	 */
+
+	ldr	r0, =AP20_WB0_RUN_ADDRESS	/* R0 = expected load address */
+	add	r1, pc, #here-(.+8)		/* R1 = &here */
+
+here:
+	sub	r1, r1, #(here-start)		/* R1 = actual load address */
+	ldr	r2, =PG_UP_PA_BASE		/* R2 = PG PA base address */
+	ldr	r3, [r2, #PG_UP_TAG_0]		/* R3 = processor tag */
+	ldr	r2, =PG_UP_TAG_0_PID_COP	/* R2 = AVP processor tag */
+	cmp	r0, r1				/* Addresses match? */
+	cmpeq	r2, r3				/* Processor tags match? */
+	bne	do_reset			/* No -- reset the chip */
+
+	/* -----------------------------------------------------------------
+	 * Get a snapshot of the Usec count. This is a good indicator of
+	 * the overhead of BOOTROM after a wake-up event.
+	 * -----------------------------------------------------------------
+	 */
+
+	ldr	r11, [r7, #TIMERUS_CNTR_1US_0]
+
+	/* ==================================================================
+	 * BEGIN CPU COMPLEX INITIALIZATON
+	 * ==================================================================
+	 */
+
+#if	!DEBUG_DO_NOT_RESET_CORESIGHT
+
+	/* ----------------------------------------------------------------
+	 * Assert CoreSight reset.
+	 * ----------------------------------------------------------------
+	 */
+
+	mov	r1, #NV_DRF_MASK(CLK_RST_CONTROLLER,RST_DEV_U_SET,SET_CSITE_RST)
+	str	r1, [r8, #CLK_RST_CONTROLLER_RST_DEV_U_SET_0]
+
+#endif /*!DEBUG_DO_NOT_RESET_CORESIGHT */
+
+	/* Set the drive strength */
+	ldr	r1, [r8, #CLK_RST_CONTROLLER_OSC_CTRL_0]
+	ldr	r3, =NV_DRF_MASK(CLK_RST_CONTROLLER, OSC_CTRL, XOFS) \
+		_OR_ NV_DRF_MASK(CLK_RST_CONTROLLER, OSC_CTRL, XOE)
+	bic 	r1, r1, r3
+	ldr	r3, =NV_DRF_NUM(CLK_RST_CONTROLLER, OSC_CTRL, XOFS, 0x4) \
+		_OR_ NV_DRF_NUM(CLK_RST_CONTROLLER, OSC_CTRL, XOE, 0x1)
+	orr 	r3, r1, r3
+	str	r3, [r8, #CLK_RST_CONTROLLER_OSC_CTRL_0]
+
+	/* -----------------------------------------------------------------
+	 * Power up the CPU complex if necessary.
+	 * -----------------------------------------------------------------
+	 */
+
+	ldr	r3, [r5, #APBDEV_PMC_PWRGATE_STATUS_0]
+	tst	r3, #NV_DRF_MASK(APBDEV_PMC, PWRGATE_STATUS, CPU)
+
+	ldreq	r2, =NV_DRF_DEF(APBDEV_PMC, PWRGATE_TOGGLE, PARTID, CP) \
+		_OR_ NV_DRF_DEF(APBDEV_PMC, PWRGATE_TOGGLE, START, ENABLE)
+	streq	r2, [r5, #APBDEV_PMC_PWRGATE_TOGGLE_0]
+
+is_cpu_on:
+	ldr	r3, [r5, #APBDEV_PMC_PWRGATE_STATUS_0]
+	tst	r3, #NV_DRF_MASK(APBDEV_PMC, PWRGATE_STATUS, CPU)
+	beq	is_cpu_on
+
+	/* -----------------------------------------------------------------
+	 * Remove the I/O clamps from the CPU power partition.
+	 * -----------------------------------------------------------------
+	 */
+
+	mov	r3, #NV_DRF_DEF(APBDEV_PMC, REMOVE_CLAMPING_CMD, CPU, ENABLE)
+	str	r3, [r5, #APBDEV_PMC_REMOVE_CLAMPING_CMD_0]
+
+	ldr	r3, =NV_DRF_NUM(FLOW_CTLR, HALT_COP_EVENTS, ZERO, 0x14) \
+		_OR_ NV_DRF_NUM(FLOW_CTLR, HALT_COP_EVENTS, MSEC, 1) \
+		_OR_ NV_DRF_NUM(FLOW_CTLR, HALT_COP_EVENTS, MODE, 2)
+	str	r3, [r6, #FLOW_CTLR_HALT_COP_EVENTS_0]
+
+	/* ------------------------------------------------------------------
+	 * Assert CPU complex reset.
+	 * ------------------------------------------------------------------
+	 */
+
+	mov	r1, #NV_DRF_MASK(CLK_RST_CONTROLLER,RST_DEV_L_SET,SET_CPU_RST)
+	str	r1, [r8, #CLK_RST_CONTROLLER_RST_DEV_L_SET_0]
+
+	/* ------------------------------------------------------------------
+	 * Hold both CPUs in reset.
+	 * ------------------------------------------------------------------
+	 */
+
+	ldr	r3, =NV_DRF_NUM(CLK_RST_CONTROLLER, RST_CPU_CMPLX_SET, SET_CPURESET1, 1) \
+		_OR_ NV_DRF_NUM(CLK_RST_CONTROLLER, RST_CPU_CMPLX_SET, SET_DBGRESET1, 1) \
+		_OR_ NV_DRF_NUM(CLK_RST_CONTROLLER, RST_CPU_CMPLX_SET, SET_DERESET1,  1) \
+		_OR_ NV_DRF_NUM(CLK_RST_CONTROLLER, RST_CPU_CMPLX_SET, SET_CPURESET0, 1) \
+		_OR_ NV_DRF_NUM(CLK_RST_CONTROLLER, RST_CPU_CMPLX_SET, SET_DBGRESET0, 1) \
+		_OR_ NV_DRF_NUM(CLK_RST_CONTROLLER, RST_CPU_CMPLX_SET, SET_DERESET0,  1)
+	str	r3, [r8, #CLK_RST_CONTROLLER_RST_CPU_CMPLX_SET_0]
+
+	/* ------------------------------------------------------------------
+	 * Halt CPU1 at the flow controller for uni-processor configurations.
+	 * ------------------------------------------------------------------
+	 */
+
+	mov	r3, #NV_DRF_DEF(FLOW_CTLR, HALT_CPU1_EVENTS, MODE, FLOW_MODE_STOP)
+	str	r3, [r6, #FLOW_CTLR_HALT_CPU1_EVENTS_0]
+
+	/* -----------------------------------------------------------------
+	 * Set the CPU reset vector. SCRATCH41 contains the physical
+	 * address of the CPU-side restoration code.
+	 * -----------------------------------------------------------------
+	 */
+
+	ldr	r3, [r5, #APBDEV_PMC_SCRATCH41_0]
+	str	r3, [r9, #EVP_CPU_RESET_VECTOR_0]
+
+	/* ------------------------------------------------------------------
+	 * Select CPU complex clock source.
+	 * ------------------------------------------------------------------
+	 */
+
+	ldr	r3, =(CPU_CLOCK_SOURCE _SHL_ NV_DRF_SHIFT(CLK_RST_CONTROLLER, CCLK_BURST_POLICY, CWAKEUP_FIQ_SOURCE))  \
+		_OR_ (CPU_CLOCK_SOURCE _SHL_ NV_DRF_SHIFT(CLK_RST_CONTROLLER, CCLK_BURST_POLICY, CWAKEUP_IRQ_SOURCE))  \
+		_OR_ (CPU_CLOCK_SOURCE _SHL_ NV_DRF_SHIFT(CLK_RST_CONTROLLER, CCLK_BURST_POLICY, CWAKEUP_RUN_SOURCE))  \
+		_OR_ (CPU_CLOCK_SOURCE _SHL_ NV_DRF_SHIFT(CLK_RST_CONTROLLER, CCLK_BURST_POLICY, CWAKEUP_IDLE_SOURCE)) \
+		_OR_ NV_DRF_DEF(CLK_RST_CONTROLLER, CCLK_BURST_POLICY, CPU_STATE, RUN)
+	str	r3, [r8, #CLK_RST_CONTROLLER_CCLK_BURST_POLICY_0]
+
+	/* ------------------------------------------------------------------
+	 * Start the CPU0 clock and stop the CPU1 clock.
+	 * ------------------------------------------------------------------
+	 */
+
+	ldr	r3, =NV_DRF_DEF(CLK_RST_CONTROLLER, CLK_CPU_CMPLX, CPU_BRIDGE_CLKDIV, DEFAULT) \
+		_OR_ NV_DRF_NUM(CLK_RST_CONTROLLER, CLK_CPU_CMPLX, CPU0_CLK_STP, 0) \
+		_OR_ NV_DRF_NUM(CLK_RST_CONTROLLER, CLK_CPU_CMPLX, CPU1_CLK_STP, 1)
+	str	r3, [r8, #CLK_RST_CONTROLLER_CLK_CPU_CMPLX_0]
+
+	/* ------------------------------------------------------------------
+	 * Enable the CPU complex clock.
+	 * ------------------------------------------------------------------
+	 */
+
+	mov	r3, #NV_DRF_MASK(CLK_RST_CONTROLLER,CLK_ENB_L_SET,SET_CLK_ENB_CPU)
+	str	r3, [r8, #CLK_RST_CONTROLLER_CLK_ENB_L_SET_0]
+
+	/* -----------------------------------------------------------------
+	 * Make sure the resets were held for at least 2 microseconds.
+	 * -----------------------------------------------------------------
+	 */
+
+	add	r3, r11, #2
+
+wait:
+	ldr	r2, [r7, #TIMERUS_CNTR_1US_0]
+	cmp	r2, r3
+	ble	wait
+
+#if	!DEBUG_DO_NOT_RESET_CORESIGHT
+
+	/* -----------------------------------------------------------------
+	 * De-assert CoreSight reset.
+	 * NOTE: We're leaving the CoreSight clock on the oscillator for
+	 *	now. It will be restored to its original clock source
+	 *	when the CPU-side restoration code runs.
+	 * -----------------------------------------------------------------
+	 */
+
+	mov	r1, #NV_DRF_MASK(CLK_RST_CONTROLLER,RST_DEV_U_CLR,CLR_CSITE_RST)
+	str	r1, [r8, #CLK_RST_CONTROLLER_RST_DEV_U_CLR_0]
+
+#endif /*!DEBUG_DO_NOT_RESET_CORESIGHT */
+
+	ldr	r1, =0xC5ACCE55			/* R0 = CoreSight unlock value */
+	ldr	r2, =CSITE_CPUDBG0_LAR_0	/* R1 = CPU0 lock offset */
+	ldr	r3, =CSITE_CPUDBG1_LAR_0	/* R2 = CPU1 lock offset */
+	str	r1, [r10, r2]			/* Unlock CPU0 */
+	str	r1, [r10, r3]			/* Unlock CPU1 */
+
+	/* -----------------------------------------------------------------
+	 * Sample the microsecond timestamp again. This is the time we must
+	 * use when returning from LP0 for PLL stabilization delays.
+	 * ----------------------------------------------------------------
+	 */
+
+	ldr	r11, [r7, #TIMERUS_CNTR_1US_0]
+	str	r11, [r5, #APBDEV_PMC_SCRATCH_FOR_LP_EXIT_TIME_0]
+
+	/* -----------------------------------------------------------------
+	 * Get the oscillator frequency. For 19.2 MHz, just use 19 to
+	 * make the calculations easier.
+	 * -----------------------------------------------------------------
+	 */
+
+	ldr	r4, [r7, #TIMERUS_USEC_CFG_0]
+	and	r4, r4, #NV_DRF_MASK(TIMERUS, USEC_CFG, USEC_DIVISOR)
+	add	r4, r4, #1
+	cmp	r4, #26
+	MOVGT	r4, #19
+
+	/* PLLX_BASE.PLLX_DIVM */
+	ldr	r0, [r5, #APBDEV_PMC_SCRATCH3_0]
+	and	r2, r0, #APBDEV_PMC_SCRATCH3_0_CLK_RST_PLLX_BASE_PLLX_DIVM_DEFAULT_MASK
+	cmp	r2, r4
+	moveq	r4, #0
+	movne	r4, #1
+
+	/* PLLX_BASE.PLLX_DIVN */
+	mov	r0, r0, ASR #(APBDEV_PMC_SCRATCH3_0_CLK_RST_PLLX_BASE_PLLX_DIVN_SHIFT - APBDEV_PMC_SCRATCH3_0_CLK_RST_PLLX_BASE_PLLX_DIVM_SHIFT)
+	ldr	r3, =APBDEV_PMC_SCRATCH3_0_CLK_RST_PLLX_BASE_PLLX_DIVN_DEFAULT_MASK
+	and	r1, r0, r3
+	orr	r2, r2, r1, LSL #CLK_RST_CONTROLLER_PLLX_BASE_0_PLLX_DIVN_SHIFT
+	mov	r4, r1, LSL r4
+
+	/* PLLX_BASE.PLLX_DIVP */
+	mov	r0, r0, ASR #(APBDEV_PMC_SCRATCH3_0_CLK_RST_PLLX_BASE_PLLX_DIVP_SHIFT - APBDEV_PMC_SCRATCH3_0_CLK_RST_PLLX_BASE_PLLX_DIVN_SHIFT)
+	and	r1, r0, #APBDEV_PMC_SCRATCH3_0_CLK_RST_PLLX_BASE_PLLX_DIVP_DEFAULT_MASK
+	orr	r2, r2, r1, LSL #CLK_RST_CONTROLLER_PLLX_BASE_0_PLLX_DIVP_SHIFT
+	mov	r4, r4, ASR r1
+
+	/* PLLX_BASE.PLLX_BYPASS_ENABLE | PLLX_BASE.PLLX_ENABLE_DISABLE | PLLX_BASE.PLLX_REF_DIS_REF_ENABLE */
+	orr	r2, r2, #NV_DRF_DEF(CLK_RST_CONTROLLER, PLLX_BASE, PLLX_BYPASS, ENABLE) \
+		_OR_ NV_DRF_DEF(CLK_RST_CONTROLLER, PLLX_BASE, PLLX_ENABLE, DISABLE) \
+		_OR_ NV_DRF_DEF(CLK_RST_CONTROLLER, PLLX_BASE, PLLX_REF_DIS, REF_ENABLE)
+
+	/* PLLX_MISC_DCCON must be set for frequencies > 600 MHz. */
+	cmp	r4, #600
+	movlt	r3, #0
+	movge	r3, #NV_DRF_DEF(CLK_RST_CONTROLLER,PLLX_MISC,PLLX_DCCON,DEFAULT)
+
+	/* PLLX_MISC_LFCON */
+	mov	r0, r0, ASR #(APBDEV_PMC_SCRATCH3_0_CLK_RST_PLLX_MISC_LFCON_SHIFT - APBDEV_PMC_SCRATCH3_0_CLK_RST_PLLX_BASE_PLLX_DIVP_SHIFT)
+	and	r1, r0, #APBDEV_PMC_SCRATCH3_0_CLK_RST_PLLX_MISC_LFCON_DEFAULT_MASK
+	orr	r3, r3, r1, LSL #CLK_RST_CONTROLLER_PLLX_MISC_0_PLLX_LFCON_SHIFT
+
+	/* PLLX_MISC_CPCON */
+	mov	r0, r0, ASR #(APBDEV_PMC_SCRATCH3_0_CLK_RST_PLLX_MISC_CPCON_SHIFT - APBDEV_PMC_SCRATCH3_0_CLK_RST_PLLX_MISC_LFCON_SHIFT)
+	and	r1, r0, #APBDEV_PMC_SCRATCH3_0_CLK_RST_PLLX_MISC_LFCON_DEFAULT_MASK
+	orr	r3, r3, r1, LSL #CLK_RST_CONTROLLER_PLLX_MISC_0_PLLX_CPCON_SHIFT
+
+	str	r3, [r8, #CLK_RST_CONTROLLER_PLLX_MISC_0]
+	str	r2, [r8, #CLK_RST_CONTROLLER_PLLX_BASE_0]
+	orr	r2, r2, #NV_DRF_DEF(CLK_RST_CONTROLLER, PLLX_BASE, PLLX_ENABLE, ENABLE)
+	str	r2, [r8, #CLK_RST_CONTROLLER_PLLX_BASE_0]
+	BIC	r2, r2, #NV_DRF_DEF(CLK_RST_CONTROLLER, PLLX_BASE, PLLX_BYPASS, ENABLE)
+	str	r2, [r8, #CLK_RST_CONTROLLER_PLLX_BASE_0]
+
+	mov	r3, #0
+	str	r3, [r6, #FLOW_CTLR_HALT_CPU_EVENTS_0]
+
+	ldr	r3, =NV_DRF_NUM(CLK_RST_CONTROLLER, RST_CPU_CMPLX_CLR, CLR_CPURESET0, 1) \
+		_OR_ NV_DRF_NUM(CLK_RST_CONTROLLER, RST_CPU_CMPLX_CLR, CLR_DBGRESET0, 1) \
+		_OR_ NV_DRF_NUM(CLK_RST_CONTROLLER, RST_CPU_CMPLX_CLR, CLR_DERESET0,  1)
+	str	r3, [r8, #CLK_RST_CONTROLLER_RST_CPU_CMPLX_CLR_0]
+
+	ldr	r1, = NV_DRF_DEF(CLK_RST_CONTROLLER, PLLM_OUT, PLLM_OUT1_RSTN, RESET_DISABLE) \
+		_OR_ NV_DRF_DEF(CLK_RST_CONTROLLER, PLLM_OUT, PLLM_OUT1_CLKEN, ENABLE) \
+		_OR_ NV_DRF_NUM(CLK_RST_CONTROLLER, PLLM_OUT, PLLM_OUT1_RATIO, 0x8)
+	str	r1, [r8, #CLK_RST_CONTROLLER_PLLM_OUT_0]
+
+	ldr	r2, =NV_DRF_DEF(CLK_RST_CONTROLLER, SCLK_BURST_POLICY, SWAKEUP_FIQ_SOURCE, PLLM_OUT1) \
+		_OR_ NV_DRF_DEF(CLK_RST_CONTROLLER, SCLK_BURST_POLICY, SWAKEUP_IRQ_SOURCE, PLLM_OUT1) \
+		_OR_ NV_DRF_DEF(CLK_RST_CONTROLLER, SCLK_BURST_POLICY, SWAKEUP_RUN_SOURCE, PLLM_OUT1) \
+		_OR_ NV_DRF_DEF(CLK_RST_CONTROLLER, SCLK_BURST_POLICY, SWAKEUP_IDLE_SOURCE, PLLM_OUT1) \
+		_OR_ NV_DRF_DEF(CLK_RST_CONTROLLER, SCLK_BURST_POLICY, SYS_STATE, IDLE)
+	str	r2, [r8, #CLK_RST_CONTROLLER_SCLK_BURST_POLICY_0]
+	b	avp_resume
+
+	.ltorg
+	.align	4
+
+avp_resume:
+
+	mov	r1, #NV_DRF_MASK(CLK_RST_CONTROLLER,RST_DEV_L_CLR,CLR_CPU_RST)
+	str	r1, [r8, #CLK_RST_CONTROLLER_RST_DEV_L_CLR_0]
+
+avp_halt:
+
+	mov	r3, #NV_DRF_DEF(FLOW_CTLR, HALT_COP_EVENTS, MODE, FLOW_MODE_STOP)
+	orr	r3, r3, #NV_DRF_NUM(FLOW_CTLR, HALT_COP_EVENTS, JTAG, 1)
+	str	r3, [r6, #FLOW_CTLR_HALT_COP_EVENTS_0]
+	b	avp_halt
+
+/* -------------------------------------------------------------------------------
+ * Prototype:
+ *   do_reset
+ *
+ * Input:
+ *   None
+ *
+ * Output:
+ *   None
+ *
+ * Registers Used:
+ *   All
+ *
+ * Description:
+ *   Execution comes here it something goes wrong. The chip is reset and a
+ *   cold boot is performed.
+ * -------------------------------------------------------------------------------
+ */
+
+do_reset:
+
+	mov	r0, #NV_DRF_DEF(CLK_RST_CONTROLLER, RST_DEVICES_L, SWR_TRIG_SYS_RST, ENABLE)
+	str	r0, [r8, #CLK_RST_CONTROLLER_RST_DEVICES_L_0]
+	b	.
+
+	.ltorg
+
+	.globl		wb_end
+wb_end:
+
+	.end
+