X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=arch%2Farm%2Fcpu%2Farmv8%2Fstart.S;h=5c500be51d1f5fb616e04539e5fd2cb9e7287e3b;hb=bd89fba2024305ae301fa7df80848b8d3e13efaf;hp=e933021a17ebe78de0a7a6150e248fe414d8bbdf;hpb=d38fca40c84e6d5f73dfe43cef4c46d42f90aa66;p=u-boot

diff --git a/arch/arm/cpu/armv8/start.S b/arch/arm/cpu/armv8/start.S
index e933021a17..5c500be51d 100644
--- a/arch/arm/cpu/armv8/start.S
+++ b/arch/arm/cpu/armv8/start.S
@@ -19,7 +19,16 @@
 
 .globl	_start
 _start:
+#ifdef CONFIG_ENABLE_ARM_SOC_BOOT0_HOOK
+/*
+ * Various SoCs need something special and SoC-specific up front in
+ * order to boot, allow them to set that in their boot0.h file and then
+ * use it here.
+ */
+#include <asm/arch/boot0.h>
+#else
 	b	reset
+#endif
 
 	.align 3
 
@@ -43,6 +52,11 @@ _bss_end_ofs:
 	.quad	__bss_end - _start
 
 reset:
+	/* Allow the board to save important registers */
+	b	save_boot_params
+.globl	save_boot_params_ret
+save_boot_params_ret:
+
 #ifdef CONFIG_SYS_RESET_SCTRL
 	bl reset_sctrl
 #endif
@@ -71,6 +85,20 @@ reset:
 	msr	cpacr_el1, x0			/* Enable FP/SIMD */
 0:
 
+	/*
+	 * Enable SMPEN bit for coherency.
+	 * This register is not architectural but at the moment
+	 * this bit should be set for A53/A57/A72.
+	 */
+#ifdef CONFIG_ARMV8_SET_SMPEN
+	switch_el x1, 3f, 1f, 1f
+3:
+	mrs     x0, S3_1_c15_c2_1               /* cpuectlr_el1 */
+	orr     x0, x0, #0x40
+	msr     S3_1_c15_c2_1, x0
+1:
+#endif
+
 	/* Apply ARM core specific erratas */
 	bl	apply_core_errata
 
@@ -84,7 +112,11 @@ reset:
 	/* Processor specific initialization */
 	bl	lowlevel_init
 
-#ifdef CONFIG_ARMV8_MULTIENTRY
+#if defined(CONFIG_ARMV8_SPIN_TABLE) && !defined(CONFIG_SPL_BUILD)
+	branch_if_master x0, x1, master_cpu
+	b	spin_table_secondary_jump
+	/* never return */
+#elif defined(CONFIG_ARMV8_MULTIENTRY)
 	branch_if_master x0, x1, master_cpu
 
 	/*
@@ -96,10 +128,8 @@ slave_cpu:
 	ldr	x0, [x1]
 	cbz	x0, slave_cpu
 	br	x0			/* branch to the given address */
-master_cpu:
-	/* On the master CPU */
 #endif /* CONFIG_ARMV8_MULTIENTRY */
-
+master_cpu:
 	bl	_main
 
 #ifdef CONFIG_SYS_RESET_SCTRL
@@ -234,9 +264,17 @@ WEAK(lowlevel_init)
 	/*
 	 * All slaves will enter EL2 and optionally EL1.
 	 */
+	adr	x4, lowlevel_in_el2
+	ldr	x5, =ES_TO_AARCH64
 	bl	armv8_switch_to_el2
+
+lowlevel_in_el2:
 #ifdef CONFIG_ARMV8_SWITCH_TO_EL1
+	adr	x4, lowlevel_in_el1
+	ldr	x5, =ES_TO_AARCH64
 	bl	armv8_switch_to_el1
+
+lowlevel_in_el1:
 #endif
 
 #endif /* CONFIG_ARMV8_MULTIENTRY */
@@ -248,12 +286,10 @@ ENDPROC(lowlevel_init)
 
 WEAK(smp_kick_all_cpus)
 	/* Kick secondary cpus up by SGI 0 interrupt */
-	mov	x29, lr			/* Save LR */
 #if defined(CONFIG_GICV2) || defined(CONFIG_GICV3)
 	ldr	x0, =GICD_BASE
-	bl	gic_kick_secondary_cpus
+	b	gic_kick_secondary_cpus
 #endif
-	mov	lr, x29			/* Restore LR */
 	ret
 ENDPROC(smp_kick_all_cpus)
 
@@ -272,3 +308,7 @@ ENTRY(c_runtime_cpu_setup)
 
 	ret
 ENDPROC(c_runtime_cpu_setup)
+
+WEAK(save_boot_params)
+	b	save_boot_params_ret	/* back to my caller */
+ENDPROC(save_boot_params)