summaryrefslogtreecommitdiffstats
path: root/arch/mips/include/asm/mach-loongson64/kernel-entry-init.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/mips/include/asm/mach-loongson64/kernel-entry-init.h')
-rw-r--r--arch/mips/include/asm/mach-loongson64/kernel-entry-init.h105
1 files changed, 105 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mach-loongson64/kernel-entry-init.h b/arch/mips/include/asm/mach-loongson64/kernel-entry-init.h
new file mode 100644
index 0000000000..efb41b3519
--- /dev/null
+++ b/arch/mips/include/asm/mach-loongson64/kernel-entry-init.h
@@ -0,0 +1,105 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2005 Embedded Alley Solutions, Inc
+ * Copyright (C) 2005 Ralf Baechle (ralf@linux-mips.org)
+ * Copyright (C) 2009 Jiajie Chen (chenjiajie@cse.buaa.edu.cn)
+ * Copyright (C) 2012 Huacai Chen (chenhc@lemote.com)
+ */
+#ifndef __ASM_MACH_LOONGSON64_KERNEL_ENTRY_H
+#define __ASM_MACH_LOONGSON64_KERNEL_ENTRY_H
+
+#include <asm/cpu.h>
+
+/*
+ * Override macros used in arch/mips/kernel/head.S.
+ */
+ .macro kernel_entry_setup
+ .set push
+ .set mips64
+ /* Set ELPA on LOONGSON3 pagegrain */
+ mfc0 t0, CP0_PAGEGRAIN
+ or t0, (0x1 << 29)
+ mtc0 t0, CP0_PAGEGRAIN
+ /* Enable STFill Buffer */
+ mfc0 t0, CP0_PRID
+ /* Loongson-3A R4+ */
+ andi t1, t0, PRID_IMP_MASK
+ li t2, PRID_IMP_LOONGSON_64G
+ beq t1, t2, 1f
+ nop
+ /* Loongson-3A R2/R3 */
+ andi t0, (PRID_IMP_MASK | PRID_REV_MASK)
+ slti t0, t0, (PRID_IMP_LOONGSON_64C | PRID_REV_LOONGSON3A_R2_0)
+ bnez t0, 2f
+ nop
+1:
+ mfc0 t0, CP0_CONFIG6
+ or t0, 0x100
+ mtc0 t0, CP0_CONFIG6
+2:
+ _ehb
+ .set pop
+ .endm
+
+/*
+ * Do SMP slave processor setup.
+ */
+ .macro smp_slave_setup
+ .set push
+ .set mips64
+ /* Set ELPA on LOONGSON3 pagegrain */
+ mfc0 t0, CP0_PAGEGRAIN
+ or t0, (0x1 << 29)
+ mtc0 t0, CP0_PAGEGRAIN
+ /* Enable STFill Buffer */
+ mfc0 t0, CP0_PRID
+ /* Loongson-3A R4+ */
+ andi t1, t0, PRID_IMP_MASK
+ li t2, PRID_IMP_LOONGSON_64G
+ beq t1, t2, 1f
+ nop
+ /* Loongson-3A R2/R3 */
+ andi t0, (PRID_IMP_MASK | PRID_REV_MASK)
+ slti t0, t0, (PRID_IMP_LOONGSON_64C | PRID_REV_LOONGSON3A_R2_0)
+ bnez t0, 2f
+ nop
+1:
+ mfc0 t0, CP0_CONFIG6
+ or t0, 0x100
+ mtc0 t0, CP0_CONFIG6
+2:
+ _ehb
+ .set pop
+ .endm
+
+#define USE_KEXEC_SMP_WAIT_FINAL
+ .macro kexec_smp_wait_final
+ /* s0:prid s1:initfn */
+ /* a0:base t1:cpuid t2:node t9:count */
+ mfc0 t1, CP0_EBASE
+ andi t1, MIPS_EBASE_CPUNUM
+ dins a0, t1, 8, 2 /* insert core id*/
+ dext t2, t1, 2, 2
+ dins a0, t2, 44, 2 /* insert node id */
+ mfc0 s0, CP0_PRID
+ andi s0, s0, (PRID_IMP_MASK | PRID_REV_MASK)
+ beq s0, (PRID_IMP_LOONGSON_64C | PRID_REV_LOONGSON3B_R1), 1f
+ beq s0, (PRID_IMP_LOONGSON_64C | PRID_REV_LOONGSON3B_R2), 1f
+ b 2f /* Loongson-3A1000/3A2000/3A3000/3A4000 */
+1: dins a0, t2, 14, 2 /* Loongson-3B1000/3B1500 need bit 15~14 */
+2: li t9, 0x100 /* wait for init loop */
+3: addiu t9, -1 /* limit mailbox access */
+ bnez t9, 3b
+ lw s1, 0x20(a0) /* check PC as an indicator */
+ beqz s1, 2b
+ ld s1, 0x20(a0) /* get PC via mailbox reg0 */
+ ld sp, 0x28(a0) /* get SP via mailbox reg1 */
+ ld gp, 0x30(a0) /* get GP via mailbox reg2 */
+ ld a1, 0x38(a0)
+ jr s1 /* jump to initial PC */
+ .endm
+
+#endif /* __ASM_MACH_LOONGSON64_KERNEL_ENTRY_H */