diff options
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.h | 105 |
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 */ |