2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 2005 Embedded Alley Solutions, Inc
7 * Copyright (C) 2005 Ralf Baechle (ralf@linux-mips.org)
8 * Copyright (C) 2009 Jiajie Chen (chenjiajie@cse.buaa.edu.cn)
9 * Copyright (C) 2012 Huacai Chen (chenhc@lemote.com)
11 #ifndef __ASM_MACH_LOONGSON64_KERNEL_ENTRY_H
12 #define __ASM_MACH_LOONGSON64_KERNEL_ENTRY_H
17 * Override macros used in arch/mips/kernel/head.S.
19 .macro kernel_entry_setup
22 /* Set ELPA on LOONGSON3 pagegrain */
23 mfc0 t0, CP0_PAGEGRAIN
25 mtc0 t0, CP0_PAGEGRAIN
26 /* Enable STFill Buffer */
29 andi t1, t0, PRID_IMP_MASK
30 li t2, PRID_IMP_LOONGSON_64G
33 /* Loongson-3A R2/R3 */
34 andi t0, (PRID_IMP_MASK | PRID_REV_MASK)
35 slti t0, t0, (PRID_IMP_LOONGSON_64C | PRID_REV_LOONGSON3A_R2_0)
48 * Do SMP slave processor setup.
50 .macro smp_slave_setup
53 /* Set ELPA on LOONGSON3 pagegrain */
54 mfc0 t0, CP0_PAGEGRAIN
56 mtc0 t0, CP0_PAGEGRAIN
57 /* Enable STFill Buffer */
60 andi t1, t0, PRID_IMP_MASK
61 li t2, PRID_IMP_LOONGSON_64G
64 /* Loongson-3A R2/R3 */
65 andi t0, (PRID_IMP_MASK | PRID_REV_MASK)
66 slti t0, t0, (PRID_IMP_LOONGSON_64C | PRID_REV_LOONGSON3A_R2_0)
78 #define USE_KEXEC_SMP_WAIT_FINAL
79 .macro kexec_smp_wait_final
80 /* s0:prid s1:initfn */
81 /* a0:base t1:cpuid t2:node t9:count */
83 andi t1, MIPS_EBASE_CPUNUM
84 dins a0, t1, 8, 2 /* insert core id*/
86 dins a0, t2, 44, 2 /* insert node id */
88 andi s0, s0, (PRID_IMP_MASK | PRID_REV_MASK)
89 beq s0, (PRID_IMP_LOONGSON_64C | PRID_REV_LOONGSON3B_R1), 1f
90 beq s0, (PRID_IMP_LOONGSON_64C | PRID_REV_LOONGSON3B_R2), 1f
91 b 2f /* Loongson-3A1000/3A2000/3A3000/3A4000 */
92 1: dins a0, t2, 14, 2 /* Loongson-3B1000/3B1500 need bit 15~14 */
93 2: li t9, 0x100 /* wait for init loop */
94 3: addiu t9, -1 /* limit mailbox access */
96 lw s1, 0x20(a0) /* check PC as an indicator */
98 ld s1, 0x20(a0) /* get PC via mailbox reg0 */
99 ld sp, 0x28(a0) /* get SP via mailbox reg1 */
100 ld gp, 0x30(a0) /* get GP via mailbox reg2 */
102 jr s1 /* jump to initial PC */
105 #endif /* __ASM_MACH_LOONGSON64_KERNEL_ENTRY_H */