projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 18280eda DD |
1 | /* |
| 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 | |
| 4 | * for more details. | |
| 5 | * | |
| 6 | * Copyright (C) 2013 Cavium, Inc | |
| 7 | */ | |
| 8 | #ifndef __ASM_MACH_PARAVIRT_KERNEL_ENTRY_H | |
| 9 | #define __ASM_MACH_PARAVIRT_KERNEL_ENTRY_H | |
| 10 | ||
| 11 | #define CP0_EBASE $15, 1 | |
| 12 | ||
| 13 | .macro kernel_entry_setup | |
| 951c39cd | 14 | #ifdef CONFIG_SMP |
| 18280eda DD |
15 | mfc0 t0, CP0_EBASE |
| 16 | andi t0, t0, 0x3ff # CPUNum | |
| 17 | beqz t0, 1f | |
| 18 | # CPUs other than zero goto smp_bootstrap | |
| 19 | j smp_bootstrap | |
| 951c39cd | 20 | #endif /* CONFIG_SMP */ |
| 18280eda DD |
21 | |
| 22 | 1: | |
| 23 | .endm | |
| 24 | ||
| 25 | /* | |
| 26 | * Do SMP slave processor setup necessary before we can safely execute | |
| 27 | * C code. | |
| 28 | */ | |
| 29 | .macro smp_slave_setup | |
| 30 | mfc0 t0, CP0_EBASE | |
| 31 | andi t0, t0, 0x3ff # CPUNum | |
| 32 | slti t1, t0, NR_CPUS | |
| 33 | bnez t1, 1f | |
| 34 | 2: | |
| 35 | di | |
| 36 | wait | |
| 37 | b 2b # Unknown CPU, loop forever. | |
| 38 | 1: | |
| 39 | PTR_LA t1, paravirt_smp_sp | |
| 40 | PTR_SLL t0, PTR_SCALESHIFT | |
| 41 | PTR_ADDU t1, t1, t0 | |
| 42 | 3: | |
| 43 | PTR_L sp, 0(t1) | |
| 44 | beqz sp, 3b # Spin until told to proceed. | |
| 45 | ||
| 46 | PTR_LA t1, paravirt_smp_gp | |
| 47 | PTR_ADDU t1, t1, t0 | |
| 48 | sync | |
| 49 | PTR_L gp, 0(t1) | |
| 50 | .endm | |
| 51 | ||
| 52 | #endif /* __ASM_MACH_PARAVIRT_KERNEL_ENTRY_H */ |