| David Daney | 18280eda | 2014-05-28 23:52:13 +0200 | [diff] [blame] | 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 |
| Matt Redfearn | 951c39c | 2016-09-05 15:43:40 +0100 | [diff] [blame] | 14 | #ifdef CONFIG_SMP |
| David Daney | 18280eda | 2014-05-28 23:52:13 +0200 | [diff] [blame] | 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 |
| Matt Redfearn | 951c39c | 2016-09-05 15:43:40 +0100 | [diff] [blame] | 20 | #endif /* CONFIG_SMP */ |
| David Daney | 18280eda | 2014-05-28 23:52:13 +0200 | [diff] [blame] | 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 */ |