diff options
Diffstat (limited to 'arch/mips/include/asm/mach-paravirt/kernel-entry-init.h')
| -rw-r--r-- | arch/mips/include/asm/mach-paravirt/kernel-entry-init.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mach-paravirt/kernel-entry-init.h b/arch/mips/include/asm/mach-paravirt/kernel-entry-init.h new file mode 100644 index 00000000000..2f82bfa3a77 --- /dev/null +++ b/arch/mips/include/asm/mach-paravirt/kernel-entry-init.h @@ -0,0 +1,50 @@ +/* + * 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) 2013 Cavium, Inc + */ +#ifndef __ASM_MACH_PARAVIRT_KERNEL_ENTRY_H +#define __ASM_MACH_PARAVIRT_KERNEL_ENTRY_H + +#define CP0_EBASE $15, 1 + + .macro kernel_entry_setup + mfc0 t0, CP0_EBASE + andi t0, t0, 0x3ff # CPUNum + beqz t0, 1f + # CPUs other than zero goto smp_bootstrap + j smp_bootstrap + +1: + .endm + +/* + * Do SMP slave processor setup necessary before we can safely execute + * C code. + */ + .macro smp_slave_setup + mfc0 t0, CP0_EBASE + andi t0, t0, 0x3ff # CPUNum + slti t1, t0, NR_CPUS + bnez t1, 1f +2: + di + wait + b 2b # Unknown CPU, loop forever. +1: + PTR_LA t1, paravirt_smp_sp + PTR_SLL t0, PTR_SCALESHIFT + PTR_ADDU t1, t1, t0 +3: + PTR_L sp, 0(t1) + beqz sp, 3b # Spin until told to proceed. + + PTR_LA t1, paravirt_smp_gp + PTR_ADDU t1, t1, t0 + sync + PTR_L gp, 0(t1) + .endm + +#endif /* __ASM_MACH_PARAVIRT_KERNEL_ENTRY_H */ |