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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.h50
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 */