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-rw-r--r--arch/mips/kernel/head.S70
1 files changed, 23 insertions, 47 deletions
diff --git a/arch/mips/kernel/head.S b/arch/mips/kernel/head.S
index 2a1b45d66f04..2e9122a4213a 100644
--- a/arch/mips/kernel/head.S
+++ b/arch/mips/kernel/head.S
@@ -22,11 +22,8 @@
#include <asm/page.h>
#include <asm/mipsregs.h>
#include <asm/stackframe.h>
-#ifdef CONFIG_SGI_IP27
-#include <asm/sn/addrs.h>
-#include <asm/sn/sn0/hubni.h>
-#include <asm/sn/klkernvars.h>
-#endif
+
+#include <kernel-entry-init.h>
.macro ARC64_TWIDDLE_PC
#if defined(CONFIG_ARC64) || defined(CONFIG_MAPPED_KERNEL)
@@ -38,18 +35,6 @@
#endif
.endm
-#ifdef CONFIG_SGI_IP27
- /*
- * outputs the local nasid into res. IP27 stuff.
- */
- .macro GET_NASID_ASM res
- dli \res, LOCAL_HUB_ADDR(NI_STATUS_REV_ID)
- ld \res, (\res)
- and \res, NSRI_NODEID_MASK
- dsrl \res, NSRI_NODEID_SHFT
- .endm
-#endif /* CONFIG_SGI_IP27 */
-
/*
* inputs are the text nasid in t1, data nasid in t2.
*/
@@ -131,16 +116,21 @@
EXPORT(stext) # used for profiling
EXPORT(_stext)
+#if defined(CONFIG_QEMU) || defined(CONFIG_MIPS_SIM)
+ /*
+ * Give us a fighting chance of running if execution beings at the
+ * kernel load address. This is needed because this platform does
+ * not have a ELF loader yet.
+ */
+ j kernel_entry
+#endif
__INIT
NESTED(kernel_entry, 16, sp) # kernel entry point
- setup_c0_status_pri
-#ifdef CONFIG_SGI_IP27
- GET_NASID_ASM t1
- move t2, t1 # text and data are here
- MAPPED_KERNEL_SETUP_TLB
-#endif /* IP27 */
+ kernel_entry_setup # cpu specific setup
+
+ setup_c0_status_pri
ARC64_TWIDDLE_PC
@@ -157,6 +147,7 @@ NESTED(kernel_entry, 16, sp) # kernel entry point
LONG_S a2, fw_arg2
LONG_S a3, fw_arg3
+ MTC0 zero, CP0_CONTEXT # clear context register
PTR_LA $28, init_thread_union
PTR_ADDIU sp, $28, _THREAD_SIZE - 32
set_saved_sp sp, t0, t1
@@ -165,6 +156,10 @@ NESTED(kernel_entry, 16, sp) # kernel entry point
j start_kernel
END(kernel_entry)
+#ifdef CONFIG_QEMU
+ __INIT
+#endif
+
#ifdef CONFIG_SMP
/*
* SMP slave cpus entry point. Board specific code for bootstrap calls this
@@ -172,20 +167,7 @@ NESTED(kernel_entry, 16, sp) # kernel entry point
*/
NESTED(smp_bootstrap, 16, sp)
setup_c0_status_sec
-
-#ifdef CONFIG_SGI_IP27
- GET_NASID_ASM t1
- dli t0, KLDIR_OFFSET + (KLI_KERN_VARS * KLDIR_ENT_SIZE) + \
- KLDIR_OFF_POINTER + CAC_BASE
- dsll t1, NASID_SHFT
- or t0, t0, t1
- ld t0, 0(t0) # t0 points to kern_vars struct
- lh t1, KV_RO_NASID_OFFSET(t0)
- lh t2, KV_RW_NASID_OFFSET(t0)
- MAPPED_KERNEL_SETUP_TLB
- ARC64_TWIDDLE_PC
-#endif /* CONFIG_SGI_IP27 */
-
+ smp_slave_setup
j start_secondary
END(smp_bootstrap)
#endif /* CONFIG_SMP */
@@ -200,19 +182,13 @@ NESTED(smp_bootstrap, 16, sp)
.comm fw_arg2, SZREG, SZREG
.comm fw_arg3, SZREG, SZREG
- .macro page name, order=0
- .globl \name
-\name: .size \name, (_PAGE_SIZE << \order)
- .org . + (_PAGE_SIZE << \order)
- .type \name, @object
+ .macro page name, order
+ .comm \name, (_PAGE_SIZE << \order), (_PAGE_SIZE << \order)
.endm
- .data
- .align PAGE_SHIFT
-
/*
- * ... but on 64-bit we've got three-level pagetables with a
- * slightly different layout ...
+ * On 64-bit we've got three-level pagetables with a slightly
+ * different layout ...
*/
page swapper_pg_dir, _PGD_ORDER
#ifdef CONFIG_64BIT