This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / arm / kernel / head-nommu.S

diff --git a/arch/arm/kernel/head-nommu.S b/arch/arm/kernel/head-nommu.S
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+/*
+ *  linux/arch/arm/kernel/head-nommu.S
+ *
+ *  Copyright (C) 1994-2002 Russell King
+ *  Copyright (C) 2003-2006 Hyok S. Choi
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ *  Common kernel startup code (non-paged MM)
+ *    for 32-bit CPUs which has a process ID register(CP15).
+ *
+ */
+#include <linux/config.h>
+#include <linux/linkage.h>
+#include <linux/init.h>
+
+#include <asm/assembler.h>
+#include <asm/mach-types.h>
+#include <asm/procinfo.h>
+#include <asm/ptrace.h>
+#include <asm/asm-offsets.h>
+#include <asm/thread_info.h>
+#include <asm/system.h>
+
+/*
+ * Kernel startup entry point.
+ * ---------------------------
+ *
+ * This is normally called from the decompressor code.  The requirements
+ * are: MMU = off, D-cache = off, I-cache = dont care, r0 = 0,
+ * r1 = machine nr.
+ *
+ * See linux/arch/arm/tools/mach-types for the complete list of machine
+ * numbers for r1.
+ *
+ */
+       __INIT
+       .type   stext, %function
+ENTRY(stext)
+       msr     cpsr_c, #PSR_F_BIT | PSR_I_BIT | MODE_SVC @ ensure svc mode
+                                               @ and irqs disabled
+       mrc     p15, 0, r9, c0, c0              @ get processor id
+       bl      __lookup_processor_type         @ r5=procinfo r9=cpuid
+       movs    r10, r5                         @ invalid processor (r5=0)?
+       beq     __error_p                               @ yes, error 'p'
+       bl      __lookup_machine_type           @ r5=machinfo
+       movs    r8, r5                          @ invalid machine (r5=0)?
+       beq     __error_a                       @ yes, error 'a'
+
+       ldr     r13, __switch_data              @ address to jump to after
+                                               @ the initialization is done
+       adr     lr, __after_proc_init           @ return (PIC) address
+       add     pc, r10, #PROCINFO_INITFUNC
+
+/*
+ * Set the Control Register and Read the process ID.
+ */
+       .type   __after_proc_init, %function
+__after_proc_init:
+       mrc     p15, 0, r0, c1, c0, 0           @ read control reg
+#ifdef CONFIG_ALIGNMENT_TRAP
+       orr     r0, r0, #CR_A
+#else
+       bic     r0, r0, #CR_A
+#endif
+#ifdef CONFIG_CPU_DCACHE_DISABLE
+       bic     r0, r0, #CR_C
+#endif
+#ifdef CONFIG_CPU_BPREDICT_DISABLE
+       bic     r0, r0, #CR_Z
+#endif
+#ifdef CONFIG_CPU_ICACHE_DISABLE
+       bic     r0, r0, #CR_I
+#endif
+       mcr     p15, 0, r0, c1, c0, 0           @ write control reg
+
+       mov     pc, r13                         @ clear the BSS and jump
+                                               @ to start_kernel
+       .ltorg
+
+#include "head-common.S"