*
* Copyright (C) 1994, 1995 Waldorf Electronics
* Written by Ralf Baechle and Andreas Busse
- * Copyright (C) 1994, 95, 96, 97, 98, 99, 2003 Ralf Baechle
+ * Copyright (C) 1994 - 99, 2003, 06 Ralf Baechle
* Copyright (C) 1996 Paul M. Antoine
* Modified for DECStation and hence R3000 support by Paul M. Antoine
* Further modifications by David S. Miller and Harald Koerfgen
* Kevin Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com
* Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
*/
-#include <linux/config.h>
#include <linux/init.h>
#include <linux/threads.h>
#include <asm/asm.h>
+#include <asm/asmmacro.h>
+#include <asm/irqflags.h>
#include <asm/regdef.h>
#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)
#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.
*/
.endm
/*
- * For the moment set ST0_KU so the CPU will not spit fire when
- * executing 64-bit instructions. The full initialization of the
- * CPU's status register is done later in per_cpu_trap_init().
+ * For the moment disable interrupts, mark the kernel mode and
+ * set ST0_KX so that the CPU does not spit fire when using
+ * 64-bit addresses. A full initialization of the CPU's status
+ * register is done later in per_cpu_trap_init().
*/
- .macro setup_c0_status
-#ifdef CONFIG_MIPS64
+ .macro setup_c0_status set clr
+ .set push
+#ifdef CONFIG_MIPS_MT_SMTC
+ /*
+ * For SMTC, we need to set privilege and disable interrupts only for
+ * the current TC, using the TCStatus register.
+ */
+ mfc0 t0, CP0_TCSTATUS
+ /* Fortunately CU 0 is in the same place in both registers */
+ /* Set TCU0, TMX, TKSU (for later inversion) and IXMT */
+ li t1, ST0_CU0 | 0x08001c00
+ or t0, t1
+ /* Clear TKSU, leave IXMT */
+ xori t0, 0x00001800
+ mtc0 t0, CP0_TCSTATUS
+ _ehb
+ /* We need to leave the global IE bit set, but clear EXL...*/
+ mfc0 t0, CP0_STATUS
+ or t0, ST0_CU0 | ST0_EXL | ST0_ERL | \set | \clr
+ xor t0, ST0_EXL | ST0_ERL | \clr
+ mtc0 t0, CP0_STATUS
+#else
mfc0 t0, CP0_STATUS
- or t0, ST0_KX
+ or t0, ST0_CU0|\set|0x1f|\clr
+ xor t0, 0x1f|\clr
mtc0 t0, CP0_STATUS
+ .set noreorder
+ sll zero,3 # ehb
+#endif
+ .set pop
+ .endm
+
+ .macro setup_c0_status_pri
+#ifdef CONFIG_64BIT
+ setup_c0_status ST0_KX 0
+#else
+ setup_c0_status 0 0
+#endif
+ .endm
+
+ .macro setup_c0_status_sec
+#ifdef CONFIG_64BIT
+ setup_c0_status ST0_KX ST0_BEV
+#else
+ setup_c0_status 0 ST0_BEV
#endif
.endm
EXPORT(stext) # used for profiling
EXPORT(_stext)
+#ifdef 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
-#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
- CLI # disable interrupts
+#ifdef CONFIG_MIPS_MT_SMTC
+ /*
+ * In SMTC kernel, "CLI" is thread-specific, in TCStatus.
+ * We still need to enable interrupts globally in Status,
+ * and clear EXL/ERL.
+ *
+ * TCContext is used to track interrupt levels under
+ * service in SMTC kernel. Clear for boot TC before
+ * allowing any interrupts.
+ */
+ mtc0 zero, CP0_TCCONTEXT
+
+ mfc0 t0, CP0_STATUS
+ ori t0, t0, 0xff1f
+ xori t0, t0, 0x001e
+ mtc0 t0, CP0_STATUS
+#endif /* CONFIG_MIPS_MT_SMTC */
PTR_LA t0, __bss_start # clear .bss
LONG_S zero, (t0)
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
+ PTR_LI sp, _THREAD_SIZE - 32
+ PTR_ADDU sp, $28
set_saved_sp sp, t0, t1
PTR_SUBU sp, 4 * SZREG # init stack pointer
- jal start_kernel
+ 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
* function after setting up the stack and gp registers.
*/
NESTED(smp_bootstrap, 16, sp)
-#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 */
-
- CLI
- setup_c0_status
- jal start_secondary
+#ifdef CONFIG_MIPS_MT_SMTC
+ /*
+ * Read-modify-writes of Status must be atomic, and this
+ * is one case where CLI is invoked without EXL being
+ * necessarily set. The CLI and setup_c0_status will
+ * in fact be redundant for all but the first TC of
+ * each VPE being booted.
+ */
+ DMT 10 # dmt t2 /* t0, t1 are used by CLI and setup_c0_status() */
+ jal mips_ihb
+#endif /* CONFIG_MIPS_MT_SMTC */
+ setup_c0_status_sec
+ smp_slave_setup
+#ifdef CONFIG_MIPS_MT_SMTC
+ andi t2, t2, VPECONTROL_TE
+ beqz t2, 2f
+ EMT # emt
+2:
+#endif /* CONFIG_MIPS_MT_SMTC */
+ j start_secondary
END(smp_bootstrap)
#endif /* CONFIG_SMP */
.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_MIPS64
+#ifdef CONFIG_64BIT
+#if defined(CONFIG_MODULES) && !defined(CONFIG_BUILD_ELF64)
+ page module_pg_dir, _PGD_ORDER
+#endif
page invalid_pmd_table, _PMD_ORDER
#endif
page invalid_pte_table, _PTE_ORDER
-
-#ifdef CONFIG_MIPS64
- /*
- * 64-bit kernel mappings are really screwed up ...
- */
- page kptbl, _PGD_ORDER
- .globl ekptbl
- page kpmdtbl, 0
-ekptbl:
-#endif
git://git.onelab.eu / linux-2.6.git / blobdiff