diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/sparc/kernel/entry.S')
| -rw-r--r-- | ANDROID_3.4.5/arch/sparc/kernel/entry.S | 1673 |
1 files changed, 0 insertions, 1673 deletions
diff --git a/ANDROID_3.4.5/arch/sparc/kernel/entry.S b/ANDROID_3.4.5/arch/sparc/kernel/entry.S deleted file mode 100644 index f445e984..00000000 --- a/ANDROID_3.4.5/arch/sparc/kernel/entry.S +++ /dev/null @@ -1,1673 +0,0 @@ -/* arch/sparc/kernel/entry.S: Sparc trap low-level entry points. - * - * Copyright (C) 1995, 2007 David S. Miller (davem@davemloft.net) - * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be) - * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx) - * Copyright (C) 1996-1999 Jakub Jelinek (jj@sunsite.mff.cuni.cz) - * Copyright (C) 1997 Anton Blanchard (anton@progsoc.uts.edu.au) - */ - -#include <linux/errno.h> - -#include <asm/head.h> -#include <asm/asi.h> -#include <asm/smp.h> -#include <asm/contregs.h> -#include <asm/ptrace.h> -#include <asm/asm-offsets.h> -#include <asm/psr.h> -#include <asm/vaddrs.h> -#include <asm/memreg.h> -#include <asm/page.h> -#include <asm/pgtable.h> -#include <asm/pgtsun4c.h> -#include <asm/winmacro.h> -#include <asm/signal.h> -#include <asm/obio.h> -#include <asm/mxcc.h> -#include <asm/thread_info.h> -#include <asm/param.h> -#include <asm/unistd.h> - -#include <asm/asmmacro.h> - -#define curptr g6 - -/* These are just handy. */ -#define _SV save %sp, -STACKFRAME_SZ, %sp -#define _RS restore - -#define FLUSH_ALL_KERNEL_WINDOWS \ - _SV; _SV; _SV; _SV; _SV; _SV; _SV; \ - _RS; _RS; _RS; _RS; _RS; _RS; _RS; - - .text - -#ifdef CONFIG_KGDB - .align 4 - .globl arch_kgdb_breakpoint - .type arch_kgdb_breakpoint,#function -arch_kgdb_breakpoint: - ta 0x7d - retl - nop - .size arch_kgdb_breakpoint,.-arch_kgdb_breakpoint -#endif - -#if defined(CONFIG_BLK_DEV_FD) || defined(CONFIG_BLK_DEV_FD_MODULE) - .align 4 - .globl floppy_hardint -floppy_hardint: - /* - * This code cannot touch registers %l0 %l1 and %l2 - * because SAVE_ALL depends on their values. It depends - * on %l3 also, but we regenerate it before a call. - * Other registers are: - * %l3 -- base address of fdc registers - * %l4 -- pdma_vaddr - * %l5 -- scratch for ld/st address - * %l6 -- pdma_size - * %l7 -- scratch [floppy byte, ld/st address, aux. data] - */ - - /* Do we have work to do? */ - sethi %hi(doing_pdma), %l7 - ld [%l7 + %lo(doing_pdma)], %l7 - cmp %l7, 0 - be floppy_dosoftint - nop - - /* Load fdc register base */ - sethi %hi(fdc_status), %l3 - ld [%l3 + %lo(fdc_status)], %l3 - - /* Setup register addresses */ - sethi %hi(pdma_vaddr), %l5 ! transfer buffer - ld [%l5 + %lo(pdma_vaddr)], %l4 - sethi %hi(pdma_size), %l5 ! bytes to go - ld [%l5 + %lo(pdma_size)], %l6 -next_byte: - ldub [%l3], %l7 - - andcc %l7, 0x80, %g0 ! Does fifo still have data - bz floppy_fifo_emptied ! fifo has been emptied... - andcc %l7, 0x20, %g0 ! in non-dma mode still? - bz floppy_overrun ! nope, overrun - andcc %l7, 0x40, %g0 ! 0=write 1=read - bz floppy_write - sub %l6, 0x1, %l6 - - /* Ok, actually read this byte */ - ldub [%l3 + 1], %l7 - orcc %g0, %l6, %g0 - stb %l7, [%l4] - bne next_byte - add %l4, 0x1, %l4 - - b floppy_tdone - nop - -floppy_write: - /* Ok, actually write this byte */ - ldub [%l4], %l7 - orcc %g0, %l6, %g0 - stb %l7, [%l3 + 1] - bne next_byte - add %l4, 0x1, %l4 - - /* fall through... */ -floppy_tdone: - sethi %hi(pdma_vaddr), %l5 - st %l4, [%l5 + %lo(pdma_vaddr)] - sethi %hi(pdma_size), %l5 - st %l6, [%l5 + %lo(pdma_size)] - /* Flip terminal count pin */ - set auxio_register, %l7 - ld [%l7], %l7 - - set sparc_cpu_model, %l5 - ld [%l5], %l5 - subcc %l5, 1, %g0 /* enum { sun4c = 1 }; */ - be 1f - ldub [%l7], %l5 - - or %l5, 0xc2, %l5 - stb %l5, [%l7] - andn %l5, 0x02, %l5 - b 2f - nop - -1: - or %l5, 0xf4, %l5 - stb %l5, [%l7] - andn %l5, 0x04, %l5 - -2: - /* Kill some time so the bits set */ - WRITE_PAUSE - WRITE_PAUSE - - stb %l5, [%l7] - - /* Prevent recursion */ - sethi %hi(doing_pdma), %l7 - b floppy_dosoftint - st %g0, [%l7 + %lo(doing_pdma)] - - /* We emptied the FIFO, but we haven't read everything - * as of yet. Store the current transfer address and - * bytes left to read so we can continue when the next - * fast IRQ comes in. - */ -floppy_fifo_emptied: - sethi %hi(pdma_vaddr), %l5 - st %l4, [%l5 + %lo(pdma_vaddr)] - sethi %hi(pdma_size), %l7 - st %l6, [%l7 + %lo(pdma_size)] - - /* Restore condition codes */ - wr %l0, 0x0, %psr - WRITE_PAUSE - - jmp %l1 - rett %l2 - -floppy_overrun: - sethi %hi(pdma_vaddr), %l5 - st %l4, [%l5 + %lo(pdma_vaddr)] - sethi %hi(pdma_size), %l5 - st %l6, [%l5 + %lo(pdma_size)] - /* Prevent recursion */ - sethi %hi(doing_pdma), %l7 - st %g0, [%l7 + %lo(doing_pdma)] - - /* fall through... */ -floppy_dosoftint: - rd %wim, %l3 - SAVE_ALL - - /* Set all IRQs off. */ - or %l0, PSR_PIL, %l4 - wr %l4, 0x0, %psr - WRITE_PAUSE - wr %l4, PSR_ET, %psr - WRITE_PAUSE - - mov 11, %o0 ! floppy irq level (unused anyway) - mov %g0, %o1 ! devid is not used in fast interrupts - call sparc_floppy_irq - add %sp, STACKFRAME_SZ, %o2 ! struct pt_regs *regs - - RESTORE_ALL - -#endif /* (CONFIG_BLK_DEV_FD) */ - - /* Bad trap handler */ - .globl bad_trap_handler -bad_trap_handler: - SAVE_ALL - - wr %l0, PSR_ET, %psr - WRITE_PAUSE - - add %sp, STACKFRAME_SZ, %o0 ! pt_regs - call do_hw_interrupt - mov %l7, %o1 ! trap number - - RESTORE_ALL - -/* For now all IRQ's not registered get sent here. handler_irq() will - * see if a routine is registered to handle this interrupt and if not - * it will say so on the console. - */ - - .align 4 - .globl real_irq_entry, patch_handler_irq -real_irq_entry: - SAVE_ALL - -#ifdef CONFIG_SMP - .globl patchme_maybe_smp_msg - - cmp %l7, 11 -patchme_maybe_smp_msg: - bgu maybe_smp4m_msg - nop -#endif - -real_irq_continue: - or %l0, PSR_PIL, %g2 - wr %g2, 0x0, %psr - WRITE_PAUSE - wr %g2, PSR_ET, %psr - WRITE_PAUSE - mov %l7, %o0 ! irq level -patch_handler_irq: - call handler_irq - add %sp, STACKFRAME_SZ, %o1 ! pt_regs ptr - or %l0, PSR_PIL, %g2 ! restore PIL after handler_irq - wr %g2, PSR_ET, %psr ! keep ET up - WRITE_PAUSE - - RESTORE_ALL - -#ifdef CONFIG_SMP - /* SMP per-cpu ticker interrupts are handled specially. */ -smp4m_ticker: - bne real_irq_continue+4 - or %l0, PSR_PIL, %g2 - wr %g2, 0x0, %psr - WRITE_PAUSE - wr %g2, PSR_ET, %psr - WRITE_PAUSE - call smp4m_percpu_timer_interrupt - add %sp, STACKFRAME_SZ, %o0 - wr %l0, PSR_ET, %psr - WRITE_PAUSE - RESTORE_ALL - - /* Here is where we check for possible SMP IPI passed to us - * on some level other than 15 which is the NMI and only used - * for cross calls. That has a separate entry point below. - * - * IPIs are sent on Level 12, 13 and 14. See IRQ_IPI_*. - */ -maybe_smp4m_msg: - GET_PROCESSOR4M_ID(o3) - sethi %hi(sun4m_irq_percpu), %l5 - sll %o3, 2, %o3 - or %l5, %lo(sun4m_irq_percpu), %o5 - sethi %hi(0x70000000), %o2 ! Check all soft-IRQs - ld [%o5 + %o3], %o1 - ld [%o1 + 0x00], %o3 ! sun4m_irq_percpu[cpu]->pending - andcc %o3, %o2, %g0 - be,a smp4m_ticker - cmp %l7, 14 - /* Soft-IRQ IPI */ - st %o2, [%o1 + 0x04] ! sun4m_irq_percpu[cpu]->clear=0x70000000 - WRITE_PAUSE - ld [%o1 + 0x00], %g0 ! sun4m_irq_percpu[cpu]->pending - WRITE_PAUSE - or %l0, PSR_PIL, %l4 - wr %l4, 0x0, %psr - WRITE_PAUSE - wr %l4, PSR_ET, %psr - WRITE_PAUSE - srl %o3, 28, %o2 ! shift for simpler checks below -maybe_smp4m_msg_check_single: - andcc %o2, 0x1, %g0 - beq,a maybe_smp4m_msg_check_mask - andcc %o2, 0x2, %g0 - call smp_call_function_single_interrupt - nop - andcc %o2, 0x2, %g0 -maybe_smp4m_msg_check_mask: - beq,a maybe_smp4m_msg_check_resched - andcc %o2, 0x4, %g0 - call smp_call_function_interrupt - nop - andcc %o2, 0x4, %g0 -maybe_smp4m_msg_check_resched: - /* rescheduling is done in RESTORE_ALL regardless, but incr stats */ - beq,a maybe_smp4m_msg_out - nop - call smp_resched_interrupt - nop -maybe_smp4m_msg_out: - RESTORE_ALL - - .align 4 - .globl linux_trap_ipi15_sun4m -linux_trap_ipi15_sun4m: - SAVE_ALL - sethi %hi(0x80000000), %o2 - GET_PROCESSOR4M_ID(o0) - sethi %hi(sun4m_irq_percpu), %l5 - or %l5, %lo(sun4m_irq_percpu), %o5 - sll %o0, 2, %o0 - ld [%o5 + %o0], %o5 - ld [%o5 + 0x00], %o3 ! sun4m_irq_percpu[cpu]->pending - andcc %o3, %o2, %g0 - be 1f ! Must be an NMI async memory error - st %o2, [%o5 + 0x04] ! sun4m_irq_percpu[cpu]->clear=0x80000000 - WRITE_PAUSE - ld [%o5 + 0x00], %g0 ! sun4m_irq_percpu[cpu]->pending - WRITE_PAUSE - or %l0, PSR_PIL, %l4 - wr %l4, 0x0, %psr - WRITE_PAUSE - wr %l4, PSR_ET, %psr - WRITE_PAUSE - call smp4m_cross_call_irq - nop - b ret_trap_lockless_ipi - clr %l6 -1: - /* NMI async memory error handling. */ - sethi %hi(0x80000000), %l4 - sethi %hi(sun4m_irq_global), %o5 - ld [%o5 + %lo(sun4m_irq_global)], %l5 - st %l4, [%l5 + 0x0c] ! sun4m_irq_global->mask_set=0x80000000 - WRITE_PAUSE - ld [%l5 + 0x00], %g0 ! sun4m_irq_global->pending - WRITE_PAUSE - or %l0, PSR_PIL, %l4 - wr %l4, 0x0, %psr - WRITE_PAUSE - wr %l4, PSR_ET, %psr - WRITE_PAUSE - call sun4m_nmi - nop - st %l4, [%l5 + 0x08] ! sun4m_irq_global->mask_clear=0x80000000 - WRITE_PAUSE - ld [%l5 + 0x00], %g0 ! sun4m_irq_global->pending - WRITE_PAUSE - RESTORE_ALL - - .globl smp4d_ticker - /* SMP per-cpu ticker interrupts are handled specially. */ -smp4d_ticker: - SAVE_ALL - or %l0, PSR_PIL, %g2 - sethi %hi(CC_ICLR), %o0 - sethi %hi(1 << 14), %o1 - or %o0, %lo(CC_ICLR), %o0 - stha %o1, [%o0] ASI_M_MXCC /* Clear PIL 14 in MXCC's ICLR */ - wr %g2, 0x0, %psr - WRITE_PAUSE - wr %g2, PSR_ET, %psr - WRITE_PAUSE - call smp4d_percpu_timer_interrupt - add %sp, STACKFRAME_SZ, %o0 - wr %l0, PSR_ET, %psr - WRITE_PAUSE - RESTORE_ALL - - .align 4 - .globl linux_trap_ipi15_sun4d -linux_trap_ipi15_sun4d: - SAVE_ALL - sethi %hi(CC_BASE), %o4 - sethi %hi(MXCC_ERR_ME|MXCC_ERR_PEW|MXCC_ERR_ASE|MXCC_ERR_PEE), %o2 - or %o4, (CC_EREG - CC_BASE), %o0 - ldda [%o0] ASI_M_MXCC, %o0 - andcc %o0, %o2, %g0 - bne 1f - sethi %hi(BB_STAT2), %o2 - lduba [%o2] ASI_M_CTL, %o2 - andcc %o2, BB_STAT2_MASK, %g0 - bne 2f - or %o4, (CC_ICLR - CC_BASE), %o0 - sethi %hi(1 << 15), %o1 - stha %o1, [%o0] ASI_M_MXCC /* Clear PIL 15 in MXCC's ICLR */ - or %l0, PSR_PIL, %l4 - wr %l4, 0x0, %psr - WRITE_PAUSE - wr %l4, PSR_ET, %psr - WRITE_PAUSE - call smp4d_cross_call_irq - nop - b ret_trap_lockless_ipi - clr %l6 - -1: /* MXCC error */ -2: /* BB error */ - /* Disable PIL 15 */ - set CC_IMSK, %l4 - lduha [%l4] ASI_M_MXCC, %l5 - sethi %hi(1 << 15), %l7 - or %l5, %l7, %l5 - stha %l5, [%l4] ASI_M_MXCC - /* FIXME */ -1: b,a 1b - -#ifdef CONFIG_SPARC_LEON - .globl smpleon_ipi - .extern leon_ipi_interrupt - /* SMP per-cpu IPI interrupts are handled specially. */ -smpleon_ipi: - SAVE_ALL - or %l0, PSR_PIL, %g2 - wr %g2, 0x0, %psr - WRITE_PAUSE - wr %g2, PSR_ET, %psr - WRITE_PAUSE - call leonsmp_ipi_interrupt - add %sp, STACKFRAME_SZ, %o1 ! pt_regs - wr %l0, PSR_ET, %psr - WRITE_PAUSE - RESTORE_ALL - - .align 4 - .globl linux_trap_ipi15_leon -linux_trap_ipi15_leon: - SAVE_ALL - or %l0, PSR_PIL, %l4 - wr %l4, 0x0, %psr - WRITE_PAUSE - wr %l4, PSR_ET, %psr - WRITE_PAUSE - call leon_cross_call_irq - nop - b ret_trap_lockless_ipi - clr %l6 - -#endif /* CONFIG_SPARC_LEON */ - -#endif /* CONFIG_SMP */ - - /* This routine handles illegal instructions and privileged - * instruction attempts from user code. - */ - .align 4 - .globl bad_instruction -bad_instruction: - sethi %hi(0xc1f80000), %l4 - ld [%l1], %l5 - sethi %hi(0x81d80000), %l7 - and %l5, %l4, %l5 - cmp %l5, %l7 - be 1f - SAVE_ALL - - wr %l0, PSR_ET, %psr ! re-enable traps - WRITE_PAUSE - - add %sp, STACKFRAME_SZ, %o0 - mov %l1, %o1 - mov %l2, %o2 - call do_illegal_instruction - mov %l0, %o3 - - RESTORE_ALL - -1: /* unimplemented flush - just skip */ - jmpl %l2, %g0 - rett %l2 + 4 - - .align 4 - .globl priv_instruction -priv_instruction: - SAVE_ALL - - wr %l0, PSR_ET, %psr - WRITE_PAUSE - - add %sp, STACKFRAME_SZ, %o0 - mov %l1, %o1 - mov %l2, %o2 - call do_priv_instruction - mov %l0, %o3 - - RESTORE_ALL - - /* This routine handles unaligned data accesses. */ - .align 4 - .globl mna_handler -mna_handler: - andcc %l0, PSR_PS, %g0 - be mna_fromuser - nop - - SAVE_ALL - - wr %l0, PSR_ET, %psr - WRITE_PAUSE - - ld [%l1], %o1 - call kernel_unaligned_trap - add %sp, STACKFRAME_SZ, %o0 - - RESTORE_ALL - -mna_fromuser: - SAVE_ALL - - wr %l0, PSR_ET, %psr ! re-enable traps - WRITE_PAUSE - - ld [%l1], %o1 - call user_unaligned_trap - add %sp, STACKFRAME_SZ, %o0 - - RESTORE_ALL - - /* This routine handles floating point disabled traps. */ - .align 4 - .globl fpd_trap_handler -fpd_trap_handler: - SAVE_ALL - - wr %l0, PSR_ET, %psr ! re-enable traps - WRITE_PAUSE - - add %sp, STACKFRAME_SZ, %o0 - mov %l1, %o1 - mov %l2, %o2 - call do_fpd_trap - mov %l0, %o3 - - RESTORE_ALL - - /* This routine handles Floating Point Exceptions. */ - .align 4 - .globl fpe_trap_handler -fpe_trap_handler: - set fpsave_magic, %l5 - cmp %l1, %l5 - be 1f - sethi %hi(fpsave), %l5 - or %l5, %lo(fpsave), %l5 - cmp %l1, %l5 - bne 2f - sethi %hi(fpsave_catch2), %l5 - or %l5, %lo(fpsave_catch2), %l5 - wr %l0, 0x0, %psr - WRITE_PAUSE - jmp %l5 - rett %l5 + 4 -1: - sethi %hi(fpsave_catch), %l5 - or %l5, %lo(fpsave_catch), %l5 - wr %l0, 0x0, %psr - WRITE_PAUSE - jmp %l5 - rett %l5 + 4 - -2: - SAVE_ALL - - wr %l0, PSR_ET, %psr ! re-enable traps - WRITE_PAUSE - - add %sp, STACKFRAME_SZ, %o0 - mov %l1, %o1 - mov %l2, %o2 - call do_fpe_trap - mov %l0, %o3 - - RESTORE_ALL - - /* This routine handles Tag Overflow Exceptions. */ - .align 4 - .globl do_tag_overflow -do_tag_overflow: - SAVE_ALL - - wr %l0, PSR_ET, %psr ! re-enable traps - WRITE_PAUSE - - add %sp, STACKFRAME_SZ, %o0 - mov %l1, %o1 - mov %l2, %o2 - call handle_tag_overflow - mov %l0, %o3 - - RESTORE_ALL - - /* This routine handles Watchpoint Exceptions. */ - .align 4 - .globl do_watchpoint -do_watchpoint: - SAVE_ALL - - wr %l0, PSR_ET, %psr ! re-enable traps - WRITE_PAUSE - - add %sp, STACKFRAME_SZ, %o0 - mov %l1, %o1 - mov %l2, %o2 - call handle_watchpoint - mov %l0, %o3 - - RESTORE_ALL - - /* This routine handles Register Access Exceptions. */ - .align 4 - .globl do_reg_access -do_reg_access: - SAVE_ALL - - wr %l0, PSR_ET, %psr ! re-enable traps - WRITE_PAUSE - - add %sp, STACKFRAME_SZ, %o0 - mov %l1, %o1 - mov %l2, %o2 - call handle_reg_access - mov %l0, %o3 - - RESTORE_ALL - - /* This routine handles Co-Processor Disabled Exceptions. */ - .align 4 - .globl do_cp_disabled -do_cp_disabled: - SAVE_ALL - - wr %l0, PSR_ET, %psr ! re-enable traps - WRITE_PAUSE - - add %sp, STACKFRAME_SZ, %o0 - mov %l1, %o1 - mov %l2, %o2 - call handle_cp_disabled - mov %l0, %o3 - - RESTORE_ALL - - /* This routine handles Co-Processor Exceptions. */ - .align 4 - .globl do_cp_exception -do_cp_exception: - SAVE_ALL - - wr %l0, PSR_ET, %psr ! re-enable traps - WRITE_PAUSE - - add %sp, STACKFRAME_SZ, %o0 - mov %l1, %o1 - mov %l2, %o2 - call handle_cp_exception - mov %l0, %o3 - - RESTORE_ALL - - /* This routine handles Hardware Divide By Zero Exceptions. */ - .align 4 - .globl do_hw_divzero -do_hw_divzero: - SAVE_ALL - - wr %l0, PSR_ET, %psr ! re-enable traps - WRITE_PAUSE - - add %sp, STACKFRAME_SZ, %o0 - mov %l1, %o1 - mov %l2, %o2 - call handle_hw_divzero - mov %l0, %o3 - - RESTORE_ALL - - .align 4 - .globl do_flush_windows -do_flush_windows: - SAVE_ALL - - wr %l0, PSR_ET, %psr - WRITE_PAUSE - - andcc %l0, PSR_PS, %g0 - bne dfw_kernel - nop - - call flush_user_windows - nop - - /* Advance over the trap instruction. */ - ld [%sp + STACKFRAME_SZ + PT_NPC], %l1 - add %l1, 0x4, %l2 - st %l1, [%sp + STACKFRAME_SZ + PT_PC] - st %l2, [%sp + STACKFRAME_SZ + PT_NPC] - - RESTORE_ALL - - .globl flush_patch_one - - /* We get these for debugging routines using __builtin_return_address() */ -dfw_kernel: -flush_patch_one: - FLUSH_ALL_KERNEL_WINDOWS - - /* Advance over the trap instruction. */ - ld [%sp + STACKFRAME_SZ + PT_NPC], %l1 - add %l1, 0x4, %l2 - st %l1, [%sp + STACKFRAME_SZ + PT_PC] - st %l2, [%sp + STACKFRAME_SZ + PT_NPC] - - RESTORE_ALL - - /* The getcc software trap. The user wants the condition codes from - * the %psr in register %g1. - */ - - .align 4 - .globl getcc_trap_handler -getcc_trap_handler: - srl %l0, 20, %g1 ! give user - and %g1, 0xf, %g1 ! only ICC bits in %psr - jmp %l2 ! advance over trap instruction - rett %l2 + 0x4 ! like this... - - /* The setcc software trap. The user has condition codes in %g1 - * that it would like placed in the %psr. Be careful not to flip - * any unintentional bits! - */ - - .align 4 - .globl setcc_trap_handler -setcc_trap_handler: - sll %g1, 0x14, %l4 - set PSR_ICC, %l5 - andn %l0, %l5, %l0 ! clear ICC bits in %psr - and %l4, %l5, %l4 ! clear non-ICC bits in user value - or %l4, %l0, %l4 ! or them in... mix mix mix - - wr %l4, 0x0, %psr ! set new %psr - WRITE_PAUSE ! TI scumbags... - - jmp %l2 ! advance over trap instruction - rett %l2 + 0x4 ! like this... - - .align 4 - .globl linux_trap_nmi_sun4c -linux_trap_nmi_sun4c: - SAVE_ALL - - /* Ugh, we need to clear the IRQ line. This is now - * a very sun4c specific trap handler... - */ - sethi %hi(interrupt_enable), %l5 - ld [%l5 + %lo(interrupt_enable)], %l5 - ldub [%l5], %l6 - andn %l6, INTS_ENAB, %l6 - stb %l6, [%l5] - - /* Now it is safe to re-enable traps without recursion. */ - or %l0, PSR_PIL, %l0 - wr %l0, PSR_ET, %psr - WRITE_PAUSE - - /* Now call the c-code with the pt_regs frame ptr and the - * memory error registers as arguments. The ordering chosen - * here is due to unlatching semantics. - */ - sethi %hi(AC_SYNC_ERR), %o0 - add %o0, 0x4, %o0 - lda [%o0] ASI_CONTROL, %o2 ! sync vaddr - sub %o0, 0x4, %o0 - lda [%o0] ASI_CONTROL, %o1 ! sync error - add %o0, 0xc, %o0 - lda [%o0] ASI_CONTROL, %o4 ! async vaddr - sub %o0, 0x4, %o0 - lda [%o0] ASI_CONTROL, %o3 ! async error - call sparc_lvl15_nmi - add %sp, STACKFRAME_SZ, %o0 - - RESTORE_ALL - - .align 4 - .globl invalid_segment_patch1_ff - .globl invalid_segment_patch2_ff -invalid_segment_patch1_ff: cmp %l4, 0xff -invalid_segment_patch2_ff: mov 0xff, %l3 - - .align 4 - .globl invalid_segment_patch1_1ff - .globl invalid_segment_patch2_1ff -invalid_segment_patch1_1ff: cmp %l4, 0x1ff -invalid_segment_patch2_1ff: mov 0x1ff, %l3 - - .align 4 - .globl num_context_patch1_16, num_context_patch2_16 -num_context_patch1_16: mov 0x10, %l7 -num_context_patch2_16: mov 0x10, %l7 - - .align 4 - .globl vac_linesize_patch_32 -vac_linesize_patch_32: subcc %l7, 32, %l7 - - .align 4 - .globl vac_hwflush_patch1_on, vac_hwflush_patch2_on - -/* - * Ugly, but we can't use hardware flushing on the sun4 and we'd require - * two instructions (Anton) - */ -vac_hwflush_patch1_on: addcc %l7, -PAGE_SIZE, %l7 - -vac_hwflush_patch2_on: sta %g0, [%l3 + %l7] ASI_HWFLUSHSEG - - .globl invalid_segment_patch1, invalid_segment_patch2 - .globl num_context_patch1 - .globl vac_linesize_patch, vac_hwflush_patch1 - .globl vac_hwflush_patch2 - - .align 4 - .globl sun4c_fault - -! %l0 = %psr -! %l1 = %pc -! %l2 = %npc -! %l3 = %wim -! %l7 = 1 for textfault -! We want error in %l5, vaddr in %l6 -sun4c_fault: - sethi %hi(AC_SYNC_ERR), %l4 - add %l4, 0x4, %l6 ! AC_SYNC_VA in %l6 - lda [%l6] ASI_CONTROL, %l5 ! Address - lda [%l4] ASI_CONTROL, %l6 ! Error, retained for a bit - - andn %l5, 0xfff, %l5 ! Encode all info into l7 - srl %l6, 14, %l4 - - and %l4, 2, %l4 - or %l5, %l4, %l4 - - or %l4, %l7, %l7 ! l7 = [addr,write,txtfault] - - andcc %l0, PSR_PS, %g0 - be sun4c_fault_fromuser - andcc %l7, 1, %g0 ! Text fault? - - be 1f - sethi %hi(KERNBASE), %l4 - - mov %l1, %l5 ! PC - -1: - cmp %l5, %l4 - blu sun4c_fault_fromuser - sethi %hi(~((1 << SUN4C_REAL_PGDIR_SHIFT) - 1)), %l4 - - /* If the kernel references a bum kernel pointer, or a pte which - * points to a non existent page in ram, we will run this code - * _forever_ and lock up the machine!!!!! So we must check for - * this condition, the AC_SYNC_ERR bits are what we must examine. - * Also a parity error would make this happen as well. So we just - * check that we are in fact servicing a tlb miss and not some - * other type of fault for the kernel. - */ - andcc %l6, 0x80, %g0 - be sun4c_fault_fromuser - and %l5, %l4, %l5 - - /* Test for NULL pte_t * in vmalloc area. */ - sethi %hi(VMALLOC_START), %l4 - cmp %l5, %l4 - blu,a invalid_segment_patch1 - lduXa [%l5] ASI_SEGMAP, %l4 - - sethi %hi(swapper_pg_dir), %l4 - srl %l5, SUN4C_PGDIR_SHIFT, %l6 - or %l4, %lo(swapper_pg_dir), %l4 - sll %l6, 2, %l6 - ld [%l4 + %l6], %l4 - andcc %l4, PAGE_MASK, %g0 - be sun4c_fault_fromuser - lduXa [%l5] ASI_SEGMAP, %l4 - -invalid_segment_patch1: - cmp %l4, 0x7f - bne 1f - sethi %hi(sun4c_kfree_ring), %l4 - or %l4, %lo(sun4c_kfree_ring), %l4 - ld [%l4 + 0x18], %l3 - deccc %l3 ! do we have a free entry? - bcs,a 2f ! no, unmap one. - sethi %hi(sun4c_kernel_ring), %l4 - - st %l3, [%l4 + 0x18] ! sun4c_kfree_ring.num_entries-- - - ld [%l4 + 0x00], %l6 ! entry = sun4c_kfree_ring.ringhd.next - st %l5, [%l6 + 0x08] ! entry->vaddr = address - - ld [%l6 + 0x00], %l3 ! next = entry->next - ld [%l6 + 0x04], %l7 ! entry->prev - - st %l7, [%l3 + 0x04] ! next->prev = entry->prev - st %l3, [%l7 + 0x00] ! entry->prev->next = next - - sethi %hi(sun4c_kernel_ring), %l4 - or %l4, %lo(sun4c_kernel_ring), %l4 - ! head = &sun4c_kernel_ring.ringhd - - ld [%l4 + 0x00], %l7 ! head->next - - st %l4, [%l6 + 0x04] ! entry->prev = head - st %l7, [%l6 + 0x00] ! entry->next = head->next - st %l6, [%l7 + 0x04] ! head->next->prev = entry - - st %l6, [%l4 + 0x00] ! head->next = entry - - ld [%l4 + 0x18], %l3 - inc %l3 ! sun4c_kernel_ring.num_entries++ - st %l3, [%l4 + 0x18] - b 4f - ld [%l6 + 0x08], %l5 - -2: - or %l4, %lo(sun4c_kernel_ring), %l4 - ! head = &sun4c_kernel_ring.ringhd - - ld [%l4 + 0x04], %l6 ! entry = head->prev - - ld [%l6 + 0x08], %l3 ! tmp = entry->vaddr - - ! Flush segment from the cache. - sethi %hi((64 * 1024)), %l7 -9: -vac_hwflush_patch1: -vac_linesize_patch: - subcc %l7, 16, %l7 - bne 9b -vac_hwflush_patch2: - sta %g0, [%l3 + %l7] ASI_FLUSHSEG - - st %l5, [%l6 + 0x08] ! entry->vaddr = address - - ld [%l6 + 0x00], %l5 ! next = entry->next - ld [%l6 + 0x04], %l7 ! entry->prev - - st %l7, [%l5 + 0x04] ! next->prev = entry->prev - st %l5, [%l7 + 0x00] ! entry->prev->next = next - st %l4, [%l6 + 0x04] ! entry->prev = head - - ld [%l4 + 0x00], %l7 ! head->next - - st %l7, [%l6 + 0x00] ! entry->next = head->next - st %l6, [%l7 + 0x04] ! head->next->prev = entry - st %l6, [%l4 + 0x00] ! head->next = entry - - mov %l3, %l5 ! address = tmp - -4: -num_context_patch1: - mov 0x08, %l7 - - ld [%l6 + 0x08], %l4 - ldub [%l6 + 0x0c], %l3 - or %l4, %l3, %l4 ! encode new vaddr/pseg into l4 - - sethi %hi(AC_CONTEXT), %l3 - lduba [%l3] ASI_CONTROL, %l6 - - /* Invalidate old mapping, instantiate new mapping, - * for each context. Registers l6/l7 are live across - * this loop. - */ -3: deccc %l7 - sethi %hi(AC_CONTEXT), %l3 - stba %l7, [%l3] ASI_CONTROL -invalid_segment_patch2: - mov 0x7f, %l3 - stXa %l3, [%l5] ASI_SEGMAP - andn %l4, 0x1ff, %l3 - bne 3b - stXa %l4, [%l3] ASI_SEGMAP - - sethi %hi(AC_CONTEXT), %l3 - stba %l6, [%l3] ASI_CONTROL - - andn %l4, 0x1ff, %l5 - -1: - sethi %hi(VMALLOC_START), %l4 - cmp %l5, %l4 - - bgeu 1f - mov 1 << (SUN4C_REAL_PGDIR_SHIFT - PAGE_SHIFT), %l7 - - sethi %hi(KERNBASE), %l6 - - sub %l5, %l6, %l4 - srl %l4, PAGE_SHIFT, %l4 - sethi %hi((SUN4C_PAGE_KERNEL & 0xf4000000)), %l3 - or %l3, %l4, %l3 - - sethi %hi(PAGE_SIZE), %l4 - -2: - sta %l3, [%l5] ASI_PTE - deccc %l7 - inc %l3 - bne 2b - add %l5, %l4, %l5 - - b 7f - sethi %hi(sun4c_kernel_faults), %l4 - -1: - srl %l5, SUN4C_PGDIR_SHIFT, %l3 - sethi %hi(swapper_pg_dir), %l4 - or %l4, %lo(swapper_pg_dir), %l4 - sll %l3, 2, %l3 - ld [%l4 + %l3], %l4 - and %l4, PAGE_MASK, %l4 - - srl %l5, (PAGE_SHIFT - 2), %l6 - and %l6, ((SUN4C_PTRS_PER_PTE - 1) << 2), %l6 - add %l6, %l4, %l6 - - sethi %hi(PAGE_SIZE), %l4 - -2: - ld [%l6], %l3 - deccc %l7 - sta %l3, [%l5] ASI_PTE - add %l6, 0x4, %l6 - bne 2b - add %l5, %l4, %l5 - - sethi %hi(sun4c_kernel_faults), %l4 -7: - ld [%l4 + %lo(sun4c_kernel_faults)], %l3 - inc %l3 - st %l3, [%l4 + %lo(sun4c_kernel_faults)] - - /* Restore condition codes */ - wr %l0, 0x0, %psr - WRITE_PAUSE - jmp %l1 - rett %l2 - -sun4c_fault_fromuser: - SAVE_ALL - nop - - mov %l7, %o1 ! Decode the info from %l7 - mov %l7, %o2 - and %o1, 1, %o1 ! arg2 = text_faultp - mov %l7, %o3 - and %o2, 2, %o2 ! arg3 = writep - andn %o3, 0xfff, %o3 ! arg4 = faulting address - - wr %l0, PSR_ET, %psr - WRITE_PAUSE - - call do_sun4c_fault - add %sp, STACKFRAME_SZ, %o0 ! arg1 = pt_regs ptr - - RESTORE_ALL - - .align 4 - .globl srmmu_fault -srmmu_fault: - mov 0x400, %l5 - mov 0x300, %l4 - - lda [%l5] ASI_M_MMUREGS, %l6 ! read sfar first - lda [%l4] ASI_M_MMUREGS, %l5 ! read sfsr last - - andn %l6, 0xfff, %l6 - srl %l5, 6, %l5 ! and encode all info into l7 - - and %l5, 2, %l5 - or %l5, %l6, %l6 - - or %l6, %l7, %l7 ! l7 = [addr,write,txtfault] - - SAVE_ALL - - mov %l7, %o1 - mov %l7, %o2 - and %o1, 1, %o1 ! arg2 = text_faultp - mov %l7, %o3 - and %o2, 2, %o2 ! arg3 = writep - andn %o3, 0xfff, %o3 ! arg4 = faulting address - - wr %l0, PSR_ET, %psr - WRITE_PAUSE - - call do_sparc_fault - add %sp, STACKFRAME_SZ, %o0 ! arg1 = pt_regs ptr - - RESTORE_ALL - - .align 4 - .globl sys_nis_syscall -sys_nis_syscall: - mov %o7, %l5 - add %sp, STACKFRAME_SZ, %o0 ! pt_regs *regs arg - call c_sys_nis_syscall - mov %l5, %o7 - - .align 4 - .globl sys_execve -sys_execve: - mov %o7, %l5 - add %sp, STACKFRAME_SZ, %o0 ! pt_regs *regs arg - call sparc_execve - mov %l5, %o7 - - .globl sunos_execv -sunos_execv: - st %g0, [%sp + STACKFRAME_SZ + PT_I2] - - call sparc_execve - add %sp, STACKFRAME_SZ, %o0 - - b ret_sys_call - ld [%sp + STACKFRAME_SZ + PT_I0], %o0 - - .align 4 - .globl sys_sparc_pipe -sys_sparc_pipe: - mov %o7, %l5 - add %sp, STACKFRAME_SZ, %o0 ! pt_regs *regs arg - call sparc_pipe - mov %l5, %o7 - - .align 4 - .globl sys_sigaltstack -sys_sigaltstack: - mov %o7, %l5 - mov %fp, %o2 - call do_sigaltstack - mov %l5, %o7 - - .align 4 - .globl sys_sigstack -sys_sigstack: - mov %o7, %l5 - mov %fp, %o2 - call do_sys_sigstack - mov %l5, %o7 - - .align 4 - .globl sys_sigreturn -sys_sigreturn: - call do_sigreturn - add %sp, STACKFRAME_SZ, %o0 - - ld [%curptr + TI_FLAGS], %l5 - andcc %l5, _TIF_SYSCALL_TRACE, %g0 - be 1f - nop - - call syscall_trace - nop - -1: - /* We don't want to muck with user registers like a - * normal syscall, just return. - */ - RESTORE_ALL - - .align 4 - .globl sys_rt_sigreturn -sys_rt_sigreturn: - call do_rt_sigreturn - add %sp, STACKFRAME_SZ, %o0 - - ld [%curptr + TI_FLAGS], %l5 - andcc %l5, _TIF_SYSCALL_TRACE, %g0 - be 1f - nop - - add %sp, STACKFRAME_SZ, %o0 - call syscall_trace - mov 1, %o1 - -1: - /* We are returning to a signal handler. */ - RESTORE_ALL - - /* Now that we have a real sys_clone, sys_fork() is - * implemented in terms of it. Our _real_ implementation - * of SunOS vfork() will use sys_vfork(). - * - * XXX These three should be consolidated into mostly shared - * XXX code just like on sparc64... -DaveM - */ - .align 4 - .globl sys_fork, flush_patch_two -sys_fork: - mov %o7, %l5 -flush_patch_two: - FLUSH_ALL_KERNEL_WINDOWS; - ld [%curptr + TI_TASK], %o4 - rd %psr, %g4 - WRITE_PAUSE - mov SIGCHLD, %o0 ! arg0: clone flags - rd %wim, %g5 - WRITE_PAUSE - mov %fp, %o1 ! arg1: usp - std %g4, [%o4 + AOFF_task_thread + AOFF_thread_fork_kpsr] - add %sp, STACKFRAME_SZ, %o2 ! arg2: pt_regs ptr - mov 0, %o3 - call sparc_do_fork - mov %l5, %o7 - - /* Whee, kernel threads! */ - .globl sys_clone, flush_patch_three -sys_clone: - mov %o7, %l5 -flush_patch_three: - FLUSH_ALL_KERNEL_WINDOWS; - ld [%curptr + TI_TASK], %o4 - rd %psr, %g4 - WRITE_PAUSE - - /* arg0,1: flags,usp -- loaded already */ - cmp %o1, 0x0 ! Is new_usp NULL? - rd %wim, %g5 - WRITE_PAUSE - be,a 1f - mov %fp, %o1 ! yes, use callers usp - andn %o1, 7, %o1 ! no, align to 8 bytes -1: - std %g4, [%o4 + AOFF_task_thread + AOFF_thread_fork_kpsr] - add %sp, STACKFRAME_SZ, %o2 ! arg2: pt_regs ptr - mov 0, %o3 - call sparc_do_fork - mov %l5, %o7 - - /* Whee, real vfork! */ - .globl sys_vfork, flush_patch_four -sys_vfork: -flush_patch_four: - FLUSH_ALL_KERNEL_WINDOWS; - ld [%curptr + TI_TASK], %o4 - rd %psr, %g4 - WRITE_PAUSE - rd %wim, %g5 - WRITE_PAUSE - std %g4, [%o4 + AOFF_task_thread + AOFF_thread_fork_kpsr] - sethi %hi(0x4000 | 0x0100 | SIGCHLD), %o0 - mov %fp, %o1 - or %o0, %lo(0x4000 | 0x0100 | SIGCHLD), %o0 - sethi %hi(sparc_do_fork), %l1 - mov 0, %o3 - jmpl %l1 + %lo(sparc_do_fork), %g0 - add %sp, STACKFRAME_SZ, %o2 - - .align 4 -linux_sparc_ni_syscall: - sethi %hi(sys_ni_syscall), %l7 - b syscall_is_too_hard - or %l7, %lo(sys_ni_syscall), %l7 - -linux_fast_syscall: - andn %l7, 3, %l7 - mov %i0, %o0 - mov %i1, %o1 - mov %i2, %o2 - jmpl %l7 + %g0, %g0 - mov %i3, %o3 - -linux_syscall_trace: - add %sp, STACKFRAME_SZ, %o0 - call syscall_trace - mov 0, %o1 - cmp %o0, 0 - bne 3f - mov -ENOSYS, %o0 - mov %i0, %o0 - mov %i1, %o1 - mov %i2, %o2 - mov %i3, %o3 - b 2f - mov %i4, %o4 - - .globl ret_from_fork -ret_from_fork: - call schedule_tail - ld [%g3 + TI_TASK], %o0 - b ret_sys_call - ld [%sp + STACKFRAME_SZ + PT_I0], %o0 - - /* Linux native system calls enter here... */ - .align 4 - .globl linux_sparc_syscall -linux_sparc_syscall: - sethi %hi(PSR_SYSCALL), %l4 - or %l0, %l4, %l0 - /* Direct access to user regs, must faster. */ - cmp %g1, NR_syscalls - bgeu linux_sparc_ni_syscall - sll %g1, 2, %l4 - ld [%l7 + %l4], %l7 - andcc %l7, 1, %g0 - bne linux_fast_syscall - /* Just do first insn from SAVE_ALL in the delay slot */ - -syscall_is_too_hard: - SAVE_ALL_HEAD - rd %wim, %l3 - - wr %l0, PSR_ET, %psr - mov %i0, %o0 - mov %i1, %o1 - mov %i2, %o2 - - ld [%curptr + TI_FLAGS], %l5 - mov %i3, %o3 - andcc %l5, _TIF_SYSCALL_TRACE, %g0 - mov %i4, %o4 - bne linux_syscall_trace - mov %i0, %l5 -2: - call %l7 - mov %i5, %o5 - -3: - st %o0, [%sp + STACKFRAME_SZ + PT_I0] - -ret_sys_call: - ld [%curptr + TI_FLAGS], %l6 - cmp %o0, -ERESTART_RESTARTBLOCK - ld [%sp + STACKFRAME_SZ + PT_PSR], %g3 - set PSR_C, %g2 - bgeu 1f - andcc %l6, _TIF_SYSCALL_TRACE, %g0 - - /* System call success, clear Carry condition code. */ - andn %g3, %g2, %g3 - clr %l6 - st %g3, [%sp + STACKFRAME_SZ + PT_PSR] - bne linux_syscall_trace2 - ld [%sp + STACKFRAME_SZ + PT_NPC], %l1 /* pc = npc */ - add %l1, 0x4, %l2 /* npc = npc+4 */ - st %l1, [%sp + STACKFRAME_SZ + PT_PC] - b ret_trap_entry - st %l2, [%sp + STACKFRAME_SZ + PT_NPC] -1: - /* System call failure, set Carry condition code. - * Also, get abs(errno) to return to the process. - */ - sub %g0, %o0, %o0 - or %g3, %g2, %g3 - st %o0, [%sp + STACKFRAME_SZ + PT_I0] - mov 1, %l6 - st %g3, [%sp + STACKFRAME_SZ + PT_PSR] - bne linux_syscall_trace2 - ld [%sp + STACKFRAME_SZ + PT_NPC], %l1 /* pc = npc */ - add %l1, 0x4, %l2 /* npc = npc+4 */ - st %l1, [%sp + STACKFRAME_SZ + PT_PC] - b ret_trap_entry - st %l2, [%sp + STACKFRAME_SZ + PT_NPC] - -linux_syscall_trace2: - add %sp, STACKFRAME_SZ, %o0 - mov 1, %o1 - call syscall_trace - add %l1, 0x4, %l2 /* npc = npc+4 */ - st %l1, [%sp + STACKFRAME_SZ + PT_PC] - b ret_trap_entry - st %l2, [%sp + STACKFRAME_SZ + PT_NPC] - - -/* Saving and restoring the FPU state is best done from lowlevel code. - * - * void fpsave(unsigned long *fpregs, unsigned long *fsr, - * void *fpqueue, unsigned long *fpqdepth) - */ - - .globl fpsave -fpsave: - st %fsr, [%o1] ! this can trap on us if fpu is in bogon state - ld [%o1], %g1 - set 0x2000, %g4 - andcc %g1, %g4, %g0 - be 2f - mov 0, %g2 - - /* We have an fpqueue to save. */ -1: - std %fq, [%o2] -fpsave_magic: - st %fsr, [%o1] - ld [%o1], %g3 - andcc %g3, %g4, %g0 - add %g2, 1, %g2 - bne 1b - add %o2, 8, %o2 - -2: - st %g2, [%o3] - - std %f0, [%o0 + 0x00] - std %f2, [%o0 + 0x08] - std %f4, [%o0 + 0x10] - std %f6, [%o0 + 0x18] - std %f8, [%o0 + 0x20] - std %f10, [%o0 + 0x28] - std %f12, [%o0 + 0x30] - std %f14, [%o0 + 0x38] - std %f16, [%o0 + 0x40] - std %f18, [%o0 + 0x48] - std %f20, [%o0 + 0x50] - std %f22, [%o0 + 0x58] - std %f24, [%o0 + 0x60] - std %f26, [%o0 + 0x68] - std %f28, [%o0 + 0x70] - retl - std %f30, [%o0 + 0x78] - - /* Thanks for Theo Deraadt and the authors of the Sprite/netbsd/openbsd - * code for pointing out this possible deadlock, while we save state - * above we could trap on the fsr store so our low level fpu trap - * code has to know how to deal with this. - */ -fpsave_catch: - b fpsave_magic + 4 - st %fsr, [%o1] - -fpsave_catch2: - b fpsave + 4 - st %fsr, [%o1] - - /* void fpload(unsigned long *fpregs, unsigned long *fsr); */ - - .globl fpload -fpload: - ldd [%o0 + 0x00], %f0 - ldd [%o0 + 0x08], %f2 - ldd [%o0 + 0x10], %f4 - ldd [%o0 + 0x18], %f6 - ldd [%o0 + 0x20], %f8 - ldd [%o0 + 0x28], %f10 - ldd [%o0 + 0x30], %f12 - ldd [%o0 + 0x38], %f14 - ldd [%o0 + 0x40], %f16 - ldd [%o0 + 0x48], %f18 - ldd [%o0 + 0x50], %f20 - ldd [%o0 + 0x58], %f22 - ldd [%o0 + 0x60], %f24 - ldd [%o0 + 0x68], %f26 - ldd [%o0 + 0x70], %f28 - ldd [%o0 + 0x78], %f30 - ld [%o1], %fsr - retl - nop - - /* __ndelay and __udelay take two arguments: - * 0 - nsecs or usecs to delay - * 1 - per_cpu udelay_val (loops per jiffy) - * - * Note that ndelay gives HZ times higher resolution but has a 10ms - * limit. udelay can handle up to 1s. - */ - .globl __ndelay -__ndelay: - save %sp, -STACKFRAME_SZ, %sp - mov %i0, %o0 - call .umul ! round multiplier up so large ns ok - mov 0x1ae, %o1 ! 2**32 / (1 000 000 000 / HZ) - call .umul - mov %i1, %o1 ! udelay_val - ba delay_continue - mov %o1, %o0 ! >>32 later for better resolution - - .globl __udelay -__udelay: - save %sp, -STACKFRAME_SZ, %sp - mov %i0, %o0 - sethi %hi(0x10c7), %o1 ! round multiplier up so large us ok - call .umul - or %o1, %lo(0x10c7), %o1 ! 2**32 / 1 000 000 - call .umul - mov %i1, %o1 ! udelay_val - sethi %hi(0x028f4b62), %l0 ! Add in rounding constant * 2**32, - or %g0, %lo(0x028f4b62), %l0 - addcc %o0, %l0, %o0 ! 2**32 * 0.009 999 - bcs,a 3f - add %o1, 0x01, %o1 -3: - call .umul - mov HZ, %o0 ! >>32 earlier for wider range - -delay_continue: - cmp %o0, 0x0 -1: - bne 1b - subcc %o0, 1, %o0 - - ret - restore - - /* Handle a software breakpoint */ - /* We have to inform parent that child has stopped */ - .align 4 - .globl breakpoint_trap -breakpoint_trap: - rd %wim,%l3 - SAVE_ALL - wr %l0, PSR_ET, %psr - WRITE_PAUSE - - st %i0, [%sp + STACKFRAME_SZ + PT_G0] ! for restarting syscalls - call sparc_breakpoint - add %sp, STACKFRAME_SZ, %o0 - - RESTORE_ALL - -#ifdef CONFIG_KGDB - .align 4 - .globl kgdb_trap_low - .type kgdb_trap_low,#function -kgdb_trap_low: - rd %wim,%l3 - SAVE_ALL - wr %l0, PSR_ET, %psr - WRITE_PAUSE - - call kgdb_trap - add %sp, STACKFRAME_SZ, %o0 - - RESTORE_ALL - .size kgdb_trap_low,.-kgdb_trap_low -#endif - - .align 4 - .globl flush_patch_exception -flush_patch_exception: - FLUSH_ALL_KERNEL_WINDOWS; - ldd [%o0], %o6 - jmpl %o7 + 0xc, %g0 ! see asm-sparc/processor.h - mov 1, %g1 ! signal EFAULT condition - - .align 4 - .globl kill_user_windows, kuw_patch1_7win - .globl kuw_patch1 -kuw_patch1_7win: sll %o3, 6, %o3 - - /* No matter how much overhead this routine has in the worst - * case scenerio, it is several times better than taking the - * traps with the old method of just doing flush_user_windows(). - */ -kill_user_windows: - ld [%g6 + TI_UWINMASK], %o0 ! get current umask - orcc %g0, %o0, %g0 ! if no bits set, we are done - be 3f ! nothing to do - rd %psr, %o5 ! must clear interrupts - or %o5, PSR_PIL, %o4 ! or else that could change - wr %o4, 0x0, %psr ! the uwinmask state - WRITE_PAUSE ! burn them cycles -1: - ld [%g6 + TI_UWINMASK], %o0 ! get consistent state - orcc %g0, %o0, %g0 ! did an interrupt come in? - be 4f ! yep, we are done - rd %wim, %o3 ! get current wim - srl %o3, 1, %o4 ! simulate a save -kuw_patch1: - sll %o3, 7, %o3 ! compute next wim - or %o4, %o3, %o3 ! result - andncc %o0, %o3, %o0 ! clean this bit in umask - bne kuw_patch1 ! not done yet - srl %o3, 1, %o4 ! begin another save simulation - wr %o3, 0x0, %wim ! set the new wim - st %g0, [%g6 + TI_UWINMASK] ! clear uwinmask -4: - wr %o5, 0x0, %psr ! re-enable interrupts - WRITE_PAUSE ! burn baby burn -3: - retl ! return - st %g0, [%g6 + TI_W_SAVED] ! no windows saved - - .align 4 - .globl restore_current -restore_current: - LOAD_CURRENT(g6, o0) - retl - nop - -#ifdef CONFIG_PCIC_PCI -#include <asm/pcic.h> - - .align 4 - .globl linux_trap_ipi15_pcic -linux_trap_ipi15_pcic: - rd %wim, %l3 - SAVE_ALL - - /* - * First deactivate NMI - * or we cannot drop ET, cannot get window spill traps. - * The busy loop is necessary because the PIO error - * sometimes does not go away quickly and we trap again. - */ - sethi %hi(pcic_regs), %o1 - ld [%o1 + %lo(pcic_regs)], %o2 - - ! Get pending status for printouts later. - ld [%o2 + PCI_SYS_INT_PENDING], %o0 - - mov PCI_SYS_INT_PENDING_CLEAR_ALL, %o1 - stb %o1, [%o2 + PCI_SYS_INT_PENDING_CLEAR] -1: - ld [%o2 + PCI_SYS_INT_PENDING], %o1 - andcc %o1, ((PCI_SYS_INT_PENDING_PIO|PCI_SYS_INT_PENDING_PCI)>>24), %g0 - bne 1b - nop - - or %l0, PSR_PIL, %l4 - wr %l4, 0x0, %psr - WRITE_PAUSE - wr %l4, PSR_ET, %psr - WRITE_PAUSE - - call pcic_nmi - add %sp, STACKFRAME_SZ, %o1 ! struct pt_regs *regs - RESTORE_ALL - - .globl pcic_nmi_trap_patch -pcic_nmi_trap_patch: - sethi %hi(linux_trap_ipi15_pcic), %l3 - jmpl %l3 + %lo(linux_trap_ipi15_pcic), %g0 - rd %psr, %l0 - .word 0 - -#endif /* CONFIG_PCIC_PCI */ - - .globl flushw_all -flushw_all: - save %sp, -0x40, %sp - save %sp, -0x40, %sp - save %sp, -0x40, %sp - save %sp, -0x40, %sp - save %sp, -0x40, %sp - save %sp, -0x40, %sp - save %sp, -0x40, %sp - restore - restore - restore - restore - restore - restore - ret - restore - -/* End of entry.S */ |