diff options
Diffstat (limited to 'target/linux/realtek/files/arch/rlx/kernel/genex.S')
| -rw-r--r-- | target/linux/realtek/files/arch/rlx/kernel/genex.S | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/target/linux/realtek/files/arch/rlx/kernel/genex.S b/target/linux/realtek/files/arch/rlx/kernel/genex.S new file mode 100644 index 000000000..0c3be93d9 --- /dev/null +++ b/target/linux/realtek/files/arch/rlx/kernel/genex.S @@ -0,0 +1,217 @@ +/* + * 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) 1994 - 2000, 2001, 2003 Ralf Baechle + * Copyright (C) 1999, 2000 Silicon Graphics, Inc. + * Copyright (C) 2001 MIPS Technologies, Inc. + * Copyright (C) 2002, 2007 Maciej W. Rozycki + */ +#include <linux/init.h> + +#include <asm/asm.h> +#include <asm/asmmacro.h> +#include <asm/cacheops.h> +#include <asm/irqflags.h> +#include <asm/regdef.h> +#include <asm/rlxregs.h> +#include <asm/stackframe.h> +#include <asm/page.h> +#include <asm/thread_info.h> + +#define PANIC_PIC(msg) \ + .set push; \ + .set reorder; \ + PTR_LA a0,8f; \ + .set noat; \ + PTR_LA AT, panic; \ + jr AT; \ +9: b 9b; \ + .set pop; \ + TEXT(msg) + + __INIT + +/* + * rlx_trap_dispatch: exception vector for all RLX CPUs + * + * Be careful when changing this, it has to be at most 128 bytes + * to fit into space reserved for the exception handler. + */ +NESTED(rlx_trap_dispatch, 0, sp) + .set push + .set noat + mfc0 k1, CP0_CAUSE + andi k1, k1, 0x7c + PTR_L k0, exception_handlers(k1) + jr k0 + .set pop + END(rlx_trap_dispatch) + + __FINIT + + .align 5 +NESTED(rlx_irq_dispatch, PT_SIZE, sp) +#ifdef CONFIG_TRACE_IRQFLAGS + /* + * Check to see if the interrupted code has just disabled + * interrupts and ignore this interrupt for now if so. + * + * local_irq_disable() disables interrupts and then calls + * trace_hardirqs_off() to track the state. If an interrupt is taken + * after interrupts are disabled but before the state is updated + * it will appear to restore_all that it is incorrectly returning with + * interrupts disabled + */ + .set push + .set noat + mfc0 k0, CP0_STATUS + and k0, ST0_IEP + bnez k0, 1f + + mfc0 k0, CP0_EPC + .set noreorder + j k0 + rfe +1: + .set pop +#endif + SAVE_ALL + CLI + TRACE_IRQS_OFF + + LONG_L s0, TI_REGS($28) + LONG_S sp, TI_REGS($28) + PTR_LA ra, ret_from_irq + j bsp_irq_dispatch + END(rlx_irq_dispatch) + + .align 6 +NESTED(rlx_vec_dispatch, PT_SIZE, sp) + .set push + .set noreorder + b 0f + nop + b 1f + nop + b 2f + nop + b 3f + nop + b 4f + nop + b 5f + nop + b 6f + nop + b 7f + nop + +0: SAVE_SP + b 9f + li k1, 0 + +1: SAVE_SP + b 9f + li k1, 1 + +2: SAVE_SP + b 9f + li k1, 2 + +3: SAVE_SP + b 9f + li k1, 3 + +4: SAVE_SP + b 9f + li k1, 4 + +5: SAVE_SP + b 9f + li k1, 5 + +6: SAVE_SP + b 9f + li k1, 6 + +7: SAVE_SP + li k1, 7 + .set pop + +9: SAVE_ALL_BUT_SP + CLI + TRACE_IRQS_OFF + + LONG_L s0, TI_REGS($28) + LONG_S sp, TI_REGS($28) + PTR_LA ra, ret_from_irq + move a0, k1 + j rlx_do_lopi_IRQ + END(rlx_vec_dispatch) + + .macro __build_clear_none + .endm + + .macro __build_clear_sti + TRACE_IRQS_ON + STI + .endm + + .macro __build_clear_cli + CLI + TRACE_IRQS_OFF + .endm + + .macro __build_clear_ade + MFC0 t0, CP0_BADVADDR + PTR_S t0, PT_BVADDR(sp) + KMODE + .endm + + .macro __BUILD_silent exception + .endm + + /* Gas tries to parse the PRINT argument as a string containing + string escapes and emits bogus warnings if it believes to + recognize an unknown escape code. So make the arguments + start with an n and gas will believe \n is ok ... */ + .macro __BUILD_verbose nexception + LONG_L a1, PT_EPC(sp) + PRINT("Got \nexception at %08lx\012") + .endm + + .macro __BUILD_count exception + LONG_L t0,exception_count_\exception + LONG_ADDIU t0, 1 + LONG_S t0,exception_count_\exception + .comm exception_count\exception, 8, 8 + .endm + + .macro __BUILD_HANDLER exception handler clear verbose ext + .align 5 + NESTED(handle_\exception, PT_SIZE, sp) + .set noat + SAVE_ALL + FEXPORT(handle_\exception\ext) + __BUILD_clear_\clear + .set at + __BUILD_\verbose \exception + move a0, sp + PTR_LA ra, ret_from_exception + j do_\handler + END(handle_\exception) + .endm + + .macro BUILD_HANDLER exception handler clear verbose + __BUILD_HANDLER \exception \handler \clear \verbose _int + .endm + + BUILD_HANDLER adel ade ade silent /* #4 */ + BUILD_HANDLER ades ade ade silent /* #5 */ + BUILD_HANDLER bp bp sti silent /* #9 */ + BUILD_HANDLER ri ri sti silent /* #10 */ + BUILD_HANDLER cpu cpu sti silent /* #11 */ + BUILD_HANDLER ov ov sti silent /* #12 */ + BUILD_HANDLER reserved reserved sti verbose /* others */ |