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84 lines
2.6 KiB
84 lines
2.6 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __SPARC_HEAD_H |
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#define __SPARC_HEAD_H |
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#define KERNBASE 0xf0000000 /* First address the kernel will eventually be */ |
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#define WRITE_PAUSE nop; nop; nop; /* Have to do this after %wim/%psr chg */ |
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/* Here are some trap goodies */ |
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/* Generic trap entry. */ |
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#define TRAP_ENTRY(type, label) \ |
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rd %psr, %l0; b label; rd %wim, %l3; nop; |
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/* Data/text faults */ |
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#define SRMMU_TFAULT rd %psr, %l0; rd %wim, %l3; b srmmu_fault; mov 1, %l7; |
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#define SRMMU_DFAULT rd %psr, %l0; rd %wim, %l3; b srmmu_fault; mov 0, %l7; |
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/* This is for traps we should NEVER get. */ |
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#define BAD_TRAP(num) \ |
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rd %psr, %l0; mov num, %l7; b bad_trap_handler; rd %wim, %l3; |
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/* This is for traps when we want just skip the instruction which caused it */ |
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#define SKIP_TRAP(type, name) \ |
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jmpl %l2, %g0; rett %l2 + 4; nop; nop; |
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/* Notice that for the system calls we pull a trick. We load up a |
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* different pointer to the system call vector table in %l7, but call |
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* the same generic system call low-level entry point. The trap table |
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* entry sequences are also HyperSparc pipeline friendly ;-) |
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*/ |
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/* Software trap for Linux system calls. */ |
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#define LINUX_SYSCALL_TRAP \ |
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sethi %hi(sys_call_table), %l7; \ |
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or %l7, %lo(sys_call_table), %l7; \ |
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b linux_sparc_syscall; \ |
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rd %psr, %l0; |
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#define BREAKPOINT_TRAP \ |
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b breakpoint_trap; \ |
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rd %psr,%l0; \ |
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nop; \ |
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nop; |
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#ifdef CONFIG_KGDB |
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#define KGDB_TRAP(num) \ |
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mov num, %l7; \ |
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b kgdb_trap_low; \ |
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rd %psr,%l0; \ |
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nop; |
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#else |
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#define KGDB_TRAP(num) \ |
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BAD_TRAP(num) |
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#endif |
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/* The Get Condition Codes software trap for userland. */ |
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#define GETCC_TRAP \ |
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b getcc_trap_handler; rd %psr, %l0; nop; nop; |
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/* The Set Condition Codes software trap for userland. */ |
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#define SETCC_TRAP \ |
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b setcc_trap_handler; rd %psr, %l0; nop; nop; |
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/* The Get PSR software trap for userland. */ |
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#define GETPSR_TRAP \ |
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rd %psr, %i0; jmp %l2; rett %l2 + 4; nop; |
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/* This is for hard interrupts from level 1-14, 15 is non-maskable (nmi) and |
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* gets handled with another macro. |
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*/ |
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#define TRAP_ENTRY_INTERRUPT(int_level) \ |
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mov int_level, %l7; rd %psr, %l0; b real_irq_entry; rd %wim, %l3; |
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/* Window overflows/underflows are special and we need to try to be as |
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* efficient as possible here.... |
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*/ |
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#define WINDOW_SPILL \ |
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rd %psr, %l0; rd %wim, %l3; b spill_window_entry; andcc %l0, PSR_PS, %g0; |
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#define WINDOW_FILL \ |
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rd %psr, %l0; rd %wim, %l3; b fill_window_entry; andcc %l0, PSR_PS, %g0; |
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#endif /* __SPARC_HEAD_H */
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