1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __SPARC_HEAD_H
3#define __SPARC_HEAD_H
4
5#define KERNBASE        0xf0000000  /* First address the kernel will eventually be */
6
7#define WRITE_PAUSE      nop; nop; nop; /* Have to do this after %wim/%psr chg */
8
9/* Here are some trap goodies */
10
11/* Generic trap entry. */
12#define TRAP_ENTRY(type, label) \
13	rd %psr, %l0; b label; rd %wim, %l3; nop;
14
15/* Data/text faults */
16#define SRMMU_TFAULT rd %psr, %l0; rd %wim, %l3; b srmmu_fault; mov 1, %l7;
17#define SRMMU_DFAULT rd %psr, %l0; rd %wim, %l3; b srmmu_fault; mov 0, %l7;
18
19/* This is for traps we should NEVER get. */
20#define BAD_TRAP(num) \
21        rd %psr, %l0; mov num, %l7; b bad_trap_handler; rd %wim, %l3;
22
23/* This is for traps when we want just skip the instruction which caused it */
24#define SKIP_TRAP(type, name) \
25	jmpl %l2, %g0; rett %l2 + 4; nop; nop;
26
27/* Notice that for the system calls we pull a trick.  We load up a
28 * different pointer to the system call vector table in %l7, but call
29 * the same generic system call low-level entry point.  The trap table
30 * entry sequences are also HyperSparc pipeline friendly ;-)
31 */
32
33/* Software trap for Linux system calls. */
34#define LINUX_SYSCALL_TRAP \
35        sethi %hi(sys_call_table), %l7; \
36        or %l7, %lo(sys_call_table), %l7; \
37        b linux_sparc_syscall; \
38        rd %psr, %l0;
39
40#define BREAKPOINT_TRAP \
41	b breakpoint_trap; \
42	rd %psr,%l0; \
43	nop; \
44	nop;
45
46#ifdef CONFIG_KGDB
47#define KGDB_TRAP(num)                  \
48	mov num, %l7;                   \
49	b kgdb_trap_low;                \
50	rd %psr,%l0;                    \
51	nop;
52#else
53#define KGDB_TRAP(num) \
54	BAD_TRAP(num)
55#endif
56
57/* The Get Condition Codes software trap for userland. */
58#define GETCC_TRAP \
59        b getcc_trap_handler; rd %psr, %l0; nop; nop;
60
61/* The Set Condition Codes software trap for userland. */
62#define SETCC_TRAP \
63        b setcc_trap_handler; rd %psr, %l0; nop; nop;
64
65/* The Get PSR software trap for userland. */
66#define GETPSR_TRAP \
67	rd %psr, %i0; jmp %l2; rett %l2 + 4; nop;
68
69/* This is for hard interrupts from level 1-14, 15 is non-maskable (nmi) and
70 * gets handled with another macro.
71 */
72#define TRAP_ENTRY_INTERRUPT(int_level) \
73        mov int_level, %l7; rd %psr, %l0; b real_irq_entry; rd %wim, %l3;
74
75/* Window overflows/underflows are special and we need to try to be as
76 * efficient as possible here....
77 */
78#define WINDOW_SPILL \
79        rd %psr, %l0; rd %wim, %l3; b spill_window_entry; andcc %l0, PSR_PS, %g0;
80
81#define WINDOW_FILL \
82        rd %psr, %l0; rd %wim, %l3; b fill_window_entry; andcc %l0, PSR_PS, %g0;
83
84#endif /* __SPARC_HEAD_H */
85