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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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2 | #ifndef __SPARC_HEAD_H |
3 | #define __SPARC_HEAD_H | |
4 | ||
5 | #define KERNBASE 0xf0000000 /* First address the kernel will eventually be */ | |
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6 | |
7 | #define WRITE_PAUSE nop; nop; nop; /* Have to do this after %wim/%psr chg */ | |
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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 | ||
306f1231 | 15 | /* Data/text faults */ |
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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 | |
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47 | #define KGDB_TRAP(num) \ |
48 | mov num, %l7; \ | |
49 | b kgdb_trap_low; \ | |
50 | rd %psr,%l0; \ | |
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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 \ | |
598ec971 | 59 | b getcc_trap_handler; rd %psr, %l0; nop; nop; |
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60 | |
61 | /* The Set Condition Codes software trap for userland. */ | |
62 | #define SETCC_TRAP \ | |
598ec971 | 63 | b setcc_trap_handler; rd %psr, %l0; nop; nop; |
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64 | |
65 | /* The Get PSR software trap for userland. */ | |
66 | #define GETPSR_TRAP \ | |
598ec971 | 67 | rd %psr, %i0; jmp %l2; rett %l2 + 4; nop; |
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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 | ||
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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 */ |