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sparc: Add kgdb support.
[deliverable/linux.git] / arch / sparc / kernel / head.S
1 /* $Id: head.S,v 1.105 2001/08/12 09:08:56 davem Exp $
2 * head.S: The initial boot code for the Sparc port of Linux.
3 *
4 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 1995,1999 Pete Zaitcev (zaitcev@yahoo.com)
6 * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
7 * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
8 * Copyright (C) 1997 Michael A. Griffith (grif@acm.org)
9 *
10 * CompactPCI platform by Eric Brower, 1999.
11 */
12
13 #include <linux/version.h>
14 #include <linux/init.h>
15
16 #include <asm/head.h>
17 #include <asm/asi.h>
18 #include <asm/contregs.h>
19 #include <asm/ptrace.h>
20 #include <asm/psr.h>
21 #include <asm/page.h>
22 #include <asm/kdebug.h>
23 #include <asm/winmacro.h>
24 #include <asm/thread_info.h> /* TI_UWINMASK */
25 #include <asm/errno.h>
26 #include <asm/pgtsrmmu.h> /* SRMMU_PGDIR_SHIFT */
27
28 .data
29 /*
30 * The following are used with the prom_vector node-ops to figure out
31 * the cpu-type
32 */
33
34 .align 4
35 .globl cputyp
36 cputyp:
37 .word 1
38
39 .align 4
40 .globl cputypval
41 cputypval:
42 .asciz "sun4c"
43 .ascii " "
44
45 cputypvalend:
46 cputypvallen = cputypvar - cputypval
47
48 .align 4
49 /*
50 * Sun people can't spell worth damn. "compatability" indeed.
51 * At least we *know* we can't spell, and use a spell-checker.
52 */
53
54 /* Uh, actually Linus it is I who cannot spell. Too much murky
55 * Sparc assembly will do this to ya.
56 */
57 cputypvar:
58 .asciz "compatability"
59
60 /* Tested on SS-5, SS-10. Probably someone at Sun applied a spell-checker. */
61 .align 4
62 cputypvar_sun4m:
63 .asciz "compatible"
64
65 .align 4
66
67 #ifndef CONFIG_SUN4
68 sun4_notsup:
69 .asciz "Sparc-Linux sun4 needs a specially compiled kernel, turn CONFIG_SUN4 on.\n\n"
70 .align 4
71 #else
72 sun4cdm_notsup:
73 .asciz "Kernel compiled with CONFIG_SUN4 cannot run on SUN4C/SUN4M/SUN4D\nTurn CONFIG_SUN4 off.\n\n"
74 .align 4
75 #endif
76
77 sun4e_notsup:
78 .asciz "Sparc-Linux sun4e support does not exist\n\n"
79 .align 4
80
81 /* The Sparc trap table, bootloader gives us control at _start. */
82 .text
83 .globl start, _stext, _start, __stext
84 .globl trapbase
85 _start: /* danger danger */
86 __stext:
87 _stext:
88 start:
89 trapbase:
90 #ifdef CONFIG_SMP
91 trapbase_cpu0:
92 #endif
93 /* We get control passed to us here at t_zero. */
94 t_zero: b gokernel; nop; nop; nop;
95 t_tflt: SPARC_TFAULT /* Inst. Access Exception */
96 t_bins: TRAP_ENTRY(0x2, bad_instruction) /* Illegal Instruction */
97 t_pins: TRAP_ENTRY(0x3, priv_instruction) /* Privileged Instruction */
98 t_fpd: TRAP_ENTRY(0x4, fpd_trap_handler) /* Floating Point Disabled */
99 t_wovf: WINDOW_SPILL /* Window Overflow */
100 t_wunf: WINDOW_FILL /* Window Underflow */
101 t_mna: TRAP_ENTRY(0x7, mna_handler) /* Memory Address Not Aligned */
102 t_fpe: TRAP_ENTRY(0x8, fpe_trap_handler) /* Floating Point Exception */
103 t_dflt: SPARC_DFAULT /* Data Miss Exception */
104 t_tio: TRAP_ENTRY(0xa, do_tag_overflow) /* Tagged Instruction Ovrflw */
105 t_wpt: TRAP_ENTRY(0xb, do_watchpoint) /* Watchpoint Detected */
106 t_badc: BAD_TRAP(0xc) BAD_TRAP(0xd) BAD_TRAP(0xe) BAD_TRAP(0xf) BAD_TRAP(0x10)
107 t_irq1: TRAP_ENTRY_INTERRUPT(1) /* IRQ Software/SBUS Level 1 */
108 t_irq2: TRAP_ENTRY_INTERRUPT(2) /* IRQ SBUS Level 2 */
109 t_irq3: TRAP_ENTRY_INTERRUPT(3) /* IRQ SCSI/DMA/SBUS Level 3 */
110 t_irq4: TRAP_ENTRY_INTERRUPT(4) /* IRQ Software Level 4 */
111 t_irq5: TRAP_ENTRY_INTERRUPT(5) /* IRQ SBUS/Ethernet Level 5 */
112 t_irq6: TRAP_ENTRY_INTERRUPT(6) /* IRQ Software Level 6 */
113 t_irq7: TRAP_ENTRY_INTERRUPT(7) /* IRQ Video/SBUS Level 5 */
114 t_irq8: TRAP_ENTRY_INTERRUPT(8) /* IRQ SBUS Level 6 */
115 t_irq9: TRAP_ENTRY_INTERRUPT(9) /* IRQ SBUS Level 7 */
116 t_irq10:TRAP_ENTRY_INTERRUPT(10) /* IRQ Timer #1 (one we use) */
117 t_irq11:TRAP_ENTRY_INTERRUPT(11) /* IRQ Floppy Intr. */
118 t_irq12:TRAP_ENTRY_INTERRUPT(12) /* IRQ Zilog serial chip */
119 t_irq13:TRAP_ENTRY_INTERRUPT(13) /* IRQ Audio Intr. */
120 t_irq14:TRAP_ENTRY_INTERRUPT(14) /* IRQ Timer #2 */
121 .globl t_nmi
122 #ifndef CONFIG_SMP
123 t_nmi: NMI_TRAP /* Level 15 (NMI) */
124 #else
125 t_nmi: TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m)
126 #endif
127 t_racc: TRAP_ENTRY(0x20, do_reg_access) /* General Register Access Error */
128 t_iacce:BAD_TRAP(0x21) /* Instr Access Error */
129 t_bad22:BAD_TRAP(0x22) BAD_TRAP(0x23)
130 t_cpdis:TRAP_ENTRY(0x24, do_cp_disabled) /* Co-Processor Disabled */
131 t_uflsh:SKIP_TRAP(0x25, unimp_flush) /* Unimplemented FLUSH inst. */
132 t_bad26:BAD_TRAP(0x26) BAD_TRAP(0x27)
133 t_cpexc:TRAP_ENTRY(0x28, do_cp_exception) /* Co-Processor Exception */
134 t_dacce:SPARC_DFAULT /* Data Access Error */
135 t_hwdz: TRAP_ENTRY(0x2a, do_hw_divzero) /* Division by zero, you lose... */
136 t_dserr:BAD_TRAP(0x2b) /* Data Store Error */
137 t_daccm:BAD_TRAP(0x2c) /* Data Access MMU-Miss */
138 t_bad2d:BAD_TRAP(0x2d) BAD_TRAP(0x2e) BAD_TRAP(0x2f) BAD_TRAP(0x30) BAD_TRAP(0x31)
139 t_bad32:BAD_TRAP(0x32) BAD_TRAP(0x33) BAD_TRAP(0x34) BAD_TRAP(0x35) BAD_TRAP(0x36)
140 t_bad37:BAD_TRAP(0x37) BAD_TRAP(0x38) BAD_TRAP(0x39) BAD_TRAP(0x3a) BAD_TRAP(0x3b)
141 t_iaccm:BAD_TRAP(0x3c) /* Instr Access MMU-Miss */
142 t_bad3d:BAD_TRAP(0x3d) BAD_TRAP(0x3e) BAD_TRAP(0x3f) BAD_TRAP(0x40) BAD_TRAP(0x41)
143 t_bad42:BAD_TRAP(0x42) BAD_TRAP(0x43) BAD_TRAP(0x44) BAD_TRAP(0x45) BAD_TRAP(0x46)
144 t_bad47:BAD_TRAP(0x47) BAD_TRAP(0x48) BAD_TRAP(0x49) BAD_TRAP(0x4a) BAD_TRAP(0x4b)
145 t_bad4c:BAD_TRAP(0x4c) BAD_TRAP(0x4d) BAD_TRAP(0x4e) BAD_TRAP(0x4f) BAD_TRAP(0x50)
146 t_bad51:BAD_TRAP(0x51) BAD_TRAP(0x52) BAD_TRAP(0x53) BAD_TRAP(0x54) BAD_TRAP(0x55)
147 t_bad56:BAD_TRAP(0x56) BAD_TRAP(0x57) BAD_TRAP(0x58) BAD_TRAP(0x59) BAD_TRAP(0x5a)
148 t_bad5b:BAD_TRAP(0x5b) BAD_TRAP(0x5c) BAD_TRAP(0x5d) BAD_TRAP(0x5e) BAD_TRAP(0x5f)
149 t_bad60:BAD_TRAP(0x60) BAD_TRAP(0x61) BAD_TRAP(0x62) BAD_TRAP(0x63) BAD_TRAP(0x64)
150 t_bad65:BAD_TRAP(0x65) BAD_TRAP(0x66) BAD_TRAP(0x67) BAD_TRAP(0x68) BAD_TRAP(0x69)
151 t_bad6a:BAD_TRAP(0x6a) BAD_TRAP(0x6b) BAD_TRAP(0x6c) BAD_TRAP(0x6d) BAD_TRAP(0x6e)
152 t_bad6f:BAD_TRAP(0x6f) BAD_TRAP(0x70) BAD_TRAP(0x71) BAD_TRAP(0x72) BAD_TRAP(0x73)
153 t_bad74:BAD_TRAP(0x74) BAD_TRAP(0x75) BAD_TRAP(0x76) BAD_TRAP(0x77) BAD_TRAP(0x78)
154 t_bad79:BAD_TRAP(0x79) BAD_TRAP(0x7a) BAD_TRAP(0x7b) BAD_TRAP(0x7c) BAD_TRAP(0x7d)
155 t_bad7e:BAD_TRAP(0x7e) BAD_TRAP(0x7f)
156 t_bad80:BAD_TRAP(0x80) /* SunOS System Call */
157 t_sbkpt:BREAKPOINT_TRAP /* Software Breakpoint/KGDB */
158 t_divz: TRAP_ENTRY(0x82, do_hw_divzero) /* Divide by zero trap */
159 t_flwin:TRAP_ENTRY(0x83, do_flush_windows) /* Flush Windows Trap */
160 t_clwin:BAD_TRAP(0x84) /* Clean Windows Trap */
161 t_rchk: BAD_TRAP(0x85) /* Range Check */
162 t_funal:BAD_TRAP(0x86) /* Fix Unaligned Access Trap */
163 t_iovf: BAD_TRAP(0x87) /* Integer Overflow Trap */
164 t_bad88:BAD_TRAP(0x88) /* Slowaris System Call */
165 t_bad89:BAD_TRAP(0x89) /* Net-B.S. System Call */
166 t_bad8a:BAD_TRAP(0x8a) BAD_TRAP(0x8b) BAD_TRAP(0x8c) BAD_TRAP(0x8d) BAD_TRAP(0x8e)
167 t_bad8f:BAD_TRAP(0x8f)
168 t_linux:LINUX_SYSCALL_TRAP /* Linux System Call */
169 t_bad91:BAD_TRAP(0x91) BAD_TRAP(0x92) BAD_TRAP(0x93) BAD_TRAP(0x94) BAD_TRAP(0x95)
170 t_bad96:BAD_TRAP(0x96) BAD_TRAP(0x97) BAD_TRAP(0x98) BAD_TRAP(0x99) BAD_TRAP(0x9a)
171 t_bad9b:BAD_TRAP(0x9b) BAD_TRAP(0x9c) BAD_TRAP(0x9d) BAD_TRAP(0x9e) BAD_TRAP(0x9f)
172 t_getcc:GETCC_TRAP /* Get Condition Codes */
173 t_setcc:SETCC_TRAP /* Set Condition Codes */
174 t_getpsr:GETPSR_TRAP /* Get PSR Register */
175 t_bada3:BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6)
176 t_bada7:BAD_TRAP(0xa7)
177 t_bada8:BAD_TRAP(0xa8) BAD_TRAP(0xa9) BAD_TRAP(0xaa) BAD_TRAP(0xab)
178 t_badac:BAD_TRAP(0xac) BAD_TRAP(0xad) BAD_TRAP(0xae) BAD_TRAP(0xaf) BAD_TRAP(0xb0)
179 t_badb1:BAD_TRAP(0xb1) BAD_TRAP(0xb2) BAD_TRAP(0xb3) BAD_TRAP(0xb4) BAD_TRAP(0xb5)
180 t_badb6:BAD_TRAP(0xb6) BAD_TRAP(0xb7) BAD_TRAP(0xb8) BAD_TRAP(0xb9) BAD_TRAP(0xba)
181 t_badbb:BAD_TRAP(0xbb) BAD_TRAP(0xbc) BAD_TRAP(0xbd) BAD_TRAP(0xbe) BAD_TRAP(0xbf)
182 t_badc0:BAD_TRAP(0xc0) BAD_TRAP(0xc1) BAD_TRAP(0xc2) BAD_TRAP(0xc3) BAD_TRAP(0xc4)
183 t_badc5:BAD_TRAP(0xc5) BAD_TRAP(0xc6) BAD_TRAP(0xc7) BAD_TRAP(0xc8) BAD_TRAP(0xc9)
184 t_badca:BAD_TRAP(0xca) BAD_TRAP(0xcb) BAD_TRAP(0xcc) BAD_TRAP(0xcd) BAD_TRAP(0xce)
185 t_badcf:BAD_TRAP(0xcf) BAD_TRAP(0xd0) BAD_TRAP(0xd1) BAD_TRAP(0xd2) BAD_TRAP(0xd3)
186 t_badd4:BAD_TRAP(0xd4) BAD_TRAP(0xd5) BAD_TRAP(0xd6) BAD_TRAP(0xd7) BAD_TRAP(0xd8)
187 t_badd9:BAD_TRAP(0xd9) BAD_TRAP(0xda) BAD_TRAP(0xdb) BAD_TRAP(0xdc) BAD_TRAP(0xdd)
188 t_badde:BAD_TRAP(0xde) BAD_TRAP(0xdf) BAD_TRAP(0xe0) BAD_TRAP(0xe1) BAD_TRAP(0xe2)
189 t_bade3:BAD_TRAP(0xe3) BAD_TRAP(0xe4) BAD_TRAP(0xe5) BAD_TRAP(0xe6) BAD_TRAP(0xe7)
190 t_bade8:BAD_TRAP(0xe8) BAD_TRAP(0xe9) BAD_TRAP(0xea) BAD_TRAP(0xeb) BAD_TRAP(0xec)
191 t_baded:BAD_TRAP(0xed) BAD_TRAP(0xee) BAD_TRAP(0xef) BAD_TRAP(0xf0) BAD_TRAP(0xf1)
192 t_badf2:BAD_TRAP(0xf2) BAD_TRAP(0xf3) BAD_TRAP(0xf4) BAD_TRAP(0xf5) BAD_TRAP(0xf6)
193 t_badf7:BAD_TRAP(0xf7) BAD_TRAP(0xf8) BAD_TRAP(0xf9) BAD_TRAP(0xfa) BAD_TRAP(0xfb)
194 t_badfc:BAD_TRAP(0xfc)
195 t_kgdb: KGDB_TRAP(0xfd)
196 dbtrap: BAD_TRAP(0xfe) /* Debugger/PROM breakpoint #1 */
197 dbtrap2:BAD_TRAP(0xff) /* Debugger/PROM breakpoint #2 */
198
199 .globl end_traptable
200 end_traptable:
201
202 #ifdef CONFIG_SMP
203 /* Trap tables for the other cpus. */
204 .globl trapbase_cpu1, trapbase_cpu2, trapbase_cpu3
205 trapbase_cpu1:
206 BAD_TRAP(0x0) SRMMU_TFAULT TRAP_ENTRY(0x2, bad_instruction)
207 TRAP_ENTRY(0x3, priv_instruction) TRAP_ENTRY(0x4, fpd_trap_handler)
208 WINDOW_SPILL WINDOW_FILL TRAP_ENTRY(0x7, mna_handler)
209 TRAP_ENTRY(0x8, fpe_trap_handler) SRMMU_DFAULT
210 TRAP_ENTRY(0xa, do_tag_overflow) TRAP_ENTRY(0xb, do_watchpoint)
211 BAD_TRAP(0xc) BAD_TRAP(0xd) BAD_TRAP(0xe) BAD_TRAP(0xf) BAD_TRAP(0x10)
212 TRAP_ENTRY_INTERRUPT(1) TRAP_ENTRY_INTERRUPT(2)
213 TRAP_ENTRY_INTERRUPT(3) TRAP_ENTRY_INTERRUPT(4)
214 TRAP_ENTRY_INTERRUPT(5) TRAP_ENTRY_INTERRUPT(6)
215 TRAP_ENTRY_INTERRUPT(7) TRAP_ENTRY_INTERRUPT(8)
216 TRAP_ENTRY_INTERRUPT(9) TRAP_ENTRY_INTERRUPT(10)
217 TRAP_ENTRY_INTERRUPT(11) TRAP_ENTRY_INTERRUPT(12)
218 TRAP_ENTRY_INTERRUPT(13) TRAP_ENTRY_INTERRUPT(14)
219 TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m)
220 TRAP_ENTRY(0x20, do_reg_access) BAD_TRAP(0x21) BAD_TRAP(0x22)
221 BAD_TRAP(0x23) TRAP_ENTRY(0x24, do_cp_disabled) SKIP_TRAP(0x25, unimp_flush)
222 BAD_TRAP(0x26) BAD_TRAP(0x27) TRAP_ENTRY(0x28, do_cp_exception)
223 SRMMU_DFAULT TRAP_ENTRY(0x2a, do_hw_divzero) BAD_TRAP(0x2b) BAD_TRAP(0x2c)
224 BAD_TRAP(0x2d) BAD_TRAP(0x2e) BAD_TRAP(0x2f) BAD_TRAP(0x30) BAD_TRAP(0x31)
225 BAD_TRAP(0x32) BAD_TRAP(0x33) BAD_TRAP(0x34) BAD_TRAP(0x35) BAD_TRAP(0x36)
226 BAD_TRAP(0x37) BAD_TRAP(0x38) BAD_TRAP(0x39) BAD_TRAP(0x3a) BAD_TRAP(0x3b)
227 BAD_TRAP(0x3c) BAD_TRAP(0x3d) BAD_TRAP(0x3e) BAD_TRAP(0x3f) BAD_TRAP(0x40)
228 BAD_TRAP(0x41) BAD_TRAP(0x42) BAD_TRAP(0x43) BAD_TRAP(0x44) BAD_TRAP(0x45)
229 BAD_TRAP(0x46) BAD_TRAP(0x47) BAD_TRAP(0x48) BAD_TRAP(0x49) BAD_TRAP(0x4a)
230 BAD_TRAP(0x4b) BAD_TRAP(0x4c) BAD_TRAP(0x4d) BAD_TRAP(0x4e) BAD_TRAP(0x4f)
231 BAD_TRAP(0x50)
232 BAD_TRAP(0x51) BAD_TRAP(0x52) BAD_TRAP(0x53) BAD_TRAP(0x54) BAD_TRAP(0x55)
233 BAD_TRAP(0x56) BAD_TRAP(0x57) BAD_TRAP(0x58) BAD_TRAP(0x59) BAD_TRAP(0x5a)
234 BAD_TRAP(0x5b) BAD_TRAP(0x5c) BAD_TRAP(0x5d) BAD_TRAP(0x5e) BAD_TRAP(0x5f)
235 BAD_TRAP(0x60) BAD_TRAP(0x61) BAD_TRAP(0x62) BAD_TRAP(0x63) BAD_TRAP(0x64)
236 BAD_TRAP(0x65) BAD_TRAP(0x66) BAD_TRAP(0x67) BAD_TRAP(0x68) BAD_TRAP(0x69)
237 BAD_TRAP(0x6a) BAD_TRAP(0x6b) BAD_TRAP(0x6c) BAD_TRAP(0x6d) BAD_TRAP(0x6e)
238 BAD_TRAP(0x6f) BAD_TRAP(0x70) BAD_TRAP(0x71) BAD_TRAP(0x72) BAD_TRAP(0x73)
239 BAD_TRAP(0x74) BAD_TRAP(0x75) BAD_TRAP(0x76) BAD_TRAP(0x77) BAD_TRAP(0x78)
240 BAD_TRAP(0x79) BAD_TRAP(0x7a) BAD_TRAP(0x7b) BAD_TRAP(0x7c) BAD_TRAP(0x7d)
241 BAD_TRAP(0x7e) BAD_TRAP(0x7f)
242 BAD_TRAP(0x80)
243 BREAKPOINT_TRAP
244 TRAP_ENTRY(0x82, do_hw_divzero)
245 TRAP_ENTRY(0x83, do_flush_windows) BAD_TRAP(0x84) BAD_TRAP(0x85)
246 BAD_TRAP(0x86) BAD_TRAP(0x87) BAD_TRAP(0x88)
247 BAD_TRAP(0x89) BAD_TRAP(0x8a) BAD_TRAP(0x8b) BAD_TRAP(0x8c)
248 BAD_TRAP(0x8d) BAD_TRAP(0x8e) BAD_TRAP(0x8f)
249 LINUX_SYSCALL_TRAP BAD_TRAP(0x91) BAD_TRAP(0x92) BAD_TRAP(0x93) BAD_TRAP(0x94)
250 BAD_TRAP(0x95) BAD_TRAP(0x96) BAD_TRAP(0x97) BAD_TRAP(0x98) BAD_TRAP(0x99)
251 BAD_TRAP(0x9a) BAD_TRAP(0x9b) BAD_TRAP(0x9c) BAD_TRAP(0x9d) BAD_TRAP(0x9e)
252 BAD_TRAP(0x9f) GETCC_TRAP SETCC_TRAP GETPSR_TRAP
253 BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6)
254 BAD_TRAP(0xa7) BAD_TRAP(0xa8) BAD_TRAP(0xa9) BAD_TRAP(0xaa) BAD_TRAP(0xab)
255 BAD_TRAP(0xac) BAD_TRAP(0xad) BAD_TRAP(0xae) BAD_TRAP(0xaf) BAD_TRAP(0xb0)
256 BAD_TRAP(0xb1) BAD_TRAP(0xb2) BAD_TRAP(0xb3) BAD_TRAP(0xb4) BAD_TRAP(0xb5)
257 BAD_TRAP(0xb6) BAD_TRAP(0xb7) BAD_TRAP(0xb8) BAD_TRAP(0xb9) BAD_TRAP(0xba)
258 BAD_TRAP(0xbb) BAD_TRAP(0xbc) BAD_TRAP(0xbd) BAD_TRAP(0xbe) BAD_TRAP(0xbf)
259 BAD_TRAP(0xc0) BAD_TRAP(0xc1) BAD_TRAP(0xc2) BAD_TRAP(0xc3) BAD_TRAP(0xc4)
260 BAD_TRAP(0xc5) BAD_TRAP(0xc6) BAD_TRAP(0xc7) BAD_TRAP(0xc8) BAD_TRAP(0xc9)
261 BAD_TRAP(0xca) BAD_TRAP(0xcb) BAD_TRAP(0xcc) BAD_TRAP(0xcd) BAD_TRAP(0xce)
262 BAD_TRAP(0xcf) BAD_TRAP(0xd0) BAD_TRAP(0xd1) BAD_TRAP(0xd2) BAD_TRAP(0xd3)
263 BAD_TRAP(0xd4) BAD_TRAP(0xd5) BAD_TRAP(0xd6) BAD_TRAP(0xd7) BAD_TRAP(0xd8)
264 BAD_TRAP(0xd9) BAD_TRAP(0xda) BAD_TRAP(0xdb) BAD_TRAP(0xdc) BAD_TRAP(0xdd)
265 BAD_TRAP(0xde) BAD_TRAP(0xdf) BAD_TRAP(0xe0) BAD_TRAP(0xe1) BAD_TRAP(0xe2)
266 BAD_TRAP(0xe3) BAD_TRAP(0xe4) BAD_TRAP(0xe5) BAD_TRAP(0xe6) BAD_TRAP(0xe7)
267 BAD_TRAP(0xe8) BAD_TRAP(0xe9) BAD_TRAP(0xea) BAD_TRAP(0xeb) BAD_TRAP(0xec)
268 BAD_TRAP(0xed) BAD_TRAP(0xee) BAD_TRAP(0xef) BAD_TRAP(0xf0) BAD_TRAP(0xf1)
269 BAD_TRAP(0xf2) BAD_TRAP(0xf3) BAD_TRAP(0xf4) BAD_TRAP(0xf5) BAD_TRAP(0xf6)
270 BAD_TRAP(0xf7) BAD_TRAP(0xf8) BAD_TRAP(0xf9) BAD_TRAP(0xfa) BAD_TRAP(0xfb)
271 BAD_TRAP(0xfc) KGDB_TRAP(0xfd) BAD_TRAP(0xfe) BAD_TRAP(0xff)
272
273 trapbase_cpu2:
274 BAD_TRAP(0x0) SRMMU_TFAULT TRAP_ENTRY(0x2, bad_instruction)
275 TRAP_ENTRY(0x3, priv_instruction) TRAP_ENTRY(0x4, fpd_trap_handler)
276 WINDOW_SPILL WINDOW_FILL TRAP_ENTRY(0x7, mna_handler)
277 TRAP_ENTRY(0x8, fpe_trap_handler) SRMMU_DFAULT
278 TRAP_ENTRY(0xa, do_tag_overflow) TRAP_ENTRY(0xb, do_watchpoint)
279 BAD_TRAP(0xc) BAD_TRAP(0xd) BAD_TRAP(0xe) BAD_TRAP(0xf) BAD_TRAP(0x10)
280 TRAP_ENTRY_INTERRUPT(1) TRAP_ENTRY_INTERRUPT(2)
281 TRAP_ENTRY_INTERRUPT(3) TRAP_ENTRY_INTERRUPT(4)
282 TRAP_ENTRY_INTERRUPT(5) TRAP_ENTRY_INTERRUPT(6)
283 TRAP_ENTRY_INTERRUPT(7) TRAP_ENTRY_INTERRUPT(8)
284 TRAP_ENTRY_INTERRUPT(9) TRAP_ENTRY_INTERRUPT(10)
285 TRAP_ENTRY_INTERRUPT(11) TRAP_ENTRY_INTERRUPT(12)
286 TRAP_ENTRY_INTERRUPT(13) TRAP_ENTRY_INTERRUPT(14)
287 TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m)
288 TRAP_ENTRY(0x20, do_reg_access) BAD_TRAP(0x21) BAD_TRAP(0x22)
289 BAD_TRAP(0x23) TRAP_ENTRY(0x24, do_cp_disabled) SKIP_TRAP(0x25, unimp_flush)
290 BAD_TRAP(0x26) BAD_TRAP(0x27) TRAP_ENTRY(0x28, do_cp_exception)
291 SRMMU_DFAULT TRAP_ENTRY(0x2a, do_hw_divzero) BAD_TRAP(0x2b) BAD_TRAP(0x2c)
292 BAD_TRAP(0x2d) BAD_TRAP(0x2e) BAD_TRAP(0x2f) BAD_TRAP(0x30) BAD_TRAP(0x31)
293 BAD_TRAP(0x32) BAD_TRAP(0x33) BAD_TRAP(0x34) BAD_TRAP(0x35) BAD_TRAP(0x36)
294 BAD_TRAP(0x37) BAD_TRAP(0x38) BAD_TRAP(0x39) BAD_TRAP(0x3a) BAD_TRAP(0x3b)
295 BAD_TRAP(0x3c) BAD_TRAP(0x3d) BAD_TRAP(0x3e) BAD_TRAP(0x3f) BAD_TRAP(0x40)
296 BAD_TRAP(0x41) BAD_TRAP(0x42) BAD_TRAP(0x43) BAD_TRAP(0x44) BAD_TRAP(0x45)
297 BAD_TRAP(0x46) BAD_TRAP(0x47) BAD_TRAP(0x48) BAD_TRAP(0x49) BAD_TRAP(0x4a)
298 BAD_TRAP(0x4b) BAD_TRAP(0x4c) BAD_TRAP(0x4d) BAD_TRAP(0x4e) BAD_TRAP(0x4f)
299 BAD_TRAP(0x50)
300 BAD_TRAP(0x51) BAD_TRAP(0x52) BAD_TRAP(0x53) BAD_TRAP(0x54) BAD_TRAP(0x55)
301 BAD_TRAP(0x56) BAD_TRAP(0x57) BAD_TRAP(0x58) BAD_TRAP(0x59) BAD_TRAP(0x5a)
302 BAD_TRAP(0x5b) BAD_TRAP(0x5c) BAD_TRAP(0x5d) BAD_TRAP(0x5e) BAD_TRAP(0x5f)
303 BAD_TRAP(0x60) BAD_TRAP(0x61) BAD_TRAP(0x62) BAD_TRAP(0x63) BAD_TRAP(0x64)
304 BAD_TRAP(0x65) BAD_TRAP(0x66) BAD_TRAP(0x67) BAD_TRAP(0x68) BAD_TRAP(0x69)
305 BAD_TRAP(0x6a) BAD_TRAP(0x6b) BAD_TRAP(0x6c) BAD_TRAP(0x6d) BAD_TRAP(0x6e)
306 BAD_TRAP(0x6f) BAD_TRAP(0x70) BAD_TRAP(0x71) BAD_TRAP(0x72) BAD_TRAP(0x73)
307 BAD_TRAP(0x74) BAD_TRAP(0x75) BAD_TRAP(0x76) BAD_TRAP(0x77) BAD_TRAP(0x78)
308 BAD_TRAP(0x79) BAD_TRAP(0x7a) BAD_TRAP(0x7b) BAD_TRAP(0x7c) BAD_TRAP(0x7d)
309 BAD_TRAP(0x7e) BAD_TRAP(0x7f)
310 BAD_TRAP(0x80)
311 BREAKPOINT_TRAP
312 TRAP_ENTRY(0x82, do_hw_divzero)
313 TRAP_ENTRY(0x83, do_flush_windows) BAD_TRAP(0x84) BAD_TRAP(0x85)
314 BAD_TRAP(0x86) BAD_TRAP(0x87) BAD_TRAP(0x88)
315 BAD_TRAP(0x89) BAD_TRAP(0x8a) BAD_TRAP(0x8b) BAD_TRAP(0x8c)
316 BAD_TRAP(0x8d) BAD_TRAP(0x8e) BAD_TRAP(0x8f)
317 LINUX_SYSCALL_TRAP BAD_TRAP(0x91) BAD_TRAP(0x92) BAD_TRAP(0x93) BAD_TRAP(0x94)
318 BAD_TRAP(0x95) BAD_TRAP(0x96) BAD_TRAP(0x97) BAD_TRAP(0x98) BAD_TRAP(0x99)
319 BAD_TRAP(0x9a) BAD_TRAP(0x9b) BAD_TRAP(0x9c) BAD_TRAP(0x9d) BAD_TRAP(0x9e)
320 BAD_TRAP(0x9f) GETCC_TRAP SETCC_TRAP GETPSR_TRAP
321 BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6)
322 BAD_TRAP(0xa7) BAD_TRAP(0xa8) BAD_TRAP(0xa9) BAD_TRAP(0xaa) BAD_TRAP(0xab)
323 BAD_TRAP(0xac) BAD_TRAP(0xad) BAD_TRAP(0xae) BAD_TRAP(0xaf) BAD_TRAP(0xb0)
324 BAD_TRAP(0xb1) BAD_TRAP(0xb2) BAD_TRAP(0xb3) BAD_TRAP(0xb4) BAD_TRAP(0xb5)
325 BAD_TRAP(0xb6) BAD_TRAP(0xb7) BAD_TRAP(0xb8) BAD_TRAP(0xb9) BAD_TRAP(0xba)
326 BAD_TRAP(0xbb) BAD_TRAP(0xbc) BAD_TRAP(0xbd) BAD_TRAP(0xbe) BAD_TRAP(0xbf)
327 BAD_TRAP(0xc0) BAD_TRAP(0xc1) BAD_TRAP(0xc2) BAD_TRAP(0xc3) BAD_TRAP(0xc4)
328 BAD_TRAP(0xc5) BAD_TRAP(0xc6) BAD_TRAP(0xc7) BAD_TRAP(0xc8) BAD_TRAP(0xc9)
329 BAD_TRAP(0xca) BAD_TRAP(0xcb) BAD_TRAP(0xcc) BAD_TRAP(0xcd) BAD_TRAP(0xce)
330 BAD_TRAP(0xcf) BAD_TRAP(0xd0) BAD_TRAP(0xd1) BAD_TRAP(0xd2) BAD_TRAP(0xd3)
331 BAD_TRAP(0xd4) BAD_TRAP(0xd5) BAD_TRAP(0xd6) BAD_TRAP(0xd7) BAD_TRAP(0xd8)
332 BAD_TRAP(0xd9) BAD_TRAP(0xda) BAD_TRAP(0xdb) BAD_TRAP(0xdc) BAD_TRAP(0xdd)
333 BAD_TRAP(0xde) BAD_TRAP(0xdf) BAD_TRAP(0xe0) BAD_TRAP(0xe1) BAD_TRAP(0xe2)
334 BAD_TRAP(0xe3) BAD_TRAP(0xe4) BAD_TRAP(0xe5) BAD_TRAP(0xe6) BAD_TRAP(0xe7)
335 BAD_TRAP(0xe8) BAD_TRAP(0xe9) BAD_TRAP(0xea) BAD_TRAP(0xeb) BAD_TRAP(0xec)
336 BAD_TRAP(0xed) BAD_TRAP(0xee) BAD_TRAP(0xef) BAD_TRAP(0xf0) BAD_TRAP(0xf1)
337 BAD_TRAP(0xf2) BAD_TRAP(0xf3) BAD_TRAP(0xf4) BAD_TRAP(0xf5) BAD_TRAP(0xf6)
338 BAD_TRAP(0xf7) BAD_TRAP(0xf8) BAD_TRAP(0xf9) BAD_TRAP(0xfa) BAD_TRAP(0xfb)
339 BAD_TRAP(0xfc) KGDB_TRAP(0xfd) BAD_TRAP(0xfe) BAD_TRAP(0xff)
340
341 trapbase_cpu3:
342 BAD_TRAP(0x0) SRMMU_TFAULT TRAP_ENTRY(0x2, bad_instruction)
343 TRAP_ENTRY(0x3, priv_instruction) TRAP_ENTRY(0x4, fpd_trap_handler)
344 WINDOW_SPILL WINDOW_FILL TRAP_ENTRY(0x7, mna_handler)
345 TRAP_ENTRY(0x8, fpe_trap_handler) SRMMU_DFAULT
346 TRAP_ENTRY(0xa, do_tag_overflow) TRAP_ENTRY(0xb, do_watchpoint)
347 BAD_TRAP(0xc) BAD_TRAP(0xd) BAD_TRAP(0xe) BAD_TRAP(0xf) BAD_TRAP(0x10)
348 TRAP_ENTRY_INTERRUPT(1) TRAP_ENTRY_INTERRUPT(2)
349 TRAP_ENTRY_INTERRUPT(3) TRAP_ENTRY_INTERRUPT(4)
350 TRAP_ENTRY_INTERRUPT(5) TRAP_ENTRY_INTERRUPT(6)
351 TRAP_ENTRY_INTERRUPT(7) TRAP_ENTRY_INTERRUPT(8)
352 TRAP_ENTRY_INTERRUPT(9) TRAP_ENTRY_INTERRUPT(10)
353 TRAP_ENTRY_INTERRUPT(11) TRAP_ENTRY_INTERRUPT(12)
354 TRAP_ENTRY_INTERRUPT(13) TRAP_ENTRY_INTERRUPT(14)
355 TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m)
356 TRAP_ENTRY(0x20, do_reg_access) BAD_TRAP(0x21) BAD_TRAP(0x22)
357 BAD_TRAP(0x23) TRAP_ENTRY(0x24, do_cp_disabled) SKIP_TRAP(0x25, unimp_flush)
358 BAD_TRAP(0x26) BAD_TRAP(0x27) TRAP_ENTRY(0x28, do_cp_exception)
359 SRMMU_DFAULT TRAP_ENTRY(0x2a, do_hw_divzero) BAD_TRAP(0x2b) BAD_TRAP(0x2c)
360 BAD_TRAP(0x2d) BAD_TRAP(0x2e) BAD_TRAP(0x2f) BAD_TRAP(0x30) BAD_TRAP(0x31)
361 BAD_TRAP(0x32) BAD_TRAP(0x33) BAD_TRAP(0x34) BAD_TRAP(0x35) BAD_TRAP(0x36)
362 BAD_TRAP(0x37) BAD_TRAP(0x38) BAD_TRAP(0x39) BAD_TRAP(0x3a) BAD_TRAP(0x3b)
363 BAD_TRAP(0x3c) BAD_TRAP(0x3d) BAD_TRAP(0x3e) BAD_TRAP(0x3f) BAD_TRAP(0x40)
364 BAD_TRAP(0x41) BAD_TRAP(0x42) BAD_TRAP(0x43) BAD_TRAP(0x44) BAD_TRAP(0x45)
365 BAD_TRAP(0x46) BAD_TRAP(0x47) BAD_TRAP(0x48) BAD_TRAP(0x49) BAD_TRAP(0x4a)
366 BAD_TRAP(0x4b) BAD_TRAP(0x4c) BAD_TRAP(0x4d) BAD_TRAP(0x4e) BAD_TRAP(0x4f)
367 BAD_TRAP(0x50)
368 BAD_TRAP(0x51) BAD_TRAP(0x52) BAD_TRAP(0x53) BAD_TRAP(0x54) BAD_TRAP(0x55)
369 BAD_TRAP(0x56) BAD_TRAP(0x57) BAD_TRAP(0x58) BAD_TRAP(0x59) BAD_TRAP(0x5a)
370 BAD_TRAP(0x5b) BAD_TRAP(0x5c) BAD_TRAP(0x5d) BAD_TRAP(0x5e) BAD_TRAP(0x5f)
371 BAD_TRAP(0x60) BAD_TRAP(0x61) BAD_TRAP(0x62) BAD_TRAP(0x63) BAD_TRAP(0x64)
372 BAD_TRAP(0x65) BAD_TRAP(0x66) BAD_TRAP(0x67) BAD_TRAP(0x68) BAD_TRAP(0x69)
373 BAD_TRAP(0x6a) BAD_TRAP(0x6b) BAD_TRAP(0x6c) BAD_TRAP(0x6d) BAD_TRAP(0x6e)
374 BAD_TRAP(0x6f) BAD_TRAP(0x70) BAD_TRAP(0x71) BAD_TRAP(0x72) BAD_TRAP(0x73)
375 BAD_TRAP(0x74) BAD_TRAP(0x75) BAD_TRAP(0x76) BAD_TRAP(0x77) BAD_TRAP(0x78)
376 BAD_TRAP(0x79) BAD_TRAP(0x7a) BAD_TRAP(0x7b) BAD_TRAP(0x7c) BAD_TRAP(0x7d)
377 BAD_TRAP(0x7e) BAD_TRAP(0x7f)
378 BAD_TRAP(0x80)
379 BREAKPOINT_TRAP
380 TRAP_ENTRY(0x82, do_hw_divzero)
381 TRAP_ENTRY(0x83, do_flush_windows) BAD_TRAP(0x84) BAD_TRAP(0x85)
382 BAD_TRAP(0x86) BAD_TRAP(0x87) BAD_TRAP(0x88)
383 BAD_TRAP(0x89) BAD_TRAP(0x8a) BAD_TRAP(0x8b) BAD_TRAP(0x8c)
384 BAD_TRAP(0x8d) BAD_TRAP(0x8e) BAD_TRAP(0x8f)
385 LINUX_SYSCALL_TRAP BAD_TRAP(0x91) BAD_TRAP(0x92) BAD_TRAP(0x93) BAD_TRAP(0x94)
386 BAD_TRAP(0x95) BAD_TRAP(0x96) BAD_TRAP(0x97) BAD_TRAP(0x98) BAD_TRAP(0x99)
387 BAD_TRAP(0x9a) BAD_TRAP(0x9b) BAD_TRAP(0x9c) BAD_TRAP(0x9d) BAD_TRAP(0x9e)
388 BAD_TRAP(0x9f) GETCC_TRAP SETCC_TRAP GETPSR_TRAP
389 BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6)
390 BAD_TRAP(0xa7) BAD_TRAP(0xa8) BAD_TRAP(0xa9) BAD_TRAP(0xaa) BAD_TRAP(0xab)
391 BAD_TRAP(0xac) BAD_TRAP(0xad) BAD_TRAP(0xae) BAD_TRAP(0xaf) BAD_TRAP(0xb0)
392 BAD_TRAP(0xb1) BAD_TRAP(0xb2) BAD_TRAP(0xb3) BAD_TRAP(0xb4) BAD_TRAP(0xb5)
393 BAD_TRAP(0xb6) BAD_TRAP(0xb7) BAD_TRAP(0xb8) BAD_TRAP(0xb9) BAD_TRAP(0xba)
394 BAD_TRAP(0xbb) BAD_TRAP(0xbc) BAD_TRAP(0xbd) BAD_TRAP(0xbe) BAD_TRAP(0xbf)
395 BAD_TRAP(0xc0) BAD_TRAP(0xc1) BAD_TRAP(0xc2) BAD_TRAP(0xc3) BAD_TRAP(0xc4)
396 BAD_TRAP(0xc5) BAD_TRAP(0xc6) BAD_TRAP(0xc7) BAD_TRAP(0xc8) BAD_TRAP(0xc9)
397 BAD_TRAP(0xca) BAD_TRAP(0xcb) BAD_TRAP(0xcc) BAD_TRAP(0xcd) BAD_TRAP(0xce)
398 BAD_TRAP(0xcf) BAD_TRAP(0xd0) BAD_TRAP(0xd1) BAD_TRAP(0xd2) BAD_TRAP(0xd3)
399 BAD_TRAP(0xd4) BAD_TRAP(0xd5) BAD_TRAP(0xd6) BAD_TRAP(0xd7) BAD_TRAP(0xd8)
400 BAD_TRAP(0xd9) BAD_TRAP(0xda) BAD_TRAP(0xdb) BAD_TRAP(0xdc) BAD_TRAP(0xdd)
401 BAD_TRAP(0xde) BAD_TRAP(0xdf) BAD_TRAP(0xe0) BAD_TRAP(0xe1) BAD_TRAP(0xe2)
402 BAD_TRAP(0xe3) BAD_TRAP(0xe4) BAD_TRAP(0xe5) BAD_TRAP(0xe6) BAD_TRAP(0xe7)
403 BAD_TRAP(0xe8) BAD_TRAP(0xe9) BAD_TRAP(0xea) BAD_TRAP(0xeb) BAD_TRAP(0xec)
404 BAD_TRAP(0xed) BAD_TRAP(0xee) BAD_TRAP(0xef) BAD_TRAP(0xf0) BAD_TRAP(0xf1)
405 BAD_TRAP(0xf2) BAD_TRAP(0xf3) BAD_TRAP(0xf4) BAD_TRAP(0xf5) BAD_TRAP(0xf6)
406 BAD_TRAP(0xf7) BAD_TRAP(0xf8) BAD_TRAP(0xf9) BAD_TRAP(0xfa) BAD_TRAP(0xfb)
407 BAD_TRAP(0xfc) KGDB_TRAP(0xfd) BAD_TRAP(0xfe) BAD_TRAP(0xff)
408
409 #endif
410 .align PAGE_SIZE
411
412 /* This was the only reasonable way I could think of to properly align
413 * these page-table data structures.
414 */
415 .globl pg0, pg1, pg2, pg3
416 .globl empty_bad_page
417 .globl empty_bad_page_table
418 .globl empty_zero_page
419 .globl swapper_pg_dir
420 swapper_pg_dir: .skip PAGE_SIZE
421 pg0: .skip PAGE_SIZE
422 pg1: .skip PAGE_SIZE
423 pg2: .skip PAGE_SIZE
424 pg3: .skip PAGE_SIZE
425 empty_bad_page: .skip PAGE_SIZE
426 empty_bad_page_table: .skip PAGE_SIZE
427 empty_zero_page: .skip PAGE_SIZE
428
429 .global root_flags
430 .global ram_flags
431 .global root_dev
432 .global sparc_ramdisk_image
433 .global sparc_ramdisk_size
434
435 /* This stuff has to be in sync with SILO and other potential boot loaders
436 * Fields should be kept upward compatible and whenever any change is made,
437 * HdrS version should be incremented.
438 */
439 .ascii "HdrS"
440 .word LINUX_VERSION_CODE
441 .half 0x0203 /* HdrS version */
442 root_flags:
443 .half 1
444 root_dev:
445 .half 0
446 ram_flags:
447 .half 0
448 sparc_ramdisk_image:
449 .word 0
450 sparc_ramdisk_size:
451 .word 0
452 .word reboot_command
453 .word 0, 0, 0
454 .word _end
455
456 /* Cool, here we go. Pick up the romvec pointer in %o0 and stash it in
457 * %g7 and at prom_vector_p. And also quickly check whether we are on
458 * a v0, v2, or v3 prom.
459 */
460 gokernel:
461 /* Ok, it's nice to know, as early as possible, if we
462 * are already mapped where we expect to be in virtual
463 * memory. The Solaris /boot elf format bootloader
464 * will peek into our elf header and load us where
465 * we want to be, otherwise we have to re-map.
466 *
467 * Some boot loaders don't place the jmp'rs address
468 * in %o7, so we do a pc-relative call to a local
469 * label, then see what %o7 has.
470 */
471
472 mov %o7, %g4 ! Save %o7
473
474 /* Jump to it, and pray... */
475 current_pc:
476 call 1f
477 nop
478
479 1:
480 mov %o7, %g3
481
482 tst %o0
483 be no_sun4u_here
484 mov %g4, %o7 /* Previous %o7. */
485
486 mov %o0, %l0 ! stash away romvec
487 mov %o0, %g7 ! put it here too
488 mov %o1, %l1 ! stash away debug_vec too
489
490 /* Ok, let's check out our run time program counter. */
491 set current_pc, %g5
492 cmp %g3, %g5
493 be already_mapped
494 nop
495
496 /* %l6 will hold the offset we have to subtract
497 * from absolute symbols in order to access areas
498 * in our own image. If already mapped this is
499 * just plain zero, else it is KERNBASE.
500 */
501 set KERNBASE, %l6
502 b copy_prom_lvl14
503 nop
504
505 already_mapped:
506 mov 0, %l6
507
508 /* Copy over the Prom's level 14 clock handler. */
509 copy_prom_lvl14:
510 #if 1
511 /* DJHR
512 * preserve our linked/calculated instructions
513 */
514 set lvl14_save, %g1
515 set t_irq14, %g3
516 sub %g1, %l6, %g1 ! translate to physical
517 sub %g3, %l6, %g3 ! translate to physical
518 ldd [%g3], %g4
519 std %g4, [%g1]
520 ldd [%g3+8], %g4
521 std %g4, [%g1+8]
522 #endif
523 rd %tbr, %g1
524 andn %g1, 0xfff, %g1 ! proms trap table base
525 or %g0, (0x1e<<4), %g2 ! offset to lvl14 intr
526 or %g1, %g2, %g2
527 set t_irq14, %g3
528 sub %g3, %l6, %g3
529 ldd [%g2], %g4
530 std %g4, [%g3]
531 ldd [%g2 + 0x8], %g4
532 std %g4, [%g3 + 0x8] ! Copy proms handler
533
534 /* Must determine whether we are on a sun4c MMU, SRMMU, or SUN4/400 MUTANT
535 * MMU so we can remap ourselves properly. DON'T TOUCH %l0 thru %l5 in these
536 * remapping routines, we need their values afterwards!
537 */
538 /* Now check whether we are already mapped, if we
539 * are we can skip all this garbage coming up.
540 */
541 copy_prom_done:
542 cmp %l6, 0
543 be go_to_highmem ! this will be a nop then
544 nop
545
546 set LOAD_ADDR, %g6
547 cmp %g7, %g6
548 bne remap_not_a_sun4 ! This is not a Sun4
549 nop
550
551 or %g0, 0x1, %g1
552 lduba [%g1] ASI_CONTROL, %g1 ! Only safe to try on Sun4.
553 subcc %g1, 0x24, %g0 ! Is this a mutant Sun4/400???
554 be sun4_mutant_remap ! Ugh, it is...
555 nop
556
557 b sun4_normal_remap ! regular sun4, 2 level mmu
558 nop
559
560 remap_not_a_sun4:
561 lda [%g0] ASI_M_MMUREGS, %g1 ! same as ASI_PTE on sun4c
562 and %g1, 0x1, %g1 ! Test SRMMU Enable bit ;-)
563 cmp %g1, 0x0
564 be sun4c_remap ! A sun4c MMU or normal Sun4
565 nop
566 srmmu_remap:
567 /* First, check for a viking (TI) module. */
568 set 0x40000000, %g2
569 rd %psr, %g3
570 and %g2, %g3, %g3
571 subcc %g3, 0x0, %g0
572 bz srmmu_nviking
573 nop
574
575 /* Figure out what kind of viking we are on.
576 * We need to know if we have to play with the
577 * AC bit and disable traps or not.
578 */
579
580 /* I've only seen MicroSparc's on SparcClassics with this
581 * bit set.
582 */
583 set 0x800, %g2
584 lda [%g0] ASI_M_MMUREGS, %g3 ! peek in the control reg
585 and %g2, %g3, %g3
586 subcc %g3, 0x0, %g0
587 bnz srmmu_nviking ! is in mbus mode
588 nop
589
590 rd %psr, %g3 ! DO NOT TOUCH %g3
591 andn %g3, PSR_ET, %g2
592 wr %g2, 0x0, %psr
593 WRITE_PAUSE
594
595 /* Get context table pointer, then convert to
596 * a physical address, which is 36 bits.
597 */
598 set AC_M_CTPR, %g4
599 lda [%g4] ASI_M_MMUREGS, %g4
600 sll %g4, 0x4, %g4 ! We use this below
601 ! DO NOT TOUCH %g4
602
603 /* Set the AC bit in the Viking's MMU control reg. */
604 lda [%g0] ASI_M_MMUREGS, %g5 ! DO NOT TOUCH %g5
605 set 0x8000, %g6 ! AC bit mask
606 or %g5, %g6, %g6 ! Or it in...
607 sta %g6, [%g0] ASI_M_MMUREGS ! Close your eyes...
608
609 /* Grrr, why does it seem like every other load/store
610 * on the sun4m is in some ASI space...
611 * Fine with me, let's get the pointer to the level 1
612 * page table directory and fetch its entry.
613 */
614 lda [%g4] ASI_M_BYPASS, %o1 ! This is a level 1 ptr
615 srl %o1, 0x4, %o1 ! Clear low 4 bits
616 sll %o1, 0x8, %o1 ! Make physical
617
618 /* Ok, pull in the PTD. */
619 lda [%o1] ASI_M_BYPASS, %o2 ! This is the 0x0 16MB pgd
620
621 /* Calculate to KERNBASE entry. */
622 add %o1, KERNBASE >> (SRMMU_PGDIR_SHIFT - 2), %o3
623
624 /* Poke the entry into the calculated address. */
625 sta %o2, [%o3] ASI_M_BYPASS
626
627 /* I don't get it Sun, if you engineered all these
628 * boot loaders and the PROM (thank you for the debugging
629 * features btw) why did you not have them load kernel
630 * images up in high address space, since this is necessary
631 * for ABI compliance anyways? Does this low-mapping provide
632 * enhanced interoperability?
633 *
634 * "The PROM is the computer."
635 */
636
637 /* Ok, restore the MMU control register we saved in %g5 */
638 sta %g5, [%g0] ASI_M_MMUREGS ! POW... ouch
639
640 /* Turn traps back on. We saved it in %g3 earlier. */
641 wr %g3, 0x0, %psr ! tick tock, tick tock
642
643 /* Now we burn precious CPU cycles due to bad engineering. */
644 WRITE_PAUSE
645
646 /* Wow, all that just to move a 32-bit value from one
647 * place to another... Jump to high memory.
648 */
649 b go_to_highmem
650 nop
651
652 /* This works on viking's in Mbus mode and all
653 * other MBUS modules. It is virtually the same as
654 * the above madness sans turning traps off and flipping
655 * the AC bit.
656 */
657 srmmu_nviking:
658 set AC_M_CTPR, %g1
659 lda [%g1] ASI_M_MMUREGS, %g1 ! get ctx table ptr
660 sll %g1, 0x4, %g1 ! make physical addr
661 lda [%g1] ASI_M_BYPASS, %g1 ! ptr to level 1 pg_table
662 srl %g1, 0x4, %g1
663 sll %g1, 0x8, %g1 ! make phys addr for l1 tbl
664
665 lda [%g1] ASI_M_BYPASS, %g2 ! get level1 entry for 0x0
666 add %g1, KERNBASE >> (SRMMU_PGDIR_SHIFT - 2), %g3
667 sta %g2, [%g3] ASI_M_BYPASS ! place at KERNBASE entry
668 b go_to_highmem
669 nop ! wheee....
670
671 /* This remaps the kernel on Sun4/4xx machines
672 * that have the Sun Mutant Three Level MMU.
673 * It's like a platypus, Sun didn't have the
674 * SRMMU in conception so they kludged the three
675 * level logic in the regular Sun4 MMU probably.
676 *
677 * Basically, you take each entry in the top level
678 * directory that maps the low 3MB starting at
679 * address zero and put the mapping in the KERNBASE
680 * slots. These top level pgd's are called regmaps.
681 */
682 sun4_mutant_remap:
683 or %g0, %g0, %g3 ! source base
684 sethi %hi(KERNBASE), %g4 ! destination base
685 or %g4, %lo(KERNBASE), %g4
686 sethi %hi(0x300000), %g5
687 or %g5, %lo(0x300000), %g5 ! upper bound 3MB
688 or %g0, 0x1, %l6
689 sll %l6, 24, %l6 ! Regmap mapping size
690 add %g3, 0x2, %g3 ! Base magic
691 add %g4, 0x2, %g4 ! Base magic
692
693 /* Main remapping loop on Sun4-Mutant-MMU.
694 * "I am not an animal..." -Famous Mutant Person
695 */
696 sun4_mutant_loop:
697 lduha [%g3] ASI_REGMAP, %g2 ! Get lower entry
698 stha %g2, [%g4] ASI_REGMAP ! Store in high entry
699 add %g4, %l6, %g4 ! Move up high memory ptr
700 subcc %g3, %g5, %g0 ! Reached our limit?
701 blu sun4_mutant_loop ! Nope, loop again
702 add %g3, %l6, %g3 ! delay, Move up low ptr
703 b go_to_highmem ! Jump to high memory.
704 nop
705
706 /* The following is for non-4/4xx sun4 MMU's. */
707 sun4_normal_remap:
708 mov 0, %g3 ! source base
709 set KERNBASE, %g4 ! destination base
710 set 0x300000, %g5 ! upper bound 3MB
711 mov 1, %l6
712 sll %l6, 18, %l6 ! sun4 mmu segmap size
713 sun4_normal_loop:
714 lduha [%g3] ASI_SEGMAP, %g6 ! load phys_seg
715 stha %g6, [%g4] ASI_SEGMAP ! stort new virt mapping
716 add %g3, %l6, %g3 ! increment source pointer
717 subcc %g3, %g5, %g0 ! reached limit?
718 blu sun4_normal_loop ! nope, loop again
719 add %g4, %l6, %g4 ! delay, increment dest ptr
720 b go_to_highmem
721 nop
722
723 /* The following works for Sun4c MMU's */
724 sun4c_remap:
725 mov 0, %g3 ! source base
726 set KERNBASE, %g4 ! destination base
727 set 0x300000, %g5 ! upper bound 3MB
728 mov 1, %l6
729 sll %l6, 18, %l6 ! sun4c mmu segmap size
730 sun4c_remap_loop:
731 lda [%g3] ASI_SEGMAP, %g6 ! load phys_seg
732 sta %g6, [%g4] ASI_SEGMAP ! store new virt mapping
733 add %g3, %l6, %g3 ! Increment source ptr
734 subcc %g3, %g5, %g0 ! Reached limit?
735 bl sun4c_remap_loop ! Nope, loop again
736 add %g4, %l6, %g4 ! delay, Increment dest ptr
737
738 /* Now do a non-relative jump so that PC is in high-memory */
739 go_to_highmem:
740 set execute_in_high_mem, %g1
741 jmpl %g1, %g0
742 nop
743
744 /* The code above should be at beginning and we have to take care about
745 * short jumps, as branching to .text.init section from .text is usually
746 * impossible */
747 __INIT
748 /* Acquire boot time privileged register values, this will help debugging.
749 * I figure out and store nwindows and nwindowsm1 later on.
750 */
751 execute_in_high_mem:
752 mov %l0, %o0 ! put back romvec
753 mov %l1, %o1 ! and debug_vec
754
755 sethi %hi(prom_vector_p), %g1
756 st %o0, [%g1 + %lo(prom_vector_p)]
757
758 sethi %hi(linux_dbvec), %g1
759 st %o1, [%g1 + %lo(linux_dbvec)]
760
761 ld [%o0 + 0x4], %o3
762 and %o3, 0x3, %o5 ! get the version
763
764 cmp %o3, 0x2 ! a v2 prom?
765 be found_version
766 nop
767
768 /* paul@sfe.com.au */
769 cmp %o3, 0x3 ! a v3 prom?
770 be found_version
771 nop
772
773 /* Old sun4's pass our load address into %o0 instead of the prom
774 * pointer. On sun4's you have to hard code the romvec pointer into
775 * your code. Sun probably still does that because they don't even
776 * trust their own "OpenBoot" specifications.
777 */
778 set LOAD_ADDR, %g6
779 cmp %o0, %g6 ! an old sun4?
780 be sun4_init
781 nop
782
783 found_version:
784 #ifdef CONFIG_SUN4
785 /* For people who try sun4 kernels, even if Configure.help advises them. */
786 ld [%g7 + 0x68], %o1
787 set sun4cdm_notsup, %o0
788 call %o1
789 nop
790 b halt_me
791 nop
792 #endif
793 /* Get the machine type via the mysterious romvec node operations. */
794
795 add %g7, 0x1c, %l1
796 ld [%l1], %l0
797 ld [%l0], %l0
798 call %l0
799 or %g0, %g0, %o0 ! next_node(0) = first_node
800 or %o0, %g0, %g6
801
802 sethi %hi(cputypvar), %o1 ! First node has cpu-arch
803 or %o1, %lo(cputypvar), %o1
804 sethi %hi(cputypval), %o2 ! information, the string
805 or %o2, %lo(cputypval), %o2
806 ld [%l1], %l0 ! 'compatibility' tells
807 ld [%l0 + 0xc], %l0 ! that we want 'sun4x' where
808 call %l0 ! x is one of '', 'c', 'm',
809 nop ! 'd' or 'e'. %o2 holds pointer
810 ! to a buf where above string
811 ! will get stored by the prom.
812
813 subcc %o0, %g0, %g0
814 bpos got_prop ! Got the property
815 nop
816
817 or %g6, %g0, %o0
818 sethi %hi(cputypvar_sun4m), %o1
819 or %o1, %lo(cputypvar_sun4m), %o1
820 sethi %hi(cputypval), %o2
821 or %o2, %lo(cputypval), %o2
822 ld [%l1], %l0
823 ld [%l0 + 0xc], %l0
824 call %l0
825 nop
826
827 got_prop:
828 set cputypval, %o2
829 ldub [%o2 + 0x4], %l1
830
831 cmp %l1, ' '
832 be 1f
833 cmp %l1, 'c'
834 be 1f
835 cmp %l1, 'm'
836 be 1f
837 cmp %l1, 's'
838 be 1f
839 cmp %l1, 'd'
840 be 1f
841 cmp %l1, 'e'
842 be no_sun4e_here ! Could be a sun4e.
843 nop
844 b no_sun4u_here ! AIEEE, a V9 sun4u... Get our BIG BROTHER kernel :))
845 nop
846
847 1: set cputypval, %l1
848 ldub [%l1 + 0x4], %l1
849 cmp %l1, 'm' ! Test for sun4d, sun4e ?
850 be sun4m_init
851 cmp %l1, 's' ! Treat sun4s as sun4m
852 be sun4m_init
853 cmp %l1, 'd' ! Let us see how the beast will die
854 be sun4d_init
855 nop
856
857 /* Jump into mmu context zero. */
858 set AC_CONTEXT, %g1
859 stba %g0, [%g1] ASI_CONTROL
860
861 b sun4c_continue_boot
862 nop
863
864 /* CPUID in bootbus can be found at PA 0xff0140000 */
865 #define SUN4D_BOOTBUS_CPUID 0xf0140000
866
867 sun4d_init:
868 /* Need to patch call to handler_irq */
869 set patch_handler_irq, %g4
870 set sun4d_handler_irq, %g5
871 sethi %hi(0x40000000), %g3 ! call
872 sub %g5, %g4, %g5
873 srl %g5, 2, %g5
874 or %g5, %g3, %g5
875 st %g5, [%g4]
876
877 #ifdef CONFIG_SMP
878 /* Get our CPU id out of bootbus */
879 set SUN4D_BOOTBUS_CPUID, %g3
880 lduba [%g3] ASI_M_CTL, %g3
881 and %g3, 0xf8, %g3
882 srl %g3, 3, %g4
883 sta %g4, [%g0] ASI_M_VIKING_TMP1
884 sethi %hi(boot_cpu_id), %g5
885 stb %g4, [%g5 + %lo(boot_cpu_id)]
886 sll %g4, 2, %g4
887 sethi %hi(boot_cpu_id4), %g5
888 stb %g4, [%g5 + %lo(boot_cpu_id4)]
889 #endif
890
891 /* Fall through to sun4m_init */
892
893 sun4m_init:
894 /* XXX Fucking Cypress... */
895 lda [%g0] ASI_M_MMUREGS, %g5
896 srl %g5, 28, %g4
897
898 cmp %g4, 1
899 bne 1f
900 srl %g5, 24, %g4
901
902 and %g4, 0xf, %g4
903 cmp %g4, 7 /* This would be a HyperSparc. */
904
905 bne 2f
906 nop
907
908 1:
909
910 #define PATCH_IT(dst, src) \
911 set (dst), %g5; \
912 set (src), %g4; \
913 ld [%g4], %g3; \
914 st %g3, [%g5]; \
915 ld [%g4+0x4], %g3; \
916 st %g3, [%g5+0x4];
917
918 /* Signed multiply. */
919 PATCH_IT(.mul, .mul_patch)
920 PATCH_IT(.mul+0x08, .mul_patch+0x08)
921
922 /* Signed remainder. */
923 PATCH_IT(.rem, .rem_patch)
924 PATCH_IT(.rem+0x08, .rem_patch+0x08)
925 PATCH_IT(.rem+0x10, .rem_patch+0x10)
926 PATCH_IT(.rem+0x18, .rem_patch+0x18)
927 PATCH_IT(.rem+0x20, .rem_patch+0x20)
928 PATCH_IT(.rem+0x28, .rem_patch+0x28)
929
930 /* Signed division. */
931 PATCH_IT(.div, .div_patch)
932 PATCH_IT(.div+0x08, .div_patch+0x08)
933 PATCH_IT(.div+0x10, .div_patch+0x10)
934 PATCH_IT(.div+0x18, .div_patch+0x18)
935 PATCH_IT(.div+0x20, .div_patch+0x20)
936
937 /* Unsigned multiply. */
938 PATCH_IT(.umul, .umul_patch)
939 PATCH_IT(.umul+0x08, .umul_patch+0x08)
940
941 /* Unsigned remainder. */
942 PATCH_IT(.urem, .urem_patch)
943 PATCH_IT(.urem+0x08, .urem_patch+0x08)
944 PATCH_IT(.urem+0x10, .urem_patch+0x10)
945 PATCH_IT(.urem+0x18, .urem_patch+0x18)
946
947 /* Unsigned division. */
948 PATCH_IT(.udiv, .udiv_patch)
949 PATCH_IT(.udiv+0x08, .udiv_patch+0x08)
950 PATCH_IT(.udiv+0x10, .udiv_patch+0x10)
951
952 #undef PATCH_IT
953
954 /* Ok, the PROM could have done funny things and apple cider could still
955 * be sitting in the fault status/address registers. Read them all to
956 * clear them so we don't get magic faults later on.
957 */
958 /* This sucks, apparently this makes Vikings call prom panic, will fix later */
959 2:
960 rd %psr, %o1
961 srl %o1, 28, %o1 ! Get a type of the CPU
962
963 subcc %o1, 4, %g0 ! TI: Viking or MicroSPARC
964 be sun4c_continue_boot
965 nop
966
967 set AC_M_SFSR, %o0
968 lda [%o0] ASI_M_MMUREGS, %g0
969 set AC_M_SFAR, %o0
970 lda [%o0] ASI_M_MMUREGS, %g0
971
972 /* Fujitsu MicroSPARC-II has no asynchronous flavors of FARs */
973 subcc %o1, 0, %g0
974 be sun4c_continue_boot
975 nop
976
977 set AC_M_AFSR, %o0
978 lda [%o0] ASI_M_MMUREGS, %g0
979 set AC_M_AFAR, %o0
980 lda [%o0] ASI_M_MMUREGS, %g0
981 nop
982
983
984 sun4c_continue_boot:
985
986
987 /* Aieee, now set PC and nPC, enable traps, give ourselves a stack and it's
988 * show-time!
989 */
990
991 sethi %hi(cputyp), %o0
992 st %g4, [%o0 + %lo(cputyp)]
993
994 /* Turn on Supervisor, EnableFloating, and all the PIL bits.
995 * Also puts us in register window zero with traps off.
996 */
997 set (PSR_PS | PSR_S | PSR_PIL | PSR_EF), %g2
998 wr %g2, 0x0, %psr
999 WRITE_PAUSE
1000
1001 /* I want a kernel stack NOW! */
1002 set init_thread_union, %g1
1003 set (THREAD_SIZE - STACKFRAME_SZ), %g2
1004 add %g1, %g2, %sp
1005 mov 0, %fp /* And for good luck */
1006
1007 /* Zero out our BSS section. */
1008 set __bss_start , %o0 ! First address of BSS
1009 set end , %o1 ! Last address of BSS
1010 add %o0, 0x1, %o0
1011 1:
1012 stb %g0, [%o0]
1013 subcc %o0, %o1, %g0
1014 bl 1b
1015 add %o0, 0x1, %o0
1016
1017 /* Initialize the uwinmask value for init task just in case.
1018 * But first make current_set[boot_cpu_id] point to something useful.
1019 */
1020 set init_thread_union, %g6
1021 set current_set, %g2
1022 #ifdef CONFIG_SMP
1023 sethi %hi(boot_cpu_id4), %g3
1024 ldub [%g3 + %lo(boot_cpu_id4)], %g3
1025 st %g6, [%g2]
1026 add %g2, %g3, %g2
1027 #endif
1028 st %g6, [%g2]
1029
1030 st %g0, [%g6 + TI_UWINMASK]
1031
1032 /* Compute NWINDOWS and stash it away. Now uses %wim trick explained
1033 * in the V8 manual. Ok, this method seems to work, Sparc is cool...
1034 * No, it doesn't work, have to play the save/readCWP/restore trick.
1035 */
1036
1037 wr %g0, 0x0, %wim ! so we do not get a trap
1038 WRITE_PAUSE
1039
1040 save
1041
1042 rd %psr, %g3
1043
1044 restore
1045
1046 and %g3, 0x1f, %g3
1047 add %g3, 0x1, %g3
1048
1049 mov 2, %g1
1050 wr %g1, 0x0, %wim ! make window 1 invalid
1051 WRITE_PAUSE
1052
1053 cmp %g3, 0x7
1054 bne 2f
1055 nop
1056
1057 /* Adjust our window handling routines to
1058 * do things correctly on 7 window Sparcs.
1059 */
1060
1061 #define PATCH_INSN(src, dest) \
1062 set src, %g5; \
1063 set dest, %g2; \
1064 ld [%g5], %g4; \
1065 st %g4, [%g2];
1066
1067 /* Patch for window spills... */
1068 PATCH_INSN(spnwin_patch1_7win, spnwin_patch1)
1069 PATCH_INSN(spnwin_patch2_7win, spnwin_patch2)
1070 PATCH_INSN(spnwin_patch3_7win, spnwin_patch3)
1071
1072 /* Patch for window fills... */
1073 PATCH_INSN(fnwin_patch1_7win, fnwin_patch1)
1074 PATCH_INSN(fnwin_patch2_7win, fnwin_patch2)
1075
1076 /* Patch for trap entry setup... */
1077 PATCH_INSN(tsetup_7win_patch1, tsetup_patch1)
1078 PATCH_INSN(tsetup_7win_patch2, tsetup_patch2)
1079 PATCH_INSN(tsetup_7win_patch3, tsetup_patch3)
1080 PATCH_INSN(tsetup_7win_patch4, tsetup_patch4)
1081 PATCH_INSN(tsetup_7win_patch5, tsetup_patch5)
1082 PATCH_INSN(tsetup_7win_patch6, tsetup_patch6)
1083
1084 /* Patch for returning from traps... */
1085 PATCH_INSN(rtrap_7win_patch1, rtrap_patch1)
1086 PATCH_INSN(rtrap_7win_patch2, rtrap_patch2)
1087 PATCH_INSN(rtrap_7win_patch3, rtrap_patch3)
1088 PATCH_INSN(rtrap_7win_patch4, rtrap_patch4)
1089 PATCH_INSN(rtrap_7win_patch5, rtrap_patch5)
1090
1091 /* Patch for killing user windows from the register file. */
1092 PATCH_INSN(kuw_patch1_7win, kuw_patch1)
1093
1094 /* Now patch the kernel window flush sequences.
1095 * This saves 2 traps on every switch and fork.
1096 */
1097 set 0x01000000, %g4
1098 set flush_patch_one, %g5
1099 st %g4, [%g5 + 0x18]
1100 st %g4, [%g5 + 0x1c]
1101 set flush_patch_two, %g5
1102 st %g4, [%g5 + 0x18]
1103 st %g4, [%g5 + 0x1c]
1104 set flush_patch_three, %g5
1105 st %g4, [%g5 + 0x18]
1106 st %g4, [%g5 + 0x1c]
1107 set flush_patch_four, %g5
1108 st %g4, [%g5 + 0x18]
1109 st %g4, [%g5 + 0x1c]
1110 set flush_patch_exception, %g5
1111 st %g4, [%g5 + 0x18]
1112 st %g4, [%g5 + 0x1c]
1113 set flush_patch_switch, %g5
1114 st %g4, [%g5 + 0x18]
1115 st %g4, [%g5 + 0x1c]
1116
1117 2:
1118 sethi %hi(nwindows), %g4
1119 st %g3, [%g4 + %lo(nwindows)] ! store final value
1120 sub %g3, 0x1, %g3
1121 sethi %hi(nwindowsm1), %g4
1122 st %g3, [%g4 + %lo(nwindowsm1)]
1123
1124 /* Here we go, start using Linux's trap table... */
1125 set trapbase, %g3
1126 wr %g3, 0x0, %tbr
1127 WRITE_PAUSE
1128
1129 /* Finally, turn on traps so that we can call c-code. */
1130 rd %psr, %g3
1131 wr %g3, 0x0, %psr
1132 WRITE_PAUSE
1133
1134 wr %g3, PSR_ET, %psr
1135 WRITE_PAUSE
1136
1137 /* First we call prom_init() to set up PROMLIB, then
1138 * off to start_kernel().
1139 */
1140
1141 sethi %hi(prom_vector_p), %g5
1142 ld [%g5 + %lo(prom_vector_p)], %o0
1143 call prom_init
1144 nop
1145
1146 call start_kernel
1147 nop
1148
1149 /* We should not get here. */
1150 call halt_me
1151 nop
1152
1153 sun4_init:
1154 #ifdef CONFIG_SUN4
1155 /* There, happy now Adrian? */
1156 set cputypval, %o2 ! Let everyone know we
1157 set ' ', %o0 ! are a "sun4 " architecture
1158 stb %o0, [%o2 + 0x4]
1159
1160 b got_prop
1161 nop
1162 #else
1163 sethi %hi(SUN4_PROM_VECTOR+0x84), %o1
1164 ld [%o1 + %lo(SUN4_PROM_VECTOR+0x84)], %o1
1165 set sun4_notsup, %o0
1166 call %o1 /* printf */
1167 nop
1168 sethi %hi(SUN4_PROM_VECTOR+0xc4), %o1
1169 ld [%o1 + %lo(SUN4_PROM_VECTOR+0xc4)], %o1
1170 call %o1 /* exittomon */
1171 nop
1172 1: ba 1b ! Cannot exit into KMON
1173 nop
1174 #endif
1175 no_sun4e_here:
1176 ld [%g7 + 0x68], %o1
1177 set sun4e_notsup, %o0
1178 call %o1
1179 nop
1180 b halt_me
1181 nop
1182
1183 __INITDATA
1184
1185 sun4u_1:
1186 .asciz "finddevice"
1187 .align 4
1188 sun4u_2:
1189 .asciz "/chosen"
1190 .align 4
1191 sun4u_3:
1192 .asciz "getprop"
1193 .align 4
1194 sun4u_4:
1195 .asciz "stdout"
1196 .align 4
1197 sun4u_5:
1198 .asciz "write"
1199 .align 4
1200 sun4u_6:
1201 .asciz "\n\rOn sun4u you have to use UltraLinux (64bit) kernel\n\rand not a 32bit sun4[cdem] version\n\r\n\r"
1202 sun4u_6e:
1203 .align 4
1204 sun4u_7:
1205 .asciz "exit"
1206 .align 8
1207 sun4u_a1:
1208 .word 0, sun4u_1, 0, 1, 0, 1, 0, sun4u_2, 0
1209 sun4u_r1:
1210 .word 0
1211 sun4u_a2:
1212 .word 0, sun4u_3, 0, 4, 0, 1, 0
1213 sun4u_i2:
1214 .word 0, 0, sun4u_4, 0, sun4u_1, 0, 8, 0
1215 sun4u_r2:
1216 .word 0
1217 sun4u_a3:
1218 .word 0, sun4u_5, 0, 3, 0, 1, 0
1219 sun4u_i3:
1220 .word 0, 0, sun4u_6, 0, sun4u_6e - sun4u_6 - 1, 0
1221 sun4u_r3:
1222 .word 0
1223 sun4u_a4:
1224 .word 0, sun4u_7, 0, 0, 0, 0
1225 sun4u_r4:
1226
1227 __INIT
1228 no_sun4u_here:
1229 set sun4u_a1, %o0
1230 set current_pc, %l2
1231 cmp %l2, %g3
1232 be 1f
1233 mov %o4, %l0
1234 sub %g3, %l2, %l6
1235 add %o0, %l6, %o0
1236 mov %o0, %l4
1237 mov sun4u_r4 - sun4u_a1, %l3
1238 ld [%l4], %l5
1239 2:
1240 add %l4, 4, %l4
1241 cmp %l5, %l2
1242 add %l5, %l6, %l5
1243 bgeu,a 3f
1244 st %l5, [%l4 - 4]
1245 3:
1246 subcc %l3, 4, %l3
1247 bne 2b
1248 ld [%l4], %l5
1249 1:
1250 call %l0
1251 mov %o0, %l1
1252
1253 ld [%l1 + (sun4u_r1 - sun4u_a1)], %o1
1254 add %l1, (sun4u_a2 - sun4u_a1), %o0
1255 call %l0
1256 st %o1, [%o0 + (sun4u_i2 - sun4u_a2)]
1257
1258 ld [%l1 + (sun4u_1 - sun4u_a1)], %o1
1259 add %l1, (sun4u_a3 - sun4u_a1), %o0
1260 call %l0
1261 st %o1, [%o0 + (sun4u_i3 - sun4u_a3)]
1262
1263 call %l0
1264 add %l1, (sun4u_a4 - sun4u_a1), %o0
1265
1266 /* Not reached */
1267 halt_me:
1268 ld [%g7 + 0x74], %o0
1269 call %o0 ! Get us out of here...
1270 nop ! Apparently Solaris is better.
1271
1272 /* Ok, now we continue in the .data/.text sections */
1273
1274 .data
1275 .align 4
1276
1277 /*
1278 * Fill up the prom vector, note in particular the kind first element,
1279 * no joke. I don't need all of them in here as the entire prom vector
1280 * gets initialized in c-code so all routines can use it.
1281 */
1282
1283 .globl prom_vector_p
1284 prom_vector_p:
1285 .word 0
1286
1287 /* We calculate the following at boot time, window fills/spills and trap entry
1288 * code uses these to keep track of the register windows.
1289 */
1290
1291 .align 4
1292 .globl nwindows
1293 .globl nwindowsm1
1294 nwindows:
1295 .word 8
1296 nwindowsm1:
1297 .word 7
1298
1299 /* Boot time debugger vector value. We need this later on. */
1300
1301 .align 4
1302 .globl linux_dbvec
1303 linux_dbvec:
1304 .word 0
1305 .word 0
1306
1307 .align 8
1308
1309 .globl lvl14_save
1310 lvl14_save:
1311 .word 0
1312 .word 0
1313 .word 0
1314 .word 0
1315 .word t_irq14
1316
1317 .section ".fixup",#alloc,#execinstr
1318 .globl __ret_efault
1319 __ret_efault:
1320 ret
1321 restore %g0, -EFAULT, %o0
Linux kernel - Deliverables
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