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