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sparc32,leon: operate on boot-cpu IRQ controller registers
[deliverable/linux.git] / arch / sparc / kernel / head_32.S
CommitLineData
88278ca2 1/*
1da177e4
LT		 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>
1da177e4
LT		 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>
19fce2b9 22#include <asm/kdebug.h>
1da177e4
LT		 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
1da177e4
LT		 35cputyp:
36 .word 1
37
38 .align 4
39 .globl cputypval
40cputypval:
41 .asciz "sun4c"
42 .ascii " "
43
44cputypvalend:
45cputypvallen = 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 */
56cputypvar:
57 .asciz "compatability"
58
59/* Tested on SS-5, SS-10. Probably someone at Sun applied a spell-checker. */
60 .align 4
61cputypvar_sun4m:
62 .asciz "compatible"
63
64 .align 4
65
1da177e4 66sun4_notsup:
5110bd21 67 .asciz "Sparc-Linux sun4 support does no longer exist.\n\n"
1da177e4 68 .align 4
1da177e4
LT		 69
70sun4e_notsup:
71 .asciz "Sparc-Linux sun4e support does not exist\n\n"
72 .align 4
73
1da177e4 74 /* The Sparc trap table, bootloader gives us control at _start. */
ce8a7424 75 __HEAD
b2a39b0d 76 .globl _stext, _start, __stext
1da177e4
LT		 77 .globl trapbase
78_start: /* danger danger */
79__stext:
80_stext:
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LT		 81trapbase:
82#ifdef CONFIG_SMP
83trapbase_cpu0:
84#endif
85/* We get control passed to us here at t_zero. */
86t_zero: b gokernel; nop; nop; nop;
87t_tflt: SPARC_TFAULT /* Inst. Access Exception */
88t_bins: TRAP_ENTRY(0x2, bad_instruction) /* Illegal Instruction */
89t_pins: TRAP_ENTRY(0x3, priv_instruction) /* Privileged Instruction */
90t_fpd: TRAP_ENTRY(0x4, fpd_trap_handler) /* Floating Point Disabled */
91t_wovf: WINDOW_SPILL /* Window Overflow */
92t_wunf: WINDOW_FILL /* Window Underflow */
93t_mna: TRAP_ENTRY(0x7, mna_handler) /* Memory Address Not Aligned */
94t_fpe: TRAP_ENTRY(0x8, fpe_trap_handler) /* Floating Point Exception */
95t_dflt: SPARC_DFAULT /* Data Miss Exception */
96t_tio: TRAP_ENTRY(0xa, do_tag_overflow) /* Tagged Instruction Ovrflw */
97t_wpt: TRAP_ENTRY(0xb, do_watchpoint) /* Watchpoint Detected */
98t_badc: BAD_TRAP(0xc) BAD_TRAP(0xd) BAD_TRAP(0xe) BAD_TRAP(0xf) BAD_TRAP(0x10)
99t_irq1: TRAP_ENTRY_INTERRUPT(1) /* IRQ Software/SBUS Level 1 */
100t_irq2: TRAP_ENTRY_INTERRUPT(2) /* IRQ SBUS Level 2 */
101t_irq3: TRAP_ENTRY_INTERRUPT(3) /* IRQ SCSI/DMA/SBUS Level 3 */
102t_irq4: TRAP_ENTRY_INTERRUPT(4) /* IRQ Software Level 4 */
103t_irq5: TRAP_ENTRY_INTERRUPT(5) /* IRQ SBUS/Ethernet Level 5 */
104t_irq6: TRAP_ENTRY_INTERRUPT(6) /* IRQ Software Level 6 */
105t_irq7: TRAP_ENTRY_INTERRUPT(7) /* IRQ Video/SBUS Level 5 */
106t_irq8: TRAP_ENTRY_INTERRUPT(8) /* IRQ SBUS Level 6 */
107t_irq9: TRAP_ENTRY_INTERRUPT(9) /* IRQ SBUS Level 7 */
108t_irq10:TRAP_ENTRY_INTERRUPT(10) /* IRQ Timer #1 (one we use) */
109t_irq11:TRAP_ENTRY_INTERRUPT(11) /* IRQ Floppy Intr. */
110t_irq12:TRAP_ENTRY_INTERRUPT(12) /* IRQ Zilog serial chip */
111t_irq13:TRAP_ENTRY_INTERRUPT(13) /* IRQ Audio Intr. */
112t_irq14:TRAP_ENTRY_INTERRUPT(14) /* IRQ Timer #2 */
113 .globl t_nmi
114#ifndef CONFIG_SMP
115t_nmi: NMI_TRAP /* Level 15 (NMI) */
116#else
117t_nmi: TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m)
118#endif
119t_racc: TRAP_ENTRY(0x20, do_reg_access) /* General Register Access Error */
120t_iacce:BAD_TRAP(0x21) /* Instr Access Error */
121t_bad22:BAD_TRAP(0x22) BAD_TRAP(0x23)
122t_cpdis:TRAP_ENTRY(0x24, do_cp_disabled) /* Co-Processor Disabled */
123t_uflsh:SKIP_TRAP(0x25, unimp_flush) /* Unimplemented FLUSH inst. */
124t_bad26:BAD_TRAP(0x26) BAD_TRAP(0x27)
125t_cpexc:TRAP_ENTRY(0x28, do_cp_exception) /* Co-Processor Exception */
126t_dacce:SPARC_DFAULT /* Data Access Error */
127t_hwdz: TRAP_ENTRY(0x2a, do_hw_divzero) /* Division by zero, you lose... */
128t_dserr:BAD_TRAP(0x2b) /* Data Store Error */
129t_daccm:BAD_TRAP(0x2c) /* Data Access MMU-Miss */
130t_bad2d:BAD_TRAP(0x2d) BAD_TRAP(0x2e) BAD_TRAP(0x2f) BAD_TRAP(0x30) BAD_TRAP(0x31)
131t_bad32:BAD_TRAP(0x32) BAD_TRAP(0x33) BAD_TRAP(0x34) BAD_TRAP(0x35) BAD_TRAP(0x36)
132t_bad37:BAD_TRAP(0x37) BAD_TRAP(0x38) BAD_TRAP(0x39) BAD_TRAP(0x3a) BAD_TRAP(0x3b)
133t_iaccm:BAD_TRAP(0x3c) /* Instr Access MMU-Miss */
134t_bad3d:BAD_TRAP(0x3d) BAD_TRAP(0x3e) BAD_TRAP(0x3f) BAD_TRAP(0x40) BAD_TRAP(0x41)
135t_bad42:BAD_TRAP(0x42) BAD_TRAP(0x43) BAD_TRAP(0x44) BAD_TRAP(0x45) BAD_TRAP(0x46)
136t_bad47:BAD_TRAP(0x47) BAD_TRAP(0x48) BAD_TRAP(0x49) BAD_TRAP(0x4a) BAD_TRAP(0x4b)
137t_bad4c:BAD_TRAP(0x4c) BAD_TRAP(0x4d) BAD_TRAP(0x4e) BAD_TRAP(0x4f) BAD_TRAP(0x50)
138t_bad51:BAD_TRAP(0x51) BAD_TRAP(0x52) BAD_TRAP(0x53) BAD_TRAP(0x54) BAD_TRAP(0x55)
139t_bad56:BAD_TRAP(0x56) BAD_TRAP(0x57) BAD_TRAP(0x58) BAD_TRAP(0x59) BAD_TRAP(0x5a)
140t_bad5b:BAD_TRAP(0x5b) BAD_TRAP(0x5c) BAD_TRAP(0x5d) BAD_TRAP(0x5e) BAD_TRAP(0x5f)
141t_bad60:BAD_TRAP(0x60) BAD_TRAP(0x61) BAD_TRAP(0x62) BAD_TRAP(0x63) BAD_TRAP(0x64)
142t_bad65:BAD_TRAP(0x65) BAD_TRAP(0x66) BAD_TRAP(0x67) BAD_TRAP(0x68) BAD_TRAP(0x69)
143t_bad6a:BAD_TRAP(0x6a) BAD_TRAP(0x6b) BAD_TRAP(0x6c) BAD_TRAP(0x6d) BAD_TRAP(0x6e)
144t_bad6f:BAD_TRAP(0x6f) BAD_TRAP(0x70) BAD_TRAP(0x71) BAD_TRAP(0x72) BAD_TRAP(0x73)
145t_bad74:BAD_TRAP(0x74) BAD_TRAP(0x75) BAD_TRAP(0x76) BAD_TRAP(0x77) BAD_TRAP(0x78)
146t_bad79:BAD_TRAP(0x79) BAD_TRAP(0x7a) BAD_TRAP(0x7b) BAD_TRAP(0x7c) BAD_TRAP(0x7d)
147t_bad7e:BAD_TRAP(0x7e) BAD_TRAP(0x7f)
ec98c6b9 148t_bad80:BAD_TRAP(0x80) /* SunOS System Call */
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LT		 149t_sbkpt:BREAKPOINT_TRAP /* Software Breakpoint/KGDB */
150t_divz: TRAP_ENTRY(0x82, do_hw_divzero) /* Divide by zero trap */
151t_flwin:TRAP_ENTRY(0x83, do_flush_windows) /* Flush Windows Trap */
152t_clwin:BAD_TRAP(0x84) /* Clean Windows Trap */
153t_rchk: BAD_TRAP(0x85) /* Range Check */
154t_funal:BAD_TRAP(0x86) /* Fix Unaligned Access Trap */
155t_iovf: BAD_TRAP(0x87) /* Integer Overflow Trap */
ec98c6b9
DM		 156t_bad88:BAD_TRAP(0x88) /* Slowaris System Call */
157t_bad89:BAD_TRAP(0x89) /* Net-B.S. System Call */
1da177e4
LT		 158t_bad8a:BAD_TRAP(0x8a) BAD_TRAP(0x8b) BAD_TRAP(0x8c) BAD_TRAP(0x8d) BAD_TRAP(0x8e)
159t_bad8f:BAD_TRAP(0x8f)
160t_linux:LINUX_SYSCALL_TRAP /* Linux System Call */
161t_bad91:BAD_TRAP(0x91) BAD_TRAP(0x92) BAD_TRAP(0x93) BAD_TRAP(0x94) BAD_TRAP(0x95)
162t_bad96:BAD_TRAP(0x96) BAD_TRAP(0x97) BAD_TRAP(0x98) BAD_TRAP(0x99) BAD_TRAP(0x9a)
163t_bad9b:BAD_TRAP(0x9b) BAD_TRAP(0x9c) BAD_TRAP(0x9d) BAD_TRAP(0x9e) BAD_TRAP(0x9f)
164t_getcc:GETCC_TRAP /* Get Condition Codes */
165t_setcc:SETCC_TRAP /* Set Condition Codes */
166t_getpsr:GETPSR_TRAP /* Get PSR Register */
167t_bada3:BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6)
ec98c6b9 168t_bada7:BAD_TRAP(0xa7)
1da177e4
LT		 169t_bada8:BAD_TRAP(0xa8) BAD_TRAP(0xa9) BAD_TRAP(0xaa) BAD_TRAP(0xab)
170t_badac:BAD_TRAP(0xac) BAD_TRAP(0xad) BAD_TRAP(0xae) BAD_TRAP(0xaf) BAD_TRAP(0xb0)
171t_badb1:BAD_TRAP(0xb1) BAD_TRAP(0xb2) BAD_TRAP(0xb3) BAD_TRAP(0xb4) BAD_TRAP(0xb5)
172t_badb6:BAD_TRAP(0xb6) BAD_TRAP(0xb7) BAD_TRAP(0xb8) BAD_TRAP(0xb9) BAD_TRAP(0xba)
173t_badbb:BAD_TRAP(0xbb) BAD_TRAP(0xbc) BAD_TRAP(0xbd) BAD_TRAP(0xbe) BAD_TRAP(0xbf)
174t_badc0:BAD_TRAP(0xc0) BAD_TRAP(0xc1) BAD_TRAP(0xc2) BAD_TRAP(0xc3) BAD_TRAP(0xc4)
175t_badc5:BAD_TRAP(0xc5) BAD_TRAP(0xc6) BAD_TRAP(0xc7) BAD_TRAP(0xc8) BAD_TRAP(0xc9)
176t_badca:BAD_TRAP(0xca) BAD_TRAP(0xcb) BAD_TRAP(0xcc) BAD_TRAP(0xcd) BAD_TRAP(0xce)
177t_badcf:BAD_TRAP(0xcf) BAD_TRAP(0xd0) BAD_TRAP(0xd1) BAD_TRAP(0xd2) BAD_TRAP(0xd3)
178t_badd4:BAD_TRAP(0xd4) BAD_TRAP(0xd5) BAD_TRAP(0xd6) BAD_TRAP(0xd7) BAD_TRAP(0xd8)
179t_badd9:BAD_TRAP(0xd9) BAD_TRAP(0xda) BAD_TRAP(0xdb) BAD_TRAP(0xdc) BAD_TRAP(0xdd)
180t_badde:BAD_TRAP(0xde) BAD_TRAP(0xdf) BAD_TRAP(0xe0) BAD_TRAP(0xe1) BAD_TRAP(0xe2)
181t_bade3:BAD_TRAP(0xe3) BAD_TRAP(0xe4) BAD_TRAP(0xe5) BAD_TRAP(0xe6) BAD_TRAP(0xe7)
182t_bade8:BAD_TRAP(0xe8) BAD_TRAP(0xe9) BAD_TRAP(0xea) BAD_TRAP(0xeb) BAD_TRAP(0xec)
183t_baded:BAD_TRAP(0xed) BAD_TRAP(0xee) BAD_TRAP(0xef) BAD_TRAP(0xf0) BAD_TRAP(0xf1)
184t_badf2:BAD_TRAP(0xf2) BAD_TRAP(0xf3) BAD_TRAP(0xf4) BAD_TRAP(0xf5) BAD_TRAP(0xf6)
185t_badf7:BAD_TRAP(0xf7) BAD_TRAP(0xf8) BAD_TRAP(0xf9) BAD_TRAP(0xfa) BAD_TRAP(0xfb)
e2fdd7fd
DM		 186t_badfc:BAD_TRAP(0xfc)
187t_kgdb: KGDB_TRAP(0xfd)
1da177e4
LT		 188dbtrap: BAD_TRAP(0xfe) /* Debugger/PROM breakpoint #1 */
189dbtrap2:BAD_TRAP(0xff) /* Debugger/PROM breakpoint #2 */
190
191 .globl end_traptable
192end_traptable:
193
194#ifdef CONFIG_SMP
195 /* Trap tables for the other cpus. */
196 .globl trapbase_cpu1, trapbase_cpu2, trapbase_cpu3
197trapbase_cpu1:
198 BAD_TRAP(0x0) SRMMU_TFAULT TRAP_ENTRY(0x2, bad_instruction)
199 TRAP_ENTRY(0x3, priv_instruction) TRAP_ENTRY(0x4, fpd_trap_handler)
200 WINDOW_SPILL WINDOW_FILL TRAP_ENTRY(0x7, mna_handler)
201 TRAP_ENTRY(0x8, fpe_trap_handler) SRMMU_DFAULT
202 TRAP_ENTRY(0xa, do_tag_overflow) TRAP_ENTRY(0xb, do_watchpoint)
203 BAD_TRAP(0xc) BAD_TRAP(0xd) BAD_TRAP(0xe) BAD_TRAP(0xf) BAD_TRAP(0x10)
204 TRAP_ENTRY_INTERRUPT(1) TRAP_ENTRY_INTERRUPT(2)
205 TRAP_ENTRY_INTERRUPT(3) TRAP_ENTRY_INTERRUPT(4)
206 TRAP_ENTRY_INTERRUPT(5) TRAP_ENTRY_INTERRUPT(6)
207 TRAP_ENTRY_INTERRUPT(7) TRAP_ENTRY_INTERRUPT(8)
208 TRAP_ENTRY_INTERRUPT(9) TRAP_ENTRY_INTERRUPT(10)
209 TRAP_ENTRY_INTERRUPT(11) TRAP_ENTRY_INTERRUPT(12)
210 TRAP_ENTRY_INTERRUPT(13) TRAP_ENTRY_INTERRUPT(14)
211 TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m)
212 TRAP_ENTRY(0x20, do_reg_access) BAD_TRAP(0x21) BAD_TRAP(0x22)
213 BAD_TRAP(0x23) TRAP_ENTRY(0x24, do_cp_disabled) SKIP_TRAP(0x25, unimp_flush)
214 BAD_TRAP(0x26) BAD_TRAP(0x27) TRAP_ENTRY(0x28, do_cp_exception)
215 SRMMU_DFAULT TRAP_ENTRY(0x2a, do_hw_divzero) BAD_TRAP(0x2b) BAD_TRAP(0x2c)
216 BAD_TRAP(0x2d) BAD_TRAP(0x2e) BAD_TRAP(0x2f) BAD_TRAP(0x30) BAD_TRAP(0x31)
217 BAD_TRAP(0x32) BAD_TRAP(0x33) BAD_TRAP(0x34) BAD_TRAP(0x35) BAD_TRAP(0x36)
218 BAD_TRAP(0x37) BAD_TRAP(0x38) BAD_TRAP(0x39) BAD_TRAP(0x3a) BAD_TRAP(0x3b)
219 BAD_TRAP(0x3c) BAD_TRAP(0x3d) BAD_TRAP(0x3e) BAD_TRAP(0x3f) BAD_TRAP(0x40)
220 BAD_TRAP(0x41) BAD_TRAP(0x42) BAD_TRAP(0x43) BAD_TRAP(0x44) BAD_TRAP(0x45)
221 BAD_TRAP(0x46) BAD_TRAP(0x47) BAD_TRAP(0x48) BAD_TRAP(0x49) BAD_TRAP(0x4a)
222 BAD_TRAP(0x4b) BAD_TRAP(0x4c) BAD_TRAP(0x4d) BAD_TRAP(0x4e) BAD_TRAP(0x4f)
223 BAD_TRAP(0x50)
224 BAD_TRAP(0x51) BAD_TRAP(0x52) BAD_TRAP(0x53) BAD_TRAP(0x54) BAD_TRAP(0x55)
225 BAD_TRAP(0x56) BAD_TRAP(0x57) BAD_TRAP(0x58) BAD_TRAP(0x59) BAD_TRAP(0x5a)
226 BAD_TRAP(0x5b) BAD_TRAP(0x5c) BAD_TRAP(0x5d) BAD_TRAP(0x5e) BAD_TRAP(0x5f)
227 BAD_TRAP(0x60) BAD_TRAP(0x61) BAD_TRAP(0x62) BAD_TRAP(0x63) BAD_TRAP(0x64)
228 BAD_TRAP(0x65) BAD_TRAP(0x66) BAD_TRAP(0x67) BAD_TRAP(0x68) BAD_TRAP(0x69)
229 BAD_TRAP(0x6a) BAD_TRAP(0x6b) BAD_TRAP(0x6c) BAD_TRAP(0x6d) BAD_TRAP(0x6e)
230 BAD_TRAP(0x6f) BAD_TRAP(0x70) BAD_TRAP(0x71) BAD_TRAP(0x72) BAD_TRAP(0x73)
231 BAD_TRAP(0x74) BAD_TRAP(0x75) BAD_TRAP(0x76) BAD_TRAP(0x77) BAD_TRAP(0x78)
232 BAD_TRAP(0x79) BAD_TRAP(0x7a) BAD_TRAP(0x7b) BAD_TRAP(0x7c) BAD_TRAP(0x7d)
233 BAD_TRAP(0x7e) BAD_TRAP(0x7f)
ec98c6b9 234 BAD_TRAP(0x80)
1da177e4
LT		 235 BREAKPOINT_TRAP
236 TRAP_ENTRY(0x82, do_hw_divzero)
237 TRAP_ENTRY(0x83, do_flush_windows) BAD_TRAP(0x84) BAD_TRAP(0x85)
ec98c6b9
DM		 238 BAD_TRAP(0x86) BAD_TRAP(0x87) BAD_TRAP(0x88)
239 BAD_TRAP(0x89) BAD_TRAP(0x8a) BAD_TRAP(0x8b) BAD_TRAP(0x8c)
1da177e4
LT		 240 BAD_TRAP(0x8d) BAD_TRAP(0x8e) BAD_TRAP(0x8f)
241 LINUX_SYSCALL_TRAP BAD_TRAP(0x91) BAD_TRAP(0x92) BAD_TRAP(0x93) BAD_TRAP(0x94)
242 BAD_TRAP(0x95) BAD_TRAP(0x96) BAD_TRAP(0x97) BAD_TRAP(0x98) BAD_TRAP(0x99)
243 BAD_TRAP(0x9a) BAD_TRAP(0x9b) BAD_TRAP(0x9c) BAD_TRAP(0x9d) BAD_TRAP(0x9e)
244 BAD_TRAP(0x9f) GETCC_TRAP SETCC_TRAP GETPSR_TRAP
245 BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6)
ec98c6b9 246 BAD_TRAP(0xa7) BAD_TRAP(0xa8) BAD_TRAP(0xa9) BAD_TRAP(0xaa) BAD_TRAP(0xab)
1da177e4
LT		 247 BAD_TRAP(0xac) BAD_TRAP(0xad) BAD_TRAP(0xae) BAD_TRAP(0xaf) BAD_TRAP(0xb0)
248 BAD_TRAP(0xb1) BAD_TRAP(0xb2) BAD_TRAP(0xb3) BAD_TRAP(0xb4) BAD_TRAP(0xb5)
249 BAD_TRAP(0xb6) BAD_TRAP(0xb7) BAD_TRAP(0xb8) BAD_TRAP(0xb9) BAD_TRAP(0xba)
250 BAD_TRAP(0xbb) BAD_TRAP(0xbc) BAD_TRAP(0xbd) BAD_TRAP(0xbe) BAD_TRAP(0xbf)
251 BAD_TRAP(0xc0) BAD_TRAP(0xc1) BAD_TRAP(0xc2) BAD_TRAP(0xc3) BAD_TRAP(0xc4)
252 BAD_TRAP(0xc5) BAD_TRAP(0xc6) BAD_TRAP(0xc7) BAD_TRAP(0xc8) BAD_TRAP(0xc9)
253 BAD_TRAP(0xca) BAD_TRAP(0xcb) BAD_TRAP(0xcc) BAD_TRAP(0xcd) BAD_TRAP(0xce)
254 BAD_TRAP(0xcf) BAD_TRAP(0xd0) BAD_TRAP(0xd1) BAD_TRAP(0xd2) BAD_TRAP(0xd3)
255 BAD_TRAP(0xd4) BAD_TRAP(0xd5) BAD_TRAP(0xd6) BAD_TRAP(0xd7) BAD_TRAP(0xd8)
256 BAD_TRAP(0xd9) BAD_TRAP(0xda) BAD_TRAP(0xdb) BAD_TRAP(0xdc) BAD_TRAP(0xdd)
257 BAD_TRAP(0xde) BAD_TRAP(0xdf) BAD_TRAP(0xe0) BAD_TRAP(0xe1) BAD_TRAP(0xe2)
258 BAD_TRAP(0xe3) BAD_TRAP(0xe4) BAD_TRAP(0xe5) BAD_TRAP(0xe6) BAD_TRAP(0xe7)
259 BAD_TRAP(0xe8) BAD_TRAP(0xe9) BAD_TRAP(0xea) BAD_TRAP(0xeb) BAD_TRAP(0xec)
260 BAD_TRAP(0xed) BAD_TRAP(0xee) BAD_TRAP(0xef) BAD_TRAP(0xf0) BAD_TRAP(0xf1)
261 BAD_TRAP(0xf2) BAD_TRAP(0xf3) BAD_TRAP(0xf4) BAD_TRAP(0xf5) BAD_TRAP(0xf6)
262 BAD_TRAP(0xf7) BAD_TRAP(0xf8) BAD_TRAP(0xf9) BAD_TRAP(0xfa) BAD_TRAP(0xfb)
e2fdd7fd 263 BAD_TRAP(0xfc) KGDB_TRAP(0xfd) BAD_TRAP(0xfe) BAD_TRAP(0xff)
1da177e4
LT		 264
265trapbase_cpu2:
266 BAD_TRAP(0x0) SRMMU_TFAULT TRAP_ENTRY(0x2, bad_instruction)
267 TRAP_ENTRY(0x3, priv_instruction) TRAP_ENTRY(0x4, fpd_trap_handler)
268 WINDOW_SPILL WINDOW_FILL TRAP_ENTRY(0x7, mna_handler)
269 TRAP_ENTRY(0x8, fpe_trap_handler) SRMMU_DFAULT
270 TRAP_ENTRY(0xa, do_tag_overflow) TRAP_ENTRY(0xb, do_watchpoint)
271 BAD_TRAP(0xc) BAD_TRAP(0xd) BAD_TRAP(0xe) BAD_TRAP(0xf) BAD_TRAP(0x10)
272 TRAP_ENTRY_INTERRUPT(1) TRAP_ENTRY_INTERRUPT(2)
273 TRAP_ENTRY_INTERRUPT(3) TRAP_ENTRY_INTERRUPT(4)
274 TRAP_ENTRY_INTERRUPT(5) TRAP_ENTRY_INTERRUPT(6)
275 TRAP_ENTRY_INTERRUPT(7) TRAP_ENTRY_INTERRUPT(8)
276 TRAP_ENTRY_INTERRUPT(9) TRAP_ENTRY_INTERRUPT(10)
277 TRAP_ENTRY_INTERRUPT(11) TRAP_ENTRY_INTERRUPT(12)
278 TRAP_ENTRY_INTERRUPT(13) TRAP_ENTRY_INTERRUPT(14)
279 TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m)
280 TRAP_ENTRY(0x20, do_reg_access) BAD_TRAP(0x21) BAD_TRAP(0x22)
281 BAD_TRAP(0x23) TRAP_ENTRY(0x24, do_cp_disabled) SKIP_TRAP(0x25, unimp_flush)
282 BAD_TRAP(0x26) BAD_TRAP(0x27) TRAP_ENTRY(0x28, do_cp_exception)
283 SRMMU_DFAULT TRAP_ENTRY(0x2a, do_hw_divzero) BAD_TRAP(0x2b) BAD_TRAP(0x2c)
284 BAD_TRAP(0x2d) BAD_TRAP(0x2e) BAD_TRAP(0x2f) BAD_TRAP(0x30) BAD_TRAP(0x31)
285 BAD_TRAP(0x32) BAD_TRAP(0x33) BAD_TRAP(0x34) BAD_TRAP(0x35) BAD_TRAP(0x36)
286 BAD_TRAP(0x37) BAD_TRAP(0x38) BAD_TRAP(0x39) BAD_TRAP(0x3a) BAD_TRAP(0x3b)
287 BAD_TRAP(0x3c) BAD_TRAP(0x3d) BAD_TRAP(0x3e) BAD_TRAP(0x3f) BAD_TRAP(0x40)
288 BAD_TRAP(0x41) BAD_TRAP(0x42) BAD_TRAP(0x43) BAD_TRAP(0x44) BAD_TRAP(0x45)
289 BAD_TRAP(0x46) BAD_TRAP(0x47) BAD_TRAP(0x48) BAD_TRAP(0x49) BAD_TRAP(0x4a)
290 BAD_TRAP(0x4b) BAD_TRAP(0x4c) BAD_TRAP(0x4d) BAD_TRAP(0x4e) BAD_TRAP(0x4f)
291 BAD_TRAP(0x50)
292 BAD_TRAP(0x51) BAD_TRAP(0x52) BAD_TRAP(0x53) BAD_TRAP(0x54) BAD_TRAP(0x55)
293 BAD_TRAP(0x56) BAD_TRAP(0x57) BAD_TRAP(0x58) BAD_TRAP(0x59) BAD_TRAP(0x5a)
294 BAD_TRAP(0x5b) BAD_TRAP(0x5c) BAD_TRAP(0x5d) BAD_TRAP(0x5e) BAD_TRAP(0x5f)
295 BAD_TRAP(0x60) BAD_TRAP(0x61) BAD_TRAP(0x62) BAD_TRAP(0x63) BAD_TRAP(0x64)
296 BAD_TRAP(0x65) BAD_TRAP(0x66) BAD_TRAP(0x67) BAD_TRAP(0x68) BAD_TRAP(0x69)
297 BAD_TRAP(0x6a) BAD_TRAP(0x6b) BAD_TRAP(0x6c) BAD_TRAP(0x6d) BAD_TRAP(0x6e)
298 BAD_TRAP(0x6f) BAD_TRAP(0x70) BAD_TRAP(0x71) BAD_TRAP(0x72) BAD_TRAP(0x73)
299 BAD_TRAP(0x74) BAD_TRAP(0x75) BAD_TRAP(0x76) BAD_TRAP(0x77) BAD_TRAP(0x78)
300 BAD_TRAP(0x79) BAD_TRAP(0x7a) BAD_TRAP(0x7b) BAD_TRAP(0x7c) BAD_TRAP(0x7d)
301 BAD_TRAP(0x7e) BAD_TRAP(0x7f)
ec98c6b9 302 BAD_TRAP(0x80)
1da177e4
LT		 303 BREAKPOINT_TRAP
304 TRAP_ENTRY(0x82, do_hw_divzero)
305 TRAP_ENTRY(0x83, do_flush_windows) BAD_TRAP(0x84) BAD_TRAP(0x85)
ec98c6b9
DM		 306 BAD_TRAP(0x86) BAD_TRAP(0x87) BAD_TRAP(0x88)
307 BAD_TRAP(0x89) BAD_TRAP(0x8a) BAD_TRAP(0x8b) BAD_TRAP(0x8c)
1da177e4
LT		 308 BAD_TRAP(0x8d) BAD_TRAP(0x8e) BAD_TRAP(0x8f)
309 LINUX_SYSCALL_TRAP BAD_TRAP(0x91) BAD_TRAP(0x92) BAD_TRAP(0x93) BAD_TRAP(0x94)
310 BAD_TRAP(0x95) BAD_TRAP(0x96) BAD_TRAP(0x97) BAD_TRAP(0x98) BAD_TRAP(0x99)
311 BAD_TRAP(0x9a) BAD_TRAP(0x9b) BAD_TRAP(0x9c) BAD_TRAP(0x9d) BAD_TRAP(0x9e)
312 BAD_TRAP(0x9f) GETCC_TRAP SETCC_TRAP GETPSR_TRAP
313 BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6)
ec98c6b9 314 BAD_TRAP(0xa7) BAD_TRAP(0xa8) BAD_TRAP(0xa9) BAD_TRAP(0xaa) BAD_TRAP(0xab)
1da177e4
LT		 315 BAD_TRAP(0xac) BAD_TRAP(0xad) BAD_TRAP(0xae) BAD_TRAP(0xaf) BAD_TRAP(0xb0)
316 BAD_TRAP(0xb1) BAD_TRAP(0xb2) BAD_TRAP(0xb3) BAD_TRAP(0xb4) BAD_TRAP(0xb5)
317 BAD_TRAP(0xb6) BAD_TRAP(0xb7) BAD_TRAP(0xb8) BAD_TRAP(0xb9) BAD_TRAP(0xba)
318 BAD_TRAP(0xbb) BAD_TRAP(0xbc) BAD_TRAP(0xbd) BAD_TRAP(0xbe) BAD_TRAP(0xbf)
319 BAD_TRAP(0xc0) BAD_TRAP(0xc1) BAD_TRAP(0xc2) BAD_TRAP(0xc3) BAD_TRAP(0xc4)
320 BAD_TRAP(0xc5) BAD_TRAP(0xc6) BAD_TRAP(0xc7) BAD_TRAP(0xc8) BAD_TRAP(0xc9)
321 BAD_TRAP(0xca) BAD_TRAP(0xcb) BAD_TRAP(0xcc) BAD_TRAP(0xcd) BAD_TRAP(0xce)
322 BAD_TRAP(0xcf) BAD_TRAP(0xd0) BAD_TRAP(0xd1) BAD_TRAP(0xd2) BAD_TRAP(0xd3)
323 BAD_TRAP(0xd4) BAD_TRAP(0xd5) BAD_TRAP(0xd6) BAD_TRAP(0xd7) BAD_TRAP(0xd8)
324 BAD_TRAP(0xd9) BAD_TRAP(0xda) BAD_TRAP(0xdb) BAD_TRAP(0xdc) BAD_TRAP(0xdd)
325 BAD_TRAP(0xde) BAD_TRAP(0xdf) BAD_TRAP(0xe0) BAD_TRAP(0xe1) BAD_TRAP(0xe2)
326 BAD_TRAP(0xe3) BAD_TRAP(0xe4) BAD_TRAP(0xe5) BAD_TRAP(0xe6) BAD_TRAP(0xe7)
327 BAD_TRAP(0xe8) BAD_TRAP(0xe9) BAD_TRAP(0xea) BAD_TRAP(0xeb) BAD_TRAP(0xec)
328 BAD_TRAP(0xed) BAD_TRAP(0xee) BAD_TRAP(0xef) BAD_TRAP(0xf0) BAD_TRAP(0xf1)
329 BAD_TRAP(0xf2) BAD_TRAP(0xf3) BAD_TRAP(0xf4) BAD_TRAP(0xf5) BAD_TRAP(0xf6)
330 BAD_TRAP(0xf7) BAD_TRAP(0xf8) BAD_TRAP(0xf9) BAD_TRAP(0xfa) BAD_TRAP(0xfb)
e2fdd7fd 331 BAD_TRAP(0xfc) KGDB_TRAP(0xfd) BAD_TRAP(0xfe) BAD_TRAP(0xff)
1da177e4
LT		 332
333trapbase_cpu3:
334 BAD_TRAP(0x0) SRMMU_TFAULT TRAP_ENTRY(0x2, bad_instruction)
335 TRAP_ENTRY(0x3, priv_instruction) TRAP_ENTRY(0x4, fpd_trap_handler)
336 WINDOW_SPILL WINDOW_FILL TRAP_ENTRY(0x7, mna_handler)
337 TRAP_ENTRY(0x8, fpe_trap_handler) SRMMU_DFAULT
338 TRAP_ENTRY(0xa, do_tag_overflow) TRAP_ENTRY(0xb, do_watchpoint)
339 BAD_TRAP(0xc) BAD_TRAP(0xd) BAD_TRAP(0xe) BAD_TRAP(0xf) BAD_TRAP(0x10)
340 TRAP_ENTRY_INTERRUPT(1) TRAP_ENTRY_INTERRUPT(2)
341 TRAP_ENTRY_INTERRUPT(3) TRAP_ENTRY_INTERRUPT(4)
342 TRAP_ENTRY_INTERRUPT(5) TRAP_ENTRY_INTERRUPT(6)
343 TRAP_ENTRY_INTERRUPT(7) TRAP_ENTRY_INTERRUPT(8)
344 TRAP_ENTRY_INTERRUPT(9) TRAP_ENTRY_INTERRUPT(10)
345 TRAP_ENTRY_INTERRUPT(11) TRAP_ENTRY_INTERRUPT(12)
346 TRAP_ENTRY_INTERRUPT(13) TRAP_ENTRY_INTERRUPT(14)
347 TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m)
348 TRAP_ENTRY(0x20, do_reg_access) BAD_TRAP(0x21) BAD_TRAP(0x22)
349 BAD_TRAP(0x23) TRAP_ENTRY(0x24, do_cp_disabled) SKIP_TRAP(0x25, unimp_flush)
350 BAD_TRAP(0x26) BAD_TRAP(0x27) TRAP_ENTRY(0x28, do_cp_exception)
351 SRMMU_DFAULT TRAP_ENTRY(0x2a, do_hw_divzero) BAD_TRAP(0x2b) BAD_TRAP(0x2c)
352 BAD_TRAP(0x2d) BAD_TRAP(0x2e) BAD_TRAP(0x2f) BAD_TRAP(0x30) BAD_TRAP(0x31)
353 BAD_TRAP(0x32) BAD_TRAP(0x33) BAD_TRAP(0x34) BAD_TRAP(0x35) BAD_TRAP(0x36)
354 BAD_TRAP(0x37) BAD_TRAP(0x38) BAD_TRAP(0x39) BAD_TRAP(0x3a) BAD_TRAP(0x3b)
355 BAD_TRAP(0x3c) BAD_TRAP(0x3d) BAD_TRAP(0x3e) BAD_TRAP(0x3f) BAD_TRAP(0x40)
356 BAD_TRAP(0x41) BAD_TRAP(0x42) BAD_TRAP(0x43) BAD_TRAP(0x44) BAD_TRAP(0x45)
357 BAD_TRAP(0x46) BAD_TRAP(0x47) BAD_TRAP(0x48) BAD_TRAP(0x49) BAD_TRAP(0x4a)
358 BAD_TRAP(0x4b) BAD_TRAP(0x4c) BAD_TRAP(0x4d) BAD_TRAP(0x4e) BAD_TRAP(0x4f)
359 BAD_TRAP(0x50)
360 BAD_TRAP(0x51) BAD_TRAP(0x52) BAD_TRAP(0x53) BAD_TRAP(0x54) BAD_TRAP(0x55)
361 BAD_TRAP(0x56) BAD_TRAP(0x57) BAD_TRAP(0x58) BAD_TRAP(0x59) BAD_TRAP(0x5a)
362 BAD_TRAP(0x5b) BAD_TRAP(0x5c) BAD_TRAP(0x5d) BAD_TRAP(0x5e) BAD_TRAP(0x5f)
363 BAD_TRAP(0x60) BAD_TRAP(0x61) BAD_TRAP(0x62) BAD_TRAP(0x63) BAD_TRAP(0x64)
364 BAD_TRAP(0x65) BAD_TRAP(0x66) BAD_TRAP(0x67) BAD_TRAP(0x68) BAD_TRAP(0x69)
365 BAD_TRAP(0x6a) BAD_TRAP(0x6b) BAD_TRAP(0x6c) BAD_TRAP(0x6d) BAD_TRAP(0x6e)
366 BAD_TRAP(0x6f) BAD_TRAP(0x70) BAD_TRAP(0x71) BAD_TRAP(0x72) BAD_TRAP(0x73)
367 BAD_TRAP(0x74) BAD_TRAP(0x75) BAD_TRAP(0x76) BAD_TRAP(0x77) BAD_TRAP(0x78)
368 BAD_TRAP(0x79) BAD_TRAP(0x7a) BAD_TRAP(0x7b) BAD_TRAP(0x7c) BAD_TRAP(0x7d)
369 BAD_TRAP(0x7e) BAD_TRAP(0x7f)
ec98c6b9 370 BAD_TRAP(0x80)
1da177e4
LT		 371 BREAKPOINT_TRAP
372 TRAP_ENTRY(0x82, do_hw_divzero)
373 TRAP_ENTRY(0x83, do_flush_windows) BAD_TRAP(0x84) BAD_TRAP(0x85)
ec98c6b9
DM		 374 BAD_TRAP(0x86) BAD_TRAP(0x87) BAD_TRAP(0x88)
375 BAD_TRAP(0x89) BAD_TRAP(0x8a) BAD_TRAP(0x8b) BAD_TRAP(0x8c)
1da177e4
LT		 376 BAD_TRAP(0x8d) BAD_TRAP(0x8e) BAD_TRAP(0x8f)
377 LINUX_SYSCALL_TRAP BAD_TRAP(0x91) BAD_TRAP(0x92) BAD_TRAP(0x93) BAD_TRAP(0x94)
378 BAD_TRAP(0x95) BAD_TRAP(0x96) BAD_TRAP(0x97) BAD_TRAP(0x98) BAD_TRAP(0x99)
379 BAD_TRAP(0x9a) BAD_TRAP(0x9b) BAD_TRAP(0x9c) BAD_TRAP(0x9d) BAD_TRAP(0x9e)
380 BAD_TRAP(0x9f) GETCC_TRAP SETCC_TRAP GETPSR_TRAP
381 BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6)
ec98c6b9 382 BAD_TRAP(0xa7) BAD_TRAP(0xa8) BAD_TRAP(0xa9) BAD_TRAP(0xaa) BAD_TRAP(0xab)
1da177e4
LT		 383 BAD_TRAP(0xac) BAD_TRAP(0xad) BAD_TRAP(0xae) BAD_TRAP(0xaf) BAD_TRAP(0xb0)
384 BAD_TRAP(0xb1) BAD_TRAP(0xb2) BAD_TRAP(0xb3) BAD_TRAP(0xb4) BAD_TRAP(0xb5)
385 BAD_TRAP(0xb6) BAD_TRAP(0xb7) BAD_TRAP(0xb8) BAD_TRAP(0xb9) BAD_TRAP(0xba)
386 BAD_TRAP(0xbb) BAD_TRAP(0xbc) BAD_TRAP(0xbd) BAD_TRAP(0xbe) BAD_TRAP(0xbf)
387 BAD_TRAP(0xc0) BAD_TRAP(0xc1) BAD_TRAP(0xc2) BAD_TRAP(0xc3) BAD_TRAP(0xc4)
388 BAD_TRAP(0xc5) BAD_TRAP(0xc6) BAD_TRAP(0xc7) BAD_TRAP(0xc8) BAD_TRAP(0xc9)
389 BAD_TRAP(0xca) BAD_TRAP(0xcb) BAD_TRAP(0xcc) BAD_TRAP(0xcd) BAD_TRAP(0xce)
390 BAD_TRAP(0xcf) BAD_TRAP(0xd0) BAD_TRAP(0xd1) BAD_TRAP(0xd2) BAD_TRAP(0xd3)
391 BAD_TRAP(0xd4) BAD_TRAP(0xd5) BAD_TRAP(0xd6) BAD_TRAP(0xd7) BAD_TRAP(0xd8)
392 BAD_TRAP(0xd9) BAD_TRAP(0xda) BAD_TRAP(0xdb) BAD_TRAP(0xdc) BAD_TRAP(0xdd)
393 BAD_TRAP(0xde) BAD_TRAP(0xdf) BAD_TRAP(0xe0) BAD_TRAP(0xe1) BAD_TRAP(0xe2)
394 BAD_TRAP(0xe3) BAD_TRAP(0xe4) BAD_TRAP(0xe5) BAD_TRAP(0xe6) BAD_TRAP(0xe7)
395 BAD_TRAP(0xe8) BAD_TRAP(0xe9) BAD_TRAP(0xea) BAD_TRAP(0xeb) BAD_TRAP(0xec)
396 BAD_TRAP(0xed) BAD_TRAP(0xee) BAD_TRAP(0xef) BAD_TRAP(0xf0) BAD_TRAP(0xf1)
397 BAD_TRAP(0xf2) BAD_TRAP(0xf3) BAD_TRAP(0xf4) BAD_TRAP(0xf5) BAD_TRAP(0xf6)
398 BAD_TRAP(0xf7) BAD_TRAP(0xf8) BAD_TRAP(0xf9) BAD_TRAP(0xfa) BAD_TRAP(0xfb)
e2fdd7fd 399 BAD_TRAP(0xfc) KGDB_TRAP(0xfd) BAD_TRAP(0xfe) BAD_TRAP(0xff)
1da177e4
LT		 400
401#endif
402 .align PAGE_SIZE
403
404/* This was the only reasonable way I could think of to properly align
405 * these page-table data structures.
406 */
407 .globl pg0, pg1, pg2, pg3
408 .globl empty_bad_page
409 .globl empty_bad_page_table
410 .globl empty_zero_page
411 .globl swapper_pg_dir
412swapper_pg_dir: .skip PAGE_SIZE
413pg0: .skip PAGE_SIZE
414pg1: .skip PAGE_SIZE
415pg2: .skip PAGE_SIZE
416pg3: .skip PAGE_SIZE
417empty_bad_page: .skip PAGE_SIZE
418empty_bad_page_table: .skip PAGE_SIZE
419empty_zero_page: .skip PAGE_SIZE
420
421 .global root_flags
422 .global ram_flags
423 .global root_dev
424 .global sparc_ramdisk_image
425 .global sparc_ramdisk_size
426
427/* This stuff has to be in sync with SILO and other potential boot loaders
428 * Fields should be kept upward compatible and whenever any change is made,
429 * HdrS version should be incremented.
430 */
431 .ascii "HdrS"
432 .word LINUX_VERSION_CODE
433 .half 0x0203 /* HdrS version */
434root_flags:
435 .half 1
436root_dev:
437 .half 0
438ram_flags:
439 .half 0
440sparc_ramdisk_image:
441 .word 0
442sparc_ramdisk_size:
443 .word 0
444 .word reboot_command
445 .word 0, 0, 0
446 .word _end
447
448/* Cool, here we go. Pick up the romvec pointer in %o0 and stash it in
449 * %g7 and at prom_vector_p. And also quickly check whether we are on
450 * a v0, v2, or v3 prom.
451 */
452gokernel:
453 /* Ok, it's nice to know, as early as possible, if we
454 * are already mapped where we expect to be in virtual
455 * memory. The Solaris /boot elf format bootloader
456 * will peek into our elf header and load us where
457 * we want to be, otherwise we have to re-map.
458 *
459 * Some boot loaders don't place the jmp'rs address
460 * in %o7, so we do a pc-relative call to a local
461 * label, then see what %o7 has.
462 */
463
464 mov %o7, %g4 ! Save %o7
465
466 /* Jump to it, and pray... */
467current_pc:
468 call 1f
469 nop
470
4711:
472 mov %o7, %g3
473
474 tst %o0
475 be no_sun4u_here
476 mov %g4, %o7 /* Previous %o7. */
477
478 mov %o0, %l0 ! stash away romvec
479 mov %o0, %g7 ! put it here too
480 mov %o1, %l1 ! stash away debug_vec too
481
482 /* Ok, let's check out our run time program counter. */
483 set current_pc, %g5
484 cmp %g3, %g5
485 be already_mapped
486 nop
487
488 /* %l6 will hold the offset we have to subtract
489 * from absolute symbols in order to access areas
490 * in our own image. If already mapped this is
491 * just plain zero, else it is KERNBASE.
492 */
493 set KERNBASE, %l6
494 b copy_prom_lvl14
495 nop
496
497already_mapped:
498 mov 0, %l6
499
500 /* Copy over the Prom's level 14 clock handler. */
501copy_prom_lvl14:
502#if 1
503 /* DJHR
504 * preserve our linked/calculated instructions
505 */
506 set lvl14_save, %g1
507 set t_irq14, %g3
508 sub %g1, %l6, %g1 ! translate to physical
509 sub %g3, %l6, %g3 ! translate to physical
510 ldd [%g3], %g4
511 std %g4, [%g1]
512 ldd [%g3+8], %g4
513 std %g4, [%g1+8]
514#endif
515 rd %tbr, %g1
516 andn %g1, 0xfff, %g1 ! proms trap table base
517 or %g0, (0x1e<<4), %g2 ! offset to lvl14 intr
518 or %g1, %g2, %g2
519 set t_irq14, %g3
520 sub %g3, %l6, %g3
521 ldd [%g2], %g4
522 std %g4, [%g3]
523 ldd [%g2 + 0x8], %g4
524 std %g4, [%g3 + 0x8] ! Copy proms handler
525
526/* Must determine whether we are on a sun4c MMU, SRMMU, or SUN4/400 MUTANT
527 * MMU so we can remap ourselves properly. DON'T TOUCH %l0 thru %l5 in these
528 * remapping routines, we need their values afterwards!
529 */
530 /* Now check whether we are already mapped, if we
531 * are we can skip all this garbage coming up.
532 */
533copy_prom_done:
534 cmp %l6, 0
535 be go_to_highmem ! this will be a nop then
536 nop
537
538 set LOAD_ADDR, %g6
539 cmp %g7, %g6
540 bne remap_not_a_sun4 ! This is not a Sun4
541 nop
542
543 or %g0, 0x1, %g1
544 lduba [%g1] ASI_CONTROL, %g1 ! Only safe to try on Sun4.
545 subcc %g1, 0x24, %g0 ! Is this a mutant Sun4/400???
546 be sun4_mutant_remap ! Ugh, it is...
547 nop
548
549 b sun4_normal_remap ! regular sun4, 2 level mmu
550 nop
551
552remap_not_a_sun4:
553 lda [%g0] ASI_M_MMUREGS, %g1 ! same as ASI_PTE on sun4c
554 and %g1, 0x1, %g1 ! Test SRMMU Enable bit ;-)
555 cmp %g1, 0x0
556 be sun4c_remap ! A sun4c MMU or normal Sun4
557 nop
558srmmu_remap:
559 /* First, check for a viking (TI) module. */
560 set 0x40000000, %g2
561 rd %psr, %g3
562 and %g2, %g3, %g3
563 subcc %g3, 0x0, %g0
564 bz srmmu_nviking
565 nop
566
567 /* Figure out what kind of viking we are on.
568 * We need to know if we have to play with the
569 * AC bit and disable traps or not.
570 */
571
572 /* I've only seen MicroSparc's on SparcClassics with this
573 * bit set.
574 */
575 set 0x800, %g2
576 lda [%g0] ASI_M_MMUREGS, %g3 ! peek in the control reg
577 and %g2, %g3, %g3
578 subcc %g3, 0x0, %g0
579 bnz srmmu_nviking ! is in mbus mode
580 nop
581
582 rd %psr, %g3 ! DO NOT TOUCH %g3
583 andn %g3, PSR_ET, %g2
584 wr %g2, 0x0, %psr
585 WRITE_PAUSE
586
587 /* Get context table pointer, then convert to
588 * a physical address, which is 36 bits.
589 */
590 set AC_M_CTPR, %g4
591 lda [%g4] ASI_M_MMUREGS, %g4
592 sll %g4, 0x4, %g4 ! We use this below
593 ! DO NOT TOUCH %g4
594
595 /* Set the AC bit in the Viking's MMU control reg. */
596 lda [%g0] ASI_M_MMUREGS, %g5 ! DO NOT TOUCH %g5
597 set 0x8000, %g6 ! AC bit mask
598 or %g5, %g6, %g6 ! Or it in...
599 sta %g6, [%g0] ASI_M_MMUREGS ! Close your eyes...
600
601 /* Grrr, why does it seem like every other load/store
602 * on the sun4m is in some ASI space...
603 * Fine with me, let's get the pointer to the level 1
604 * page table directory and fetch its entry.
605 */
606 lda [%g4] ASI_M_BYPASS, %o1 ! This is a level 1 ptr
607 srl %o1, 0x4, %o1 ! Clear low 4 bits
608 sll %o1, 0x8, %o1 ! Make physical
609
610 /* Ok, pull in the PTD. */
611 lda [%o1] ASI_M_BYPASS, %o2 ! This is the 0x0 16MB pgd
612
613 /* Calculate to KERNBASE entry. */
614 add %o1, KERNBASE >> (SRMMU_PGDIR_SHIFT - 2), %o3
615
616 /* Poke the entry into the calculated address. */
617 sta %o2, [%o3] ASI_M_BYPASS
618
619 /* I don't get it Sun, if you engineered all these
620 * boot loaders and the PROM (thank you for the debugging
621 * features btw) why did you not have them load kernel
622 * images up in high address space, since this is necessary
623 * for ABI compliance anyways? Does this low-mapping provide
624 * enhanced interoperability?
625 *
626 * "The PROM is the computer."
627 */
628
629 /* Ok, restore the MMU control register we saved in %g5 */
630 sta %g5, [%g0] ASI_M_MMUREGS ! POW... ouch
631
632 /* Turn traps back on. We saved it in %g3 earlier. */
633 wr %g3, 0x0, %psr ! tick tock, tick tock
634
635 /* Now we burn precious CPU cycles due to bad engineering. */
636 WRITE_PAUSE
637
638 /* Wow, all that just to move a 32-bit value from one
639 * place to another... Jump to high memory.
640 */
641 b go_to_highmem
642 nop
643
644 /* This works on viking's in Mbus mode and all
645 * other MBUS modules. It is virtually the same as
646 * the above madness sans turning traps off and flipping
647 * the AC bit.
648 */
649srmmu_nviking:
650 set AC_M_CTPR, %g1
651 lda [%g1] ASI_M_MMUREGS, %g1 ! get ctx table ptr
652 sll %g1, 0x4, %g1 ! make physical addr
653 lda [%g1] ASI_M_BYPASS, %g1 ! ptr to level 1 pg_table
654 srl %g1, 0x4, %g1
655 sll %g1, 0x8, %g1 ! make phys addr for l1 tbl
656
657 lda [%g1] ASI_M_BYPASS, %g2 ! get level1 entry for 0x0
658 add %g1, KERNBASE >> (SRMMU_PGDIR_SHIFT - 2), %g3
659 sta %g2, [%g3] ASI_M_BYPASS ! place at KERNBASE entry
660 b go_to_highmem
661 nop ! wheee....
662
663 /* This remaps the kernel on Sun4/4xx machines
664 * that have the Sun Mutant Three Level MMU.
665 * It's like a platypus, Sun didn't have the
666 * SRMMU in conception so they kludged the three
667 * level logic in the regular Sun4 MMU probably.
668 *
669 * Basically, you take each entry in the top level
670 * directory that maps the low 3MB starting at
671 * address zero and put the mapping in the KERNBASE
672 * slots. These top level pgd's are called regmaps.
673 */
674sun4_mutant_remap:
675 or %g0, %g0, %g3 ! source base
676 sethi %hi(KERNBASE), %g4 ! destination base
677 or %g4, %lo(KERNBASE), %g4
678 sethi %hi(0x300000), %g5
679 or %g5, %lo(0x300000), %g5 ! upper bound 3MB
680 or %g0, 0x1, %l6
681 sll %l6, 24, %l6 ! Regmap mapping size
682 add %g3, 0x2, %g3 ! Base magic
683 add %g4, 0x2, %g4 ! Base magic
684
685 /* Main remapping loop on Sun4-Mutant-MMU.
686 * "I am not an animal..." -Famous Mutant Person
687 */
688sun4_mutant_loop:
689 lduha [%g3] ASI_REGMAP, %g2 ! Get lower entry
690 stha %g2, [%g4] ASI_REGMAP ! Store in high entry
691 add %g4, %l6, %g4 ! Move up high memory ptr
692 subcc %g3, %g5, %g0 ! Reached our limit?
693 blu sun4_mutant_loop ! Nope, loop again
694 add %g3, %l6, %g3 ! delay, Move up low ptr
695 b go_to_highmem ! Jump to high memory.
696 nop
697
698 /* The following is for non-4/4xx sun4 MMU's. */
699sun4_normal_remap:
700 mov 0, %g3 ! source base
701 set KERNBASE, %g4 ! destination base
702 set 0x300000, %g5 ! upper bound 3MB
703 mov 1, %l6
704 sll %l6, 18, %l6 ! sun4 mmu segmap size
705sun4_normal_loop:
706 lduha [%g3] ASI_SEGMAP, %g6 ! load phys_seg
707 stha %g6, [%g4] ASI_SEGMAP ! stort new virt mapping
708 add %g3, %l6, %g3 ! increment source pointer
709 subcc %g3, %g5, %g0 ! reached limit?
710 blu sun4_normal_loop ! nope, loop again
711 add %g4, %l6, %g4 ! delay, increment dest ptr
712 b go_to_highmem
713 nop
714
715 /* The following works for Sun4c MMU's */
716sun4c_remap:
717 mov 0, %g3 ! source base
718 set KERNBASE, %g4 ! destination base
719 set 0x300000, %g5 ! upper bound 3MB
720 mov 1, %l6
721 sll %l6, 18, %l6 ! sun4c mmu segmap size
722sun4c_remap_loop:
723 lda [%g3] ASI_SEGMAP, %g6 ! load phys_seg
724 sta %g6, [%g4] ASI_SEGMAP ! store new virt mapping
725 add %g3, %l6, %g3 ! Increment source ptr
726 subcc %g3, %g5, %g0 ! Reached limit?
727 bl sun4c_remap_loop ! Nope, loop again
728 add %g4, %l6, %g4 ! delay, Increment dest ptr
729
730/* Now do a non-relative jump so that PC is in high-memory */
731go_to_highmem:
732 set execute_in_high_mem, %g1
733 jmpl %g1, %g0
734 nop
735
736/* The code above should be at beginning and we have to take care about
a0871e8c 737 * short jumps, as branching to .init.text section from .text is usually
1da177e4
LT		 738 * impossible */
739 __INIT
740/* Acquire boot time privileged register values, this will help debugging.
741 * I figure out and store nwindows and nwindowsm1 later on.
742 */
743execute_in_high_mem:
744 mov %l0, %o0 ! put back romvec
745 mov %l1, %o1 ! and debug_vec
746
747 sethi %hi(prom_vector_p), %g1
748 st %o0, [%g1 + %lo(prom_vector_p)]
749
750 sethi %hi(linux_dbvec), %g1
751 st %o1, [%g1 + %lo(linux_dbvec)]
752
753 ld [%o0 + 0x4], %o3
754 and %o3, 0x3, %o5 ! get the version
755
756 cmp %o3, 0x2 ! a v2 prom?
757 be found_version
758 nop
759
760 /* paul@sfe.com.au */
761 cmp %o3, 0x3 ! a v3 prom?
762 be found_version
763 nop
764
765/* Old sun4's pass our load address into %o0 instead of the prom
766 * pointer. On sun4's you have to hard code the romvec pointer into
767 * your code. Sun probably still does that because they don't even
768 * trust their own "OpenBoot" specifications.
769 */
770 set LOAD_ADDR, %g6
771 cmp %o0, %g6 ! an old sun4?
772 be sun4_init
773 nop
774
775found_version:
1da177e4
LT		 776/* Get the machine type via the mysterious romvec node operations. */
777
778 add %g7, 0x1c, %l1
779 ld [%l1], %l0
780 ld [%l0], %l0
781 call %l0
782 or %g0, %g0, %o0 ! next_node(0) = first_node
783 or %o0, %g0, %g6
784
785 sethi %hi(cputypvar), %o1 ! First node has cpu-arch
786 or %o1, %lo(cputypvar), %o1
787 sethi %hi(cputypval), %o2 ! information, the string
788 or %o2, %lo(cputypval), %o2
789 ld [%l1], %l0 ! 'compatibility' tells
790 ld [%l0 + 0xc], %l0 ! that we want 'sun4x' where
791 call %l0 ! x is one of '', 'c', 'm',
792 nop ! 'd' or 'e'. %o2 holds pointer
793 ! to a buf where above string
794 ! will get stored by the prom.
795
796 subcc %o0, %g0, %g0
797 bpos got_prop ! Got the property
798 nop
799
800 or %g6, %g0, %o0
801 sethi %hi(cputypvar_sun4m), %o1
802 or %o1, %lo(cputypvar_sun4m), %o1
803 sethi %hi(cputypval), %o2
804 or %o2, %lo(cputypval), %o2
805 ld [%l1], %l0
806 ld [%l0 + 0xc], %l0
807 call %l0
808 nop
809
810got_prop:
0fd7ef1f
KE		 811#ifdef CONFIG_SPARC_LEON
812 /* no cpu-type check is needed, it is a SPARC-LEON */
8401707f 813
01dae0f0 814 sethi %hi(boot_cpu_id), %g2 ! boot-cpu index
8401707f 815
01dae0f0
DH		 816#ifdef CONFIG_SMP
817 ldub [%g2 + %lo(boot_cpu_id)], %g1
818 cmp %g1, 0xff ! unset means first CPU
819 bne leon_smp_cpu_startup ! continue only with master
820 nop
821#endif
822 /* Get CPU-ID from most significant 4-bit of ASR17 */
823 rd %asr17, %g1
824 srl %g1, 28, %g1
8401707f 825
01dae0f0
DH		 826 /* Update boot_cpu_id only on boot cpu */
827 stub %g1, [%g2 + %lo(boot_cpu_id)]
8401707f 828
0fd7ef1f
KE		 829 ba sun4c_continue_boot
830 nop
831#endif
1da177e4
LT		 832 set cputypval, %o2
833 ldub [%o2 + 0x4], %l1
834
835 cmp %l1, ' '
836 be 1f
837 cmp %l1, 'c'
838 be 1f
839 cmp %l1, 'm'
840 be 1f
841 cmp %l1, 's'
842 be 1f
843 cmp %l1, 'd'
844 be 1f
845 cmp %l1, 'e'
846 be no_sun4e_here ! Could be a sun4e.
847 nop
848 b no_sun4u_here ! AIEEE, a V9 sun4u... Get our BIG BROTHER kernel :))
849 nop
850
8511: set cputypval, %l1
852 ldub [%l1 + 0x4], %l1
853 cmp %l1, 'm' ! Test for sun4d, sun4e ?
854 be sun4m_init
855 cmp %l1, 's' ! Treat sun4s as sun4m
856 be sun4m_init
857 cmp %l1, 'd' ! Let us see how the beast will die
858 be sun4d_init
859 nop
860
861 /* Jump into mmu context zero. */
862 set AC_CONTEXT, %g1
863 stba %g0, [%g1] ASI_CONTROL
864
865 b sun4c_continue_boot
866 nop
867
868/* CPUID in bootbus can be found at PA 0xff0140000 */
869#define SUN4D_BOOTBUS_CPUID 0xf0140000
870
871sun4d_init:
872 /* Need to patch call to handler_irq */
873 set patch_handler_irq, %g4
874 set sun4d_handler_irq, %g5
875 sethi %hi(0x40000000), %g3 ! call
876 sub %g5, %g4, %g5
877 srl %g5, 2, %g5
878 or %g5, %g3, %g5
879 st %g5, [%g4]
880
881#ifdef CONFIG_SMP
882 /* Get our CPU id out of bootbus */
883 set SUN4D_BOOTBUS_CPUID, %g3
884 lduba [%g3] ASI_M_CTL, %g3
885 and %g3, 0xf8, %g3
886 srl %g3, 3, %g4
887 sta %g4, [%g0] ASI_M_VIKING_TMP1
888 sethi %hi(boot_cpu_id), %g5
889 stb %g4, [%g5 + %lo(boot_cpu_id)]
1da177e4
LT		 890#endif
891
892 /* Fall through to sun4m_init */
893
894sun4m_init:
895 /* XXX Fucking Cypress... */
896 lda [%g0] ASI_M_MMUREGS, %g5
897 srl %g5, 28, %g4
898
899 cmp %g4, 1
900 bne 1f
901 srl %g5, 24, %g4
902
903 and %g4, 0xf, %g4
904 cmp %g4, 7 /* This would be a HyperSparc. */
905
906 bne 2f
907 nop
908
9091:
910
911#define PATCH_IT(dst, src) \
912 set (dst), %g5; \
913 set (src), %g4; \
914 ld [%g4], %g3; \
915 st %g3, [%g5]; \
916 ld [%g4+0x4], %g3; \
917 st %g3, [%g5+0x4];
918
919 /* Signed multiply. */
920 PATCH_IT(.mul, .mul_patch)
921 PATCH_IT(.mul+0x08, .mul_patch+0x08)
922
923 /* Signed remainder. */
924 PATCH_IT(.rem, .rem_patch)
925 PATCH_IT(.rem+0x08, .rem_patch+0x08)
926 PATCH_IT(.rem+0x10, .rem_patch+0x10)
927 PATCH_IT(.rem+0x18, .rem_patch+0x18)
928 PATCH_IT(.rem+0x20, .rem_patch+0x20)
929 PATCH_IT(.rem+0x28, .rem_patch+0x28)
930
931 /* Signed division. */
932 PATCH_IT(.div, .div_patch)
933 PATCH_IT(.div+0x08, .div_patch+0x08)
934 PATCH_IT(.div+0x10, .div_patch+0x10)
935 PATCH_IT(.div+0x18, .div_patch+0x18)
936 PATCH_IT(.div+0x20, .div_patch+0x20)
937
938 /* Unsigned multiply. */
939 PATCH_IT(.umul, .umul_patch)
940 PATCH_IT(.umul+0x08, .umul_patch+0x08)
941
942 /* Unsigned remainder. */
943 PATCH_IT(.urem, .urem_patch)
944 PATCH_IT(.urem+0x08, .urem_patch+0x08)
945 PATCH_IT(.urem+0x10, .urem_patch+0x10)
946 PATCH_IT(.urem+0x18, .urem_patch+0x18)
947
948 /* Unsigned division. */
949 PATCH_IT(.udiv, .udiv_patch)
950 PATCH_IT(.udiv+0x08, .udiv_patch+0x08)
951 PATCH_IT(.udiv+0x10, .udiv_patch+0x10)
952
953#undef PATCH_IT
954
955/* Ok, the PROM could have done funny things and apple cider could still
956 * be sitting in the fault status/address registers. Read them all to
957 * clear them so we don't get magic faults later on.
958 */
959/* This sucks, apparently this makes Vikings call prom panic, will fix later */
9602:
961 rd %psr, %o1
962 srl %o1, 28, %o1 ! Get a type of the CPU
963
964 subcc %o1, 4, %g0 ! TI: Viking or MicroSPARC
965 be sun4c_continue_boot
966 nop
967
968 set AC_M_SFSR, %o0
969 lda [%o0] ASI_M_MMUREGS, %g0
970 set AC_M_SFAR, %o0
971 lda [%o0] ASI_M_MMUREGS, %g0
972
973 /* Fujitsu MicroSPARC-II has no asynchronous flavors of FARs */
974 subcc %o1, 0, %g0
975 be sun4c_continue_boot
976 nop
977
978 set AC_M_AFSR, %o0
979 lda [%o0] ASI_M_MMUREGS, %g0
980 set AC_M_AFAR, %o0
981 lda [%o0] ASI_M_MMUREGS, %g0
982 nop
983
984
985sun4c_continue_boot:
986
987
988/* Aieee, now set PC and nPC, enable traps, give ourselves a stack and it's
989 * show-time!
990 */
991
992 sethi %hi(cputyp), %o0
993 st %g4, [%o0 + %lo(cputyp)]
994
995 /* Turn on Supervisor, EnableFloating, and all the PIL bits.
996 * Also puts us in register window zero with traps off.
997 */
998 set (PSR_PS | PSR_S | PSR_PIL | PSR_EF), %g2
999 wr %g2, 0x0, %psr
1000 WRITE_PAUSE
1001
1002 /* I want a kernel stack NOW! */
1003 set init_thread_union, %g1
1004 set (THREAD_SIZE - STACKFRAME_SZ), %g2
1005 add %g1, %g2, %sp
1006 mov 0, %fp /* And for good luck */
1007
1008 /* Zero out our BSS section. */
1009 set __bss_start , %o0 ! First address of BSS
86ed40bd 1010 set _end , %o1 ! Last address of BSS
1da177e4
LT		 1011 add %o0, 0x1, %o0
10121:
1013 stb %g0, [%o0]
1014 subcc %o0, %o1, %g0
1015 bl 1b
1016 add %o0, 0x1, %o0
1017
5fcafb7a
DH		 1018 /* If boot_cpu_id has not been setup by machine specific
1019 * init-code above we default it to zero.
1020 */
1021 sethi %hi(boot_cpu_id), %g2
1022 ldub [%g2 + %lo(boot_cpu_id)], %g3
1023 cmp %g3, 0xff
1024 bne 1f
1025 nop
1026 mov %g0, %g3
1027 stub %g3, [%g2 + %lo(boot_cpu_id)]
1028
10291: /* boot_cpu_id set. calculate boot_cpu_id4 = boot_cpu_id*4 */
1030 sll %g3, 2, %g3
1031 sethi %hi(boot_cpu_id4), %g2
1032 stub %g3, [%g2 + %lo(boot_cpu_id4)]
1033
1da177e4
LT		 1034 /* Initialize the uwinmask value for init task just in case.
1035 * But first make current_set[boot_cpu_id] point to something useful.
1036 */
1037 set init_thread_union, %g6
1038 set current_set, %g2
1039#ifdef CONFIG_SMP
1da177e4
LT		 1040 st %g6, [%g2]
1041 add %g2, %g3, %g2
1042#endif
1043 st %g6, [%g2]
1044
1045 st %g0, [%g6 + TI_UWINMASK]
1046
1047/* Compute NWINDOWS and stash it away. Now uses %wim trick explained
1048 * in the V8 manual. Ok, this method seems to work, Sparc is cool...
1049 * No, it doesn't work, have to play the save/readCWP/restore trick.
1050 */
1051
1052 wr %g0, 0x0, %wim ! so we do not get a trap
1053 WRITE_PAUSE
1054
1055 save
1056
1057 rd %psr, %g3
1058
1059 restore
1060
1061 and %g3, 0x1f, %g3
1062 add %g3, 0x1, %g3
1063
1064 mov 2, %g1
1065 wr %g1, 0x0, %wim ! make window 1 invalid
1066 WRITE_PAUSE
1067
1068 cmp %g3, 0x7
1069 bne 2f
1070 nop
1071
1072 /* Adjust our window handling routines to
1073 * do things correctly on 7 window Sparcs.
1074 */
1075
1076#define PATCH_INSN(src, dest) \
1077 set src, %g5; \
1078 set dest, %g2; \
1079 ld [%g5], %g4; \
1080 st %g4, [%g2];
1081
1082 /* Patch for window spills... */
1083 PATCH_INSN(spnwin_patch1_7win, spnwin_patch1)
1084 PATCH_INSN(spnwin_patch2_7win, spnwin_patch2)
1085 PATCH_INSN(spnwin_patch3_7win, spnwin_patch3)
1086
1087 /* Patch for window fills... */
1088 PATCH_INSN(fnwin_patch1_7win, fnwin_patch1)
1089 PATCH_INSN(fnwin_patch2_7win, fnwin_patch2)
1090
1091 /* Patch for trap entry setup... */
1092 PATCH_INSN(tsetup_7win_patch1, tsetup_patch1)
1093 PATCH_INSN(tsetup_7win_patch2, tsetup_patch2)
1094 PATCH_INSN(tsetup_7win_patch3, tsetup_patch3)
1095 PATCH_INSN(tsetup_7win_patch4, tsetup_patch4)
1096 PATCH_INSN(tsetup_7win_patch5, tsetup_patch5)
1097 PATCH_INSN(tsetup_7win_patch6, tsetup_patch6)
1098
1099 /* Patch for returning from traps... */
1100 PATCH_INSN(rtrap_7win_patch1, rtrap_patch1)
1101 PATCH_INSN(rtrap_7win_patch2, rtrap_patch2)
1102 PATCH_INSN(rtrap_7win_patch3, rtrap_patch3)
1103 PATCH_INSN(rtrap_7win_patch4, rtrap_patch4)
1104 PATCH_INSN(rtrap_7win_patch5, rtrap_patch5)
1105
1106 /* Patch for killing user windows from the register file. */
1107 PATCH_INSN(kuw_patch1_7win, kuw_patch1)
1108
1109 /* Now patch the kernel window flush sequences.
1110 * This saves 2 traps on every switch and fork.
1111 */
1112 set 0x01000000, %g4
1113 set flush_patch_one, %g5
1114 st %g4, [%g5 + 0x18]
1115 st %g4, [%g5 + 0x1c]
1116 set flush_patch_two, %g5
1117 st %g4, [%g5 + 0x18]
1118 st %g4, [%g5 + 0x1c]
1119 set flush_patch_three, %g5
1120 st %g4, [%g5 + 0x18]
1121 st %g4, [%g5 + 0x1c]
1122 set flush_patch_four, %g5
1123 st %g4, [%g5 + 0x18]
1124 st %g4, [%g5 + 0x1c]
1125 set flush_patch_exception, %g5
1126 st %g4, [%g5 + 0x18]
1127 st %g4, [%g5 + 0x1c]
1128 set flush_patch_switch, %g5
1129 st %g4, [%g5 + 0x18]
1130 st %g4, [%g5 + 0x1c]
1131
11322:
1133 sethi %hi(nwindows), %g4
1134 st %g3, [%g4 + %lo(nwindows)] ! store final value
1135 sub %g3, 0x1, %g3
1136 sethi %hi(nwindowsm1), %g4
1137 st %g3, [%g4 + %lo(nwindowsm1)]
1138
1139 /* Here we go, start using Linux's trap table... */
1140 set trapbase, %g3
1141 wr %g3, 0x0, %tbr
1142 WRITE_PAUSE
1143
1144 /* Finally, turn on traps so that we can call c-code. */
1145 rd %psr, %g3
1146 wr %g3, 0x0, %psr
1147 WRITE_PAUSE
1148
1149 wr %g3, PSR_ET, %psr
1150 WRITE_PAUSE
1151
1152 /* First we call prom_init() to set up PROMLIB, then
1153 * off to start_kernel().
1154 */
1155
1156 sethi %hi(prom_vector_p), %g5
1157 ld [%g5 + %lo(prom_vector_p)], %o0
1158 call prom_init
1159 nop
1160
1161 call start_kernel
1162 nop
1163
1164 /* We should not get here. */
1165 call halt_me
1166 nop
1167
1168sun4_init:
1da177e4
LT		 1169 sethi %hi(SUN4_PROM_VECTOR+0x84), %o1
1170 ld [%o1 + %lo(SUN4_PROM_VECTOR+0x84)], %o1
1171 set sun4_notsup, %o0
1172 call %o1 /* printf */
1173 nop
1174 sethi %hi(SUN4_PROM_VECTOR+0xc4), %o1
1175 ld [%o1 + %lo(SUN4_PROM_VECTOR+0xc4)], %o1
1176 call %o1 /* exittomon */
1177 nop
11781: ba 1b ! Cannot exit into KMON
1179 nop
5110bd21 1180
1da177e4
LT		 1181no_sun4e_here:
1182 ld [%g7 + 0x68], %o1
1183 set sun4e_notsup, %o0
1184 call %o1
1185 nop
1186 b halt_me
1187 nop
1188
1189 __INITDATA
1190
1191sun4u_1:
1192 .asciz "finddevice"
1193 .align 4
1194sun4u_2:
1195 .asciz "/chosen"
1196 .align 4
1197sun4u_3:
1198 .asciz "getprop"
1199 .align 4
1200sun4u_4:
1201 .asciz "stdout"
1202 .align 4
1203sun4u_5:
1204 .asciz "write"
1205 .align 4
1206sun4u_6:
1207 .asciz "\n\rOn sun4u you have to use UltraLinux (64bit) kernel\n\rand not a 32bit sun4[cdem] version\n\r\n\r"
1208sun4u_6e:
1209 .align 4
1210sun4u_7:
1211 .asciz "exit"
1212 .align 8
1213sun4u_a1:
1214 .word 0, sun4u_1, 0, 1, 0, 1, 0, sun4u_2, 0
1215sun4u_r1:
1216 .word 0
1217sun4u_a2:
1218 .word 0, sun4u_3, 0, 4, 0, 1, 0
1219sun4u_i2:
1220 .word 0, 0, sun4u_4, 0, sun4u_1, 0, 8, 0
1221sun4u_r2:
1222 .word 0
1223sun4u_a3:
1224 .word 0, sun4u_5, 0, 3, 0, 1, 0
1225sun4u_i3:
1226 .word 0, 0, sun4u_6, 0, sun4u_6e - sun4u_6 - 1, 0
1227sun4u_r3:
1228 .word 0
1229sun4u_a4:
1230 .word 0, sun4u_7, 0, 0, 0, 0
1231sun4u_r4:
1232
1233 __INIT
1234no_sun4u_here:
1235 set sun4u_a1, %o0
1236 set current_pc, %l2
1237 cmp %l2, %g3
1238 be 1f
1239 mov %o4, %l0
1240 sub %g3, %l2, %l6
1241 add %o0, %l6, %o0
1242 mov %o0, %l4
1243 mov sun4u_r4 - sun4u_a1, %l3
1244 ld [%l4], %l5
12452:
1246 add %l4, 4, %l4
1247 cmp %l5, %l2
1248 add %l5, %l6, %l5
1249 bgeu,a 3f
1250 st %l5, [%l4 - 4]
12513:
1252 subcc %l3, 4, %l3
1253 bne 2b
1254 ld [%l4], %l5
12551:
1256 call %l0
1257 mov %o0, %l1
1258
1259 ld [%l1 + (sun4u_r1 - sun4u_a1)], %o1
1260 add %l1, (sun4u_a2 - sun4u_a1), %o0
1261 call %l0
1262 st %o1, [%o0 + (sun4u_i2 - sun4u_a2)]
1263
1264 ld [%l1 + (sun4u_1 - sun4u_a1)], %o1
1265 add %l1, (sun4u_a3 - sun4u_a1), %o0
1266 call %l0
1267 st %o1, [%o0 + (sun4u_i3 - sun4u_a3)]
1268
1269 call %l0
1270 add %l1, (sun4u_a4 - sun4u_a1), %o0
1271
1272 /* Not reached */
1273halt_me:
1274 ld [%g7 + 0x74], %o0
1275 call %o0 ! Get us out of here...
1276 nop ! Apparently Solaris is better.
1277
1278/* Ok, now we continue in the .data/.text sections */
1279
1280 .data
1281 .align 4
1282
1283/*
1284 * Fill up the prom vector, note in particular the kind first element,
1285 * no joke. I don't need all of them in here as the entire prom vector
1286 * gets initialized in c-code so all routines can use it.
1287 */
1288
1da177e4
LT		 1289prom_vector_p:
1290 .word 0
1291
1292/* We calculate the following at boot time, window fills/spills and trap entry
1293 * code uses these to keep track of the register windows.
1294 */
1295
1296 .align 4
1297 .globl nwindows
1298 .globl nwindowsm1
1299nwindows:
1300 .word 8
1301nwindowsm1:
1302 .word 7
1303
1304/* Boot time debugger vector value. We need this later on. */
1305
1306 .align 4
1307 .globl linux_dbvec
1308linux_dbvec:
1309 .word 0
1310 .word 0
1311
1312 .align 8
1313
1314 .globl lvl14_save
1315lvl14_save:
1316 .word 0
1317 .word 0
1318 .word 0
1319 .word 0
1320 .word t_irq14
1321
1322 .section ".fixup",#alloc,#execinstr
1323 .globl __ret_efault
1324__ret_efault:
1325 ret
1326 restore %g0, -EFAULT, %o0
Linux kernel - Deliverables
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