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sparc32: Kill boot_cpu_id4
[linux-block.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
eb06f476
SR		 29/* The following are used with the prom_vector node-ops to figure out
30 * the cpu-type
1da177e4 31 */
1da177e4 32 .align 4
1da177e4
LT		 33cputyp:
34 .word 1
35
36 .align 4
37 .globl cputypval
38cputypval:
eb06f476 39 .asciz "sun4m"
1da177e4
LT		 40 .ascii " "
41
eb06f476 42/* Tested on SS-5, SS-10 */
1da177e4 43 .align 4
1da177e4 44cputypvar:
1da177e4
LT		 45 .asciz "compatible"
46
47 .align 4
48
323206a1
SR		 49sun4c_notsup:
50 .asciz "Sparc-Linux sun4/sun4c support does no longer exist.\n\n"
1da177e4 51 .align 4
1da177e4
LT		 52
53sun4e_notsup:
54 .asciz "Sparc-Linux sun4e support does not exist\n\n"
55 .align 4
56
1da177e4 57 /* The Sparc trap table, bootloader gives us control at _start. */
ce8a7424 58 __HEAD
b2a39b0d 59 .globl _stext, _start, __stext
1da177e4
LT		 60 .globl trapbase
61_start: /* danger danger */
62__stext:
63_stext:
1da177e4
LT		 64trapbase:
65#ifdef CONFIG_SMP
66trapbase_cpu0:
67#endif
68/* We get control passed to us here at t_zero. */
69t_zero: b gokernel; nop; nop; nop;
306f1231 70t_tflt: SRMMU_TFAULT /* Inst. Access Exception */
1da177e4
LT		 71t_bins: TRAP_ENTRY(0x2, bad_instruction) /* Illegal Instruction */
72t_pins: TRAP_ENTRY(0x3, priv_instruction) /* Privileged Instruction */
73t_fpd: TRAP_ENTRY(0x4, fpd_trap_handler) /* Floating Point Disabled */
74t_wovf: WINDOW_SPILL /* Window Overflow */
75t_wunf: WINDOW_FILL /* Window Underflow */
76t_mna: TRAP_ENTRY(0x7, mna_handler) /* Memory Address Not Aligned */
77t_fpe: TRAP_ENTRY(0x8, fpe_trap_handler) /* Floating Point Exception */
306f1231 78t_dflt: SRMMU_DFAULT /* Data Miss Exception */
1da177e4
LT		 79t_tio: TRAP_ENTRY(0xa, do_tag_overflow) /* Tagged Instruction Ovrflw */
80t_wpt: TRAP_ENTRY(0xb, do_watchpoint) /* Watchpoint Detected */
81t_badc: BAD_TRAP(0xc) BAD_TRAP(0xd) BAD_TRAP(0xe) BAD_TRAP(0xf) BAD_TRAP(0x10)
82t_irq1: TRAP_ENTRY_INTERRUPT(1) /* IRQ Software/SBUS Level 1 */
83t_irq2: TRAP_ENTRY_INTERRUPT(2) /* IRQ SBUS Level 2 */
84t_irq3: TRAP_ENTRY_INTERRUPT(3) /* IRQ SCSI/DMA/SBUS Level 3 */
85t_irq4: TRAP_ENTRY_INTERRUPT(4) /* IRQ Software Level 4 */
86t_irq5: TRAP_ENTRY_INTERRUPT(5) /* IRQ SBUS/Ethernet Level 5 */
87t_irq6: TRAP_ENTRY_INTERRUPT(6) /* IRQ Software Level 6 */
88t_irq7: TRAP_ENTRY_INTERRUPT(7) /* IRQ Video/SBUS Level 5 */
89t_irq8: TRAP_ENTRY_INTERRUPT(8) /* IRQ SBUS Level 6 */
90t_irq9: TRAP_ENTRY_INTERRUPT(9) /* IRQ SBUS Level 7 */
91t_irq10:TRAP_ENTRY_INTERRUPT(10) /* IRQ Timer #1 (one we use) */
92t_irq11:TRAP_ENTRY_INTERRUPT(11) /* IRQ Floppy Intr. */
93t_irq12:TRAP_ENTRY_INTERRUPT(12) /* IRQ Zilog serial chip */
94t_irq13:TRAP_ENTRY_INTERRUPT(13) /* IRQ Audio Intr. */
95t_irq14:TRAP_ENTRY_INTERRUPT(14) /* IRQ Timer #2 */
96 .globl t_nmi
96061a91 97t_nmi: TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m)
2c1cfb2d 98
1da177e4
LT		 99t_racc: TRAP_ENTRY(0x20, do_reg_access) /* General Register Access Error */
100t_iacce:BAD_TRAP(0x21) /* Instr Access Error */
101t_bad22:BAD_TRAP(0x22) BAD_TRAP(0x23)
102t_cpdis:TRAP_ENTRY(0x24, do_cp_disabled) /* Co-Processor Disabled */
103t_uflsh:SKIP_TRAP(0x25, unimp_flush) /* Unimplemented FLUSH inst. */
104t_bad26:BAD_TRAP(0x26) BAD_TRAP(0x27)
105t_cpexc:TRAP_ENTRY(0x28, do_cp_exception) /* Co-Processor Exception */
306f1231 106t_dacce:SRMMU_DFAULT /* Data Access Error */
1da177e4
LT		 107t_hwdz: TRAP_ENTRY(0x2a, do_hw_divzero) /* Division by zero, you lose... */
108t_dserr:BAD_TRAP(0x2b) /* Data Store Error */
109t_daccm:BAD_TRAP(0x2c) /* Data Access MMU-Miss */
110t_bad2d:BAD_TRAP(0x2d) BAD_TRAP(0x2e) BAD_TRAP(0x2f) BAD_TRAP(0x30) BAD_TRAP(0x31)
111t_bad32:BAD_TRAP(0x32) BAD_TRAP(0x33) BAD_TRAP(0x34) BAD_TRAP(0x35) BAD_TRAP(0x36)
112t_bad37:BAD_TRAP(0x37) BAD_TRAP(0x38) BAD_TRAP(0x39) BAD_TRAP(0x3a) BAD_TRAP(0x3b)
113t_iaccm:BAD_TRAP(0x3c) /* Instr Access MMU-Miss */
114t_bad3d:BAD_TRAP(0x3d) BAD_TRAP(0x3e) BAD_TRAP(0x3f) BAD_TRAP(0x40) BAD_TRAP(0x41)
115t_bad42:BAD_TRAP(0x42) BAD_TRAP(0x43) BAD_TRAP(0x44) BAD_TRAP(0x45) BAD_TRAP(0x46)
116t_bad47:BAD_TRAP(0x47) BAD_TRAP(0x48) BAD_TRAP(0x49) BAD_TRAP(0x4a) BAD_TRAP(0x4b)
117t_bad4c:BAD_TRAP(0x4c) BAD_TRAP(0x4d) BAD_TRAP(0x4e) BAD_TRAP(0x4f) BAD_TRAP(0x50)
118t_bad51:BAD_TRAP(0x51) BAD_TRAP(0x52) BAD_TRAP(0x53) BAD_TRAP(0x54) BAD_TRAP(0x55)
119t_bad56:BAD_TRAP(0x56) BAD_TRAP(0x57) BAD_TRAP(0x58) BAD_TRAP(0x59) BAD_TRAP(0x5a)
120t_bad5b:BAD_TRAP(0x5b) BAD_TRAP(0x5c) BAD_TRAP(0x5d) BAD_TRAP(0x5e) BAD_TRAP(0x5f)
121t_bad60:BAD_TRAP(0x60) BAD_TRAP(0x61) BAD_TRAP(0x62) BAD_TRAP(0x63) BAD_TRAP(0x64)
122t_bad65:BAD_TRAP(0x65) BAD_TRAP(0x66) BAD_TRAP(0x67) BAD_TRAP(0x68) BAD_TRAP(0x69)
123t_bad6a:BAD_TRAP(0x6a) BAD_TRAP(0x6b) BAD_TRAP(0x6c) BAD_TRAP(0x6d) BAD_TRAP(0x6e)
124t_bad6f:BAD_TRAP(0x6f) BAD_TRAP(0x70) BAD_TRAP(0x71) BAD_TRAP(0x72) BAD_TRAP(0x73)
125t_bad74:BAD_TRAP(0x74) BAD_TRAP(0x75) BAD_TRAP(0x76) BAD_TRAP(0x77) BAD_TRAP(0x78)
126t_bad79:BAD_TRAP(0x79) BAD_TRAP(0x7a) BAD_TRAP(0x7b) BAD_TRAP(0x7c) BAD_TRAP(0x7d)
127t_bad7e:BAD_TRAP(0x7e) BAD_TRAP(0x7f)
ec98c6b9 128t_bad80:BAD_TRAP(0x80) /* SunOS System Call */
1da177e4
LT		 129t_sbkpt:BREAKPOINT_TRAP /* Software Breakpoint/KGDB */
130t_divz: TRAP_ENTRY(0x82, do_hw_divzero) /* Divide by zero trap */
131t_flwin:TRAP_ENTRY(0x83, do_flush_windows) /* Flush Windows Trap */
132t_clwin:BAD_TRAP(0x84) /* Clean Windows Trap */
133t_rchk: BAD_TRAP(0x85) /* Range Check */
134t_funal:BAD_TRAP(0x86) /* Fix Unaligned Access Trap */
135t_iovf: BAD_TRAP(0x87) /* Integer Overflow Trap */
ec98c6b9
DM		 136t_bad88:BAD_TRAP(0x88) /* Slowaris System Call */
137t_bad89:BAD_TRAP(0x89) /* Net-B.S. System Call */
1da177e4
LT		 138t_bad8a:BAD_TRAP(0x8a) BAD_TRAP(0x8b) BAD_TRAP(0x8c) BAD_TRAP(0x8d) BAD_TRAP(0x8e)
139t_bad8f:BAD_TRAP(0x8f)
140t_linux:LINUX_SYSCALL_TRAP /* Linux System Call */
141t_bad91:BAD_TRAP(0x91) BAD_TRAP(0x92) BAD_TRAP(0x93) BAD_TRAP(0x94) BAD_TRAP(0x95)
142t_bad96:BAD_TRAP(0x96) BAD_TRAP(0x97) BAD_TRAP(0x98) BAD_TRAP(0x99) BAD_TRAP(0x9a)
143t_bad9b:BAD_TRAP(0x9b) BAD_TRAP(0x9c) BAD_TRAP(0x9d) BAD_TRAP(0x9e) BAD_TRAP(0x9f)
144t_getcc:GETCC_TRAP /* Get Condition Codes */
145t_setcc:SETCC_TRAP /* Set Condition Codes */
146t_getpsr:GETPSR_TRAP /* Get PSR Register */
147t_bada3:BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6)
ec98c6b9 148t_bada7:BAD_TRAP(0xa7)
1da177e4
LT		 149t_bada8:BAD_TRAP(0xa8) BAD_TRAP(0xa9) BAD_TRAP(0xaa) BAD_TRAP(0xab)
150t_badac:BAD_TRAP(0xac) BAD_TRAP(0xad) BAD_TRAP(0xae) BAD_TRAP(0xaf) BAD_TRAP(0xb0)
151t_badb1:BAD_TRAP(0xb1) BAD_TRAP(0xb2) BAD_TRAP(0xb3) BAD_TRAP(0xb4) BAD_TRAP(0xb5)
152t_badb6:BAD_TRAP(0xb6) BAD_TRAP(0xb7) BAD_TRAP(0xb8) BAD_TRAP(0xb9) BAD_TRAP(0xba)
153t_badbb:BAD_TRAP(0xbb) BAD_TRAP(0xbc) BAD_TRAP(0xbd) BAD_TRAP(0xbe) BAD_TRAP(0xbf)
154t_badc0:BAD_TRAP(0xc0) BAD_TRAP(0xc1) BAD_TRAP(0xc2) BAD_TRAP(0xc3) BAD_TRAP(0xc4)
155t_badc5:BAD_TRAP(0xc5) BAD_TRAP(0xc6) BAD_TRAP(0xc7) BAD_TRAP(0xc8) BAD_TRAP(0xc9)
156t_badca:BAD_TRAP(0xca) BAD_TRAP(0xcb) BAD_TRAP(0xcc) BAD_TRAP(0xcd) BAD_TRAP(0xce)
157t_badcf:BAD_TRAP(0xcf) BAD_TRAP(0xd0) BAD_TRAP(0xd1) BAD_TRAP(0xd2) BAD_TRAP(0xd3)
158t_badd4:BAD_TRAP(0xd4) BAD_TRAP(0xd5) BAD_TRAP(0xd6) BAD_TRAP(0xd7) BAD_TRAP(0xd8)
159t_badd9:BAD_TRAP(0xd9) BAD_TRAP(0xda) BAD_TRAP(0xdb) BAD_TRAP(0xdc) BAD_TRAP(0xdd)
160t_badde:BAD_TRAP(0xde) BAD_TRAP(0xdf) BAD_TRAP(0xe0) BAD_TRAP(0xe1) BAD_TRAP(0xe2)
161t_bade3:BAD_TRAP(0xe3) BAD_TRAP(0xe4) BAD_TRAP(0xe5) BAD_TRAP(0xe6) BAD_TRAP(0xe7)
162t_bade8:BAD_TRAP(0xe8) BAD_TRAP(0xe9) BAD_TRAP(0xea) BAD_TRAP(0xeb) BAD_TRAP(0xec)
163t_baded:BAD_TRAP(0xed) BAD_TRAP(0xee) BAD_TRAP(0xef) BAD_TRAP(0xf0) BAD_TRAP(0xf1)
164t_badf2:BAD_TRAP(0xf2) BAD_TRAP(0xf3) BAD_TRAP(0xf4) BAD_TRAP(0xf5) BAD_TRAP(0xf6)
165t_badf7:BAD_TRAP(0xf7) BAD_TRAP(0xf8) BAD_TRAP(0xf9) BAD_TRAP(0xfa) BAD_TRAP(0xfb)
e2fdd7fd
DM		 166t_badfc:BAD_TRAP(0xfc)
167t_kgdb: KGDB_TRAP(0xfd)
1da177e4
LT		 168dbtrap: BAD_TRAP(0xfe) /* Debugger/PROM breakpoint #1 */
169dbtrap2:BAD_TRAP(0xff) /* Debugger/PROM breakpoint #2 */
170
171 .globl end_traptable
172end_traptable:
173
174#ifdef CONFIG_SMP
175 /* Trap tables for the other cpus. */
176 .globl trapbase_cpu1, trapbase_cpu2, trapbase_cpu3
177trapbase_cpu1:
178 BAD_TRAP(0x0) SRMMU_TFAULT TRAP_ENTRY(0x2, bad_instruction)
179 TRAP_ENTRY(0x3, priv_instruction) TRAP_ENTRY(0x4, fpd_trap_handler)
180 WINDOW_SPILL WINDOW_FILL TRAP_ENTRY(0x7, mna_handler)
181 TRAP_ENTRY(0x8, fpe_trap_handler) SRMMU_DFAULT
182 TRAP_ENTRY(0xa, do_tag_overflow) TRAP_ENTRY(0xb, do_watchpoint)
183 BAD_TRAP(0xc) BAD_TRAP(0xd) BAD_TRAP(0xe) BAD_TRAP(0xf) BAD_TRAP(0x10)
184 TRAP_ENTRY_INTERRUPT(1) TRAP_ENTRY_INTERRUPT(2)
185 TRAP_ENTRY_INTERRUPT(3) TRAP_ENTRY_INTERRUPT(4)
186 TRAP_ENTRY_INTERRUPT(5) TRAP_ENTRY_INTERRUPT(6)
187 TRAP_ENTRY_INTERRUPT(7) TRAP_ENTRY_INTERRUPT(8)
188 TRAP_ENTRY_INTERRUPT(9) TRAP_ENTRY_INTERRUPT(10)
189 TRAP_ENTRY_INTERRUPT(11) TRAP_ENTRY_INTERRUPT(12)
190 TRAP_ENTRY_INTERRUPT(13) TRAP_ENTRY_INTERRUPT(14)
191 TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m)
192 TRAP_ENTRY(0x20, do_reg_access) BAD_TRAP(0x21) BAD_TRAP(0x22)
193 BAD_TRAP(0x23) TRAP_ENTRY(0x24, do_cp_disabled) SKIP_TRAP(0x25, unimp_flush)
194 BAD_TRAP(0x26) BAD_TRAP(0x27) TRAP_ENTRY(0x28, do_cp_exception)
195 SRMMU_DFAULT TRAP_ENTRY(0x2a, do_hw_divzero) BAD_TRAP(0x2b) BAD_TRAP(0x2c)
196 BAD_TRAP(0x2d) BAD_TRAP(0x2e) BAD_TRAP(0x2f) BAD_TRAP(0x30) BAD_TRAP(0x31)
197 BAD_TRAP(0x32) BAD_TRAP(0x33) BAD_TRAP(0x34) BAD_TRAP(0x35) BAD_TRAP(0x36)
198 BAD_TRAP(0x37) BAD_TRAP(0x38) BAD_TRAP(0x39) BAD_TRAP(0x3a) BAD_TRAP(0x3b)
199 BAD_TRAP(0x3c) BAD_TRAP(0x3d) BAD_TRAP(0x3e) BAD_TRAP(0x3f) BAD_TRAP(0x40)
200 BAD_TRAP(0x41) BAD_TRAP(0x42) BAD_TRAP(0x43) BAD_TRAP(0x44) BAD_TRAP(0x45)
201 BAD_TRAP(0x46) BAD_TRAP(0x47) BAD_TRAP(0x48) BAD_TRAP(0x49) BAD_TRAP(0x4a)
202 BAD_TRAP(0x4b) BAD_TRAP(0x4c) BAD_TRAP(0x4d) BAD_TRAP(0x4e) BAD_TRAP(0x4f)
203 BAD_TRAP(0x50)
204 BAD_TRAP(0x51) BAD_TRAP(0x52) BAD_TRAP(0x53) BAD_TRAP(0x54) BAD_TRAP(0x55)
205 BAD_TRAP(0x56) BAD_TRAP(0x57) BAD_TRAP(0x58) BAD_TRAP(0x59) BAD_TRAP(0x5a)
206 BAD_TRAP(0x5b) BAD_TRAP(0x5c) BAD_TRAP(0x5d) BAD_TRAP(0x5e) BAD_TRAP(0x5f)
207 BAD_TRAP(0x60) BAD_TRAP(0x61) BAD_TRAP(0x62) BAD_TRAP(0x63) BAD_TRAP(0x64)
208 BAD_TRAP(0x65) BAD_TRAP(0x66) BAD_TRAP(0x67) BAD_TRAP(0x68) BAD_TRAP(0x69)
209 BAD_TRAP(0x6a) BAD_TRAP(0x6b) BAD_TRAP(0x6c) BAD_TRAP(0x6d) BAD_TRAP(0x6e)
210 BAD_TRAP(0x6f) BAD_TRAP(0x70) BAD_TRAP(0x71) BAD_TRAP(0x72) BAD_TRAP(0x73)
211 BAD_TRAP(0x74) BAD_TRAP(0x75) BAD_TRAP(0x76) BAD_TRAP(0x77) BAD_TRAP(0x78)
212 BAD_TRAP(0x79) BAD_TRAP(0x7a) BAD_TRAP(0x7b) BAD_TRAP(0x7c) BAD_TRAP(0x7d)
213 BAD_TRAP(0x7e) BAD_TRAP(0x7f)
ec98c6b9 214 BAD_TRAP(0x80)
1da177e4
LT		 215 BREAKPOINT_TRAP
216 TRAP_ENTRY(0x82, do_hw_divzero)
217 TRAP_ENTRY(0x83, do_flush_windows) BAD_TRAP(0x84) BAD_TRAP(0x85)
ec98c6b9
DM		 218 BAD_TRAP(0x86) BAD_TRAP(0x87) BAD_TRAP(0x88)
219 BAD_TRAP(0x89) BAD_TRAP(0x8a) BAD_TRAP(0x8b) BAD_TRAP(0x8c)
1da177e4
LT		 220 BAD_TRAP(0x8d) BAD_TRAP(0x8e) BAD_TRAP(0x8f)
221 LINUX_SYSCALL_TRAP BAD_TRAP(0x91) BAD_TRAP(0x92) BAD_TRAP(0x93) BAD_TRAP(0x94)
222 BAD_TRAP(0x95) BAD_TRAP(0x96) BAD_TRAP(0x97) BAD_TRAP(0x98) BAD_TRAP(0x99)
223 BAD_TRAP(0x9a) BAD_TRAP(0x9b) BAD_TRAP(0x9c) BAD_TRAP(0x9d) BAD_TRAP(0x9e)
224 BAD_TRAP(0x9f) GETCC_TRAP SETCC_TRAP GETPSR_TRAP
225 BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6)
ec98c6b9 226 BAD_TRAP(0xa7) BAD_TRAP(0xa8) BAD_TRAP(0xa9) BAD_TRAP(0xaa) BAD_TRAP(0xab)
1da177e4
LT		 227 BAD_TRAP(0xac) BAD_TRAP(0xad) BAD_TRAP(0xae) BAD_TRAP(0xaf) BAD_TRAP(0xb0)
228 BAD_TRAP(0xb1) BAD_TRAP(0xb2) BAD_TRAP(0xb3) BAD_TRAP(0xb4) BAD_TRAP(0xb5)
229 BAD_TRAP(0xb6) BAD_TRAP(0xb7) BAD_TRAP(0xb8) BAD_TRAP(0xb9) BAD_TRAP(0xba)
230 BAD_TRAP(0xbb) BAD_TRAP(0xbc) BAD_TRAP(0xbd) BAD_TRAP(0xbe) BAD_TRAP(0xbf)
231 BAD_TRAP(0xc0) BAD_TRAP(0xc1) BAD_TRAP(0xc2) BAD_TRAP(0xc3) BAD_TRAP(0xc4)
232 BAD_TRAP(0xc5) BAD_TRAP(0xc6) BAD_TRAP(0xc7) BAD_TRAP(0xc8) BAD_TRAP(0xc9)
233 BAD_TRAP(0xca) BAD_TRAP(0xcb) BAD_TRAP(0xcc) BAD_TRAP(0xcd) BAD_TRAP(0xce)
234 BAD_TRAP(0xcf) BAD_TRAP(0xd0) BAD_TRAP(0xd1) BAD_TRAP(0xd2) BAD_TRAP(0xd3)
235 BAD_TRAP(0xd4) BAD_TRAP(0xd5) BAD_TRAP(0xd6) BAD_TRAP(0xd7) BAD_TRAP(0xd8)
236 BAD_TRAP(0xd9) BAD_TRAP(0xda) BAD_TRAP(0xdb) BAD_TRAP(0xdc) BAD_TRAP(0xdd)
237 BAD_TRAP(0xde) BAD_TRAP(0xdf) BAD_TRAP(0xe0) BAD_TRAP(0xe1) BAD_TRAP(0xe2)
238 BAD_TRAP(0xe3) BAD_TRAP(0xe4) BAD_TRAP(0xe5) BAD_TRAP(0xe6) BAD_TRAP(0xe7)
239 BAD_TRAP(0xe8) BAD_TRAP(0xe9) BAD_TRAP(0xea) BAD_TRAP(0xeb) BAD_TRAP(0xec)
240 BAD_TRAP(0xed) BAD_TRAP(0xee) BAD_TRAP(0xef) BAD_TRAP(0xf0) BAD_TRAP(0xf1)
241 BAD_TRAP(0xf2) BAD_TRAP(0xf3) BAD_TRAP(0xf4) BAD_TRAP(0xf5) BAD_TRAP(0xf6)
242 BAD_TRAP(0xf7) BAD_TRAP(0xf8) BAD_TRAP(0xf9) BAD_TRAP(0xfa) BAD_TRAP(0xfb)
e2fdd7fd 243 BAD_TRAP(0xfc) KGDB_TRAP(0xfd) BAD_TRAP(0xfe) BAD_TRAP(0xff)
1da177e4
LT		 244
245trapbase_cpu2:
246 BAD_TRAP(0x0) SRMMU_TFAULT TRAP_ENTRY(0x2, bad_instruction)
247 TRAP_ENTRY(0x3, priv_instruction) TRAP_ENTRY(0x4, fpd_trap_handler)
248 WINDOW_SPILL WINDOW_FILL TRAP_ENTRY(0x7, mna_handler)
249 TRAP_ENTRY(0x8, fpe_trap_handler) SRMMU_DFAULT
250 TRAP_ENTRY(0xa, do_tag_overflow) TRAP_ENTRY(0xb, do_watchpoint)
251 BAD_TRAP(0xc) BAD_TRAP(0xd) BAD_TRAP(0xe) BAD_TRAP(0xf) BAD_TRAP(0x10)
252 TRAP_ENTRY_INTERRUPT(1) TRAP_ENTRY_INTERRUPT(2)
253 TRAP_ENTRY_INTERRUPT(3) TRAP_ENTRY_INTERRUPT(4)
254 TRAP_ENTRY_INTERRUPT(5) TRAP_ENTRY_INTERRUPT(6)
255 TRAP_ENTRY_INTERRUPT(7) TRAP_ENTRY_INTERRUPT(8)
256 TRAP_ENTRY_INTERRUPT(9) TRAP_ENTRY_INTERRUPT(10)
257 TRAP_ENTRY_INTERRUPT(11) TRAP_ENTRY_INTERRUPT(12)
258 TRAP_ENTRY_INTERRUPT(13) TRAP_ENTRY_INTERRUPT(14)
259 TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m)
260 TRAP_ENTRY(0x20, do_reg_access) BAD_TRAP(0x21) BAD_TRAP(0x22)
261 BAD_TRAP(0x23) TRAP_ENTRY(0x24, do_cp_disabled) SKIP_TRAP(0x25, unimp_flush)
262 BAD_TRAP(0x26) BAD_TRAP(0x27) TRAP_ENTRY(0x28, do_cp_exception)
263 SRMMU_DFAULT TRAP_ENTRY(0x2a, do_hw_divzero) BAD_TRAP(0x2b) BAD_TRAP(0x2c)
264 BAD_TRAP(0x2d) BAD_TRAP(0x2e) BAD_TRAP(0x2f) BAD_TRAP(0x30) BAD_TRAP(0x31)
265 BAD_TRAP(0x32) BAD_TRAP(0x33) BAD_TRAP(0x34) BAD_TRAP(0x35) BAD_TRAP(0x36)
266 BAD_TRAP(0x37) BAD_TRAP(0x38) BAD_TRAP(0x39) BAD_TRAP(0x3a) BAD_TRAP(0x3b)
267 BAD_TRAP(0x3c) BAD_TRAP(0x3d) BAD_TRAP(0x3e) BAD_TRAP(0x3f) BAD_TRAP(0x40)
268 BAD_TRAP(0x41) BAD_TRAP(0x42) BAD_TRAP(0x43) BAD_TRAP(0x44) BAD_TRAP(0x45)
269 BAD_TRAP(0x46) BAD_TRAP(0x47) BAD_TRAP(0x48) BAD_TRAP(0x49) BAD_TRAP(0x4a)
270 BAD_TRAP(0x4b) BAD_TRAP(0x4c) BAD_TRAP(0x4d) BAD_TRAP(0x4e) BAD_TRAP(0x4f)
271 BAD_TRAP(0x50)
272 BAD_TRAP(0x51) BAD_TRAP(0x52) BAD_TRAP(0x53) BAD_TRAP(0x54) BAD_TRAP(0x55)
273 BAD_TRAP(0x56) BAD_TRAP(0x57) BAD_TRAP(0x58) BAD_TRAP(0x59) BAD_TRAP(0x5a)
274 BAD_TRAP(0x5b) BAD_TRAP(0x5c) BAD_TRAP(0x5d) BAD_TRAP(0x5e) BAD_TRAP(0x5f)
275 BAD_TRAP(0x60) BAD_TRAP(0x61) BAD_TRAP(0x62) BAD_TRAP(0x63) BAD_TRAP(0x64)
276 BAD_TRAP(0x65) BAD_TRAP(0x66) BAD_TRAP(0x67) BAD_TRAP(0x68) BAD_TRAP(0x69)
277 BAD_TRAP(0x6a) BAD_TRAP(0x6b) BAD_TRAP(0x6c) BAD_TRAP(0x6d) BAD_TRAP(0x6e)
278 BAD_TRAP(0x6f) BAD_TRAP(0x70) BAD_TRAP(0x71) BAD_TRAP(0x72) BAD_TRAP(0x73)
279 BAD_TRAP(0x74) BAD_TRAP(0x75) BAD_TRAP(0x76) BAD_TRAP(0x77) BAD_TRAP(0x78)
280 BAD_TRAP(0x79) BAD_TRAP(0x7a) BAD_TRAP(0x7b) BAD_TRAP(0x7c) BAD_TRAP(0x7d)
281 BAD_TRAP(0x7e) BAD_TRAP(0x7f)
ec98c6b9 282 BAD_TRAP(0x80)
1da177e4
LT		 283 BREAKPOINT_TRAP
284 TRAP_ENTRY(0x82, do_hw_divzero)
285 TRAP_ENTRY(0x83, do_flush_windows) BAD_TRAP(0x84) BAD_TRAP(0x85)
ec98c6b9
DM		 286 BAD_TRAP(0x86) BAD_TRAP(0x87) BAD_TRAP(0x88)
287 BAD_TRAP(0x89) BAD_TRAP(0x8a) BAD_TRAP(0x8b) BAD_TRAP(0x8c)
1da177e4
LT		 288 BAD_TRAP(0x8d) BAD_TRAP(0x8e) BAD_TRAP(0x8f)
289 LINUX_SYSCALL_TRAP BAD_TRAP(0x91) BAD_TRAP(0x92) BAD_TRAP(0x93) BAD_TRAP(0x94)
290 BAD_TRAP(0x95) BAD_TRAP(0x96) BAD_TRAP(0x97) BAD_TRAP(0x98) BAD_TRAP(0x99)
291 BAD_TRAP(0x9a) BAD_TRAP(0x9b) BAD_TRAP(0x9c) BAD_TRAP(0x9d) BAD_TRAP(0x9e)
292 BAD_TRAP(0x9f) GETCC_TRAP SETCC_TRAP GETPSR_TRAP
293 BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6)
ec98c6b9 294 BAD_TRAP(0xa7) BAD_TRAP(0xa8) BAD_TRAP(0xa9) BAD_TRAP(0xaa) BAD_TRAP(0xab)
1da177e4
LT		 295 BAD_TRAP(0xac) BAD_TRAP(0xad) BAD_TRAP(0xae) BAD_TRAP(0xaf) BAD_TRAP(0xb0)
296 BAD_TRAP(0xb1) BAD_TRAP(0xb2) BAD_TRAP(0xb3) BAD_TRAP(0xb4) BAD_TRAP(0xb5)
297 BAD_TRAP(0xb6) BAD_TRAP(0xb7) BAD_TRAP(0xb8) BAD_TRAP(0xb9) BAD_TRAP(0xba)
298 BAD_TRAP(0xbb) BAD_TRAP(0xbc) BAD_TRAP(0xbd) BAD_TRAP(0xbe) BAD_TRAP(0xbf)
299 BAD_TRAP(0xc0) BAD_TRAP(0xc1) BAD_TRAP(0xc2) BAD_TRAP(0xc3) BAD_TRAP(0xc4)
300 BAD_TRAP(0xc5) BAD_TRAP(0xc6) BAD_TRAP(0xc7) BAD_TRAP(0xc8) BAD_TRAP(0xc9)
301 BAD_TRAP(0xca) BAD_TRAP(0xcb) BAD_TRAP(0xcc) BAD_TRAP(0xcd) BAD_TRAP(0xce)
302 BAD_TRAP(0xcf) BAD_TRAP(0xd0) BAD_TRAP(0xd1) BAD_TRAP(0xd2) BAD_TRAP(0xd3)
303 BAD_TRAP(0xd4) BAD_TRAP(0xd5) BAD_TRAP(0xd6) BAD_TRAP(0xd7) BAD_TRAP(0xd8)
304 BAD_TRAP(0xd9) BAD_TRAP(0xda) BAD_TRAP(0xdb) BAD_TRAP(0xdc) BAD_TRAP(0xdd)
305 BAD_TRAP(0xde) BAD_TRAP(0xdf) BAD_TRAP(0xe0) BAD_TRAP(0xe1) BAD_TRAP(0xe2)
306 BAD_TRAP(0xe3) BAD_TRAP(0xe4) BAD_TRAP(0xe5) BAD_TRAP(0xe6) BAD_TRAP(0xe7)
307 BAD_TRAP(0xe8) BAD_TRAP(0xe9) BAD_TRAP(0xea) BAD_TRAP(0xeb) BAD_TRAP(0xec)
308 BAD_TRAP(0xed) BAD_TRAP(0xee) BAD_TRAP(0xef) BAD_TRAP(0xf0) BAD_TRAP(0xf1)
309 BAD_TRAP(0xf2) BAD_TRAP(0xf3) BAD_TRAP(0xf4) BAD_TRAP(0xf5) BAD_TRAP(0xf6)
310 BAD_TRAP(0xf7) BAD_TRAP(0xf8) BAD_TRAP(0xf9) BAD_TRAP(0xfa) BAD_TRAP(0xfb)
e2fdd7fd 311 BAD_TRAP(0xfc) KGDB_TRAP(0xfd) BAD_TRAP(0xfe) BAD_TRAP(0xff)
1da177e4
LT		 312
313trapbase_cpu3:
314 BAD_TRAP(0x0) SRMMU_TFAULT TRAP_ENTRY(0x2, bad_instruction)
315 TRAP_ENTRY(0x3, priv_instruction) TRAP_ENTRY(0x4, fpd_trap_handler)
316 WINDOW_SPILL WINDOW_FILL TRAP_ENTRY(0x7, mna_handler)
317 TRAP_ENTRY(0x8, fpe_trap_handler) SRMMU_DFAULT
318 TRAP_ENTRY(0xa, do_tag_overflow) TRAP_ENTRY(0xb, do_watchpoint)
319 BAD_TRAP(0xc) BAD_TRAP(0xd) BAD_TRAP(0xe) BAD_TRAP(0xf) BAD_TRAP(0x10)
320 TRAP_ENTRY_INTERRUPT(1) TRAP_ENTRY_INTERRUPT(2)
321 TRAP_ENTRY_INTERRUPT(3) TRAP_ENTRY_INTERRUPT(4)
322 TRAP_ENTRY_INTERRUPT(5) TRAP_ENTRY_INTERRUPT(6)
323 TRAP_ENTRY_INTERRUPT(7) TRAP_ENTRY_INTERRUPT(8)
324 TRAP_ENTRY_INTERRUPT(9) TRAP_ENTRY_INTERRUPT(10)
325 TRAP_ENTRY_INTERRUPT(11) TRAP_ENTRY_INTERRUPT(12)
326 TRAP_ENTRY_INTERRUPT(13) TRAP_ENTRY_INTERRUPT(14)
327 TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m)
328 TRAP_ENTRY(0x20, do_reg_access) BAD_TRAP(0x21) BAD_TRAP(0x22)
329 BAD_TRAP(0x23) TRAP_ENTRY(0x24, do_cp_disabled) SKIP_TRAP(0x25, unimp_flush)
330 BAD_TRAP(0x26) BAD_TRAP(0x27) TRAP_ENTRY(0x28, do_cp_exception)
331 SRMMU_DFAULT TRAP_ENTRY(0x2a, do_hw_divzero) BAD_TRAP(0x2b) BAD_TRAP(0x2c)
332 BAD_TRAP(0x2d) BAD_TRAP(0x2e) BAD_TRAP(0x2f) BAD_TRAP(0x30) BAD_TRAP(0x31)
333 BAD_TRAP(0x32) BAD_TRAP(0x33) BAD_TRAP(0x34) BAD_TRAP(0x35) BAD_TRAP(0x36)
334 BAD_TRAP(0x37) BAD_TRAP(0x38) BAD_TRAP(0x39) BAD_TRAP(0x3a) BAD_TRAP(0x3b)
335 BAD_TRAP(0x3c) BAD_TRAP(0x3d) BAD_TRAP(0x3e) BAD_TRAP(0x3f) BAD_TRAP(0x40)
336 BAD_TRAP(0x41) BAD_TRAP(0x42) BAD_TRAP(0x43) BAD_TRAP(0x44) BAD_TRAP(0x45)
337 BAD_TRAP(0x46) BAD_TRAP(0x47) BAD_TRAP(0x48) BAD_TRAP(0x49) BAD_TRAP(0x4a)
338 BAD_TRAP(0x4b) BAD_TRAP(0x4c) BAD_TRAP(0x4d) BAD_TRAP(0x4e) BAD_TRAP(0x4f)
339 BAD_TRAP(0x50)
340 BAD_TRAP(0x51) BAD_TRAP(0x52) BAD_TRAP(0x53) BAD_TRAP(0x54) BAD_TRAP(0x55)
341 BAD_TRAP(0x56) BAD_TRAP(0x57) BAD_TRAP(0x58) BAD_TRAP(0x59) BAD_TRAP(0x5a)
342 BAD_TRAP(0x5b) BAD_TRAP(0x5c) BAD_TRAP(0x5d) BAD_TRAP(0x5e) BAD_TRAP(0x5f)
343 BAD_TRAP(0x60) BAD_TRAP(0x61) BAD_TRAP(0x62) BAD_TRAP(0x63) BAD_TRAP(0x64)
344 BAD_TRAP(0x65) BAD_TRAP(0x66) BAD_TRAP(0x67) BAD_TRAP(0x68) BAD_TRAP(0x69)
345 BAD_TRAP(0x6a) BAD_TRAP(0x6b) BAD_TRAP(0x6c) BAD_TRAP(0x6d) BAD_TRAP(0x6e)
346 BAD_TRAP(0x6f) BAD_TRAP(0x70) BAD_TRAP(0x71) BAD_TRAP(0x72) BAD_TRAP(0x73)
347 BAD_TRAP(0x74) BAD_TRAP(0x75) BAD_TRAP(0x76) BAD_TRAP(0x77) BAD_TRAP(0x78)
348 BAD_TRAP(0x79) BAD_TRAP(0x7a) BAD_TRAP(0x7b) BAD_TRAP(0x7c) BAD_TRAP(0x7d)
349 BAD_TRAP(0x7e) BAD_TRAP(0x7f)
ec98c6b9 350 BAD_TRAP(0x80)
1da177e4
LT		 351 BREAKPOINT_TRAP
352 TRAP_ENTRY(0x82, do_hw_divzero)
353 TRAP_ENTRY(0x83, do_flush_windows) BAD_TRAP(0x84) BAD_TRAP(0x85)
ec98c6b9
DM		 354 BAD_TRAP(0x86) BAD_TRAP(0x87) BAD_TRAP(0x88)
355 BAD_TRAP(0x89) BAD_TRAP(0x8a) BAD_TRAP(0x8b) BAD_TRAP(0x8c)
1da177e4
LT		 356 BAD_TRAP(0x8d) BAD_TRAP(0x8e) BAD_TRAP(0x8f)
357 LINUX_SYSCALL_TRAP BAD_TRAP(0x91) BAD_TRAP(0x92) BAD_TRAP(0x93) BAD_TRAP(0x94)
358 BAD_TRAP(0x95) BAD_TRAP(0x96) BAD_TRAP(0x97) BAD_TRAP(0x98) BAD_TRAP(0x99)
359 BAD_TRAP(0x9a) BAD_TRAP(0x9b) BAD_TRAP(0x9c) BAD_TRAP(0x9d) BAD_TRAP(0x9e)
360 BAD_TRAP(0x9f) GETCC_TRAP SETCC_TRAP GETPSR_TRAP
361 BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6)
ec98c6b9 362 BAD_TRAP(0xa7) BAD_TRAP(0xa8) BAD_TRAP(0xa9) BAD_TRAP(0xaa) BAD_TRAP(0xab)
1da177e4
LT		 363 BAD_TRAP(0xac) BAD_TRAP(0xad) BAD_TRAP(0xae) BAD_TRAP(0xaf) BAD_TRAP(0xb0)
364 BAD_TRAP(0xb1) BAD_TRAP(0xb2) BAD_TRAP(0xb3) BAD_TRAP(0xb4) BAD_TRAP(0xb5)
365 BAD_TRAP(0xb6) BAD_TRAP(0xb7) BAD_TRAP(0xb8) BAD_TRAP(0xb9) BAD_TRAP(0xba)
366 BAD_TRAP(0xbb) BAD_TRAP(0xbc) BAD_TRAP(0xbd) BAD_TRAP(0xbe) BAD_TRAP(0xbf)
367 BAD_TRAP(0xc0) BAD_TRAP(0xc1) BAD_TRAP(0xc2) BAD_TRAP(0xc3) BAD_TRAP(0xc4)
368 BAD_TRAP(0xc5) BAD_TRAP(0xc6) BAD_TRAP(0xc7) BAD_TRAP(0xc8) BAD_TRAP(0xc9)
369 BAD_TRAP(0xca) BAD_TRAP(0xcb) BAD_TRAP(0xcc) BAD_TRAP(0xcd) BAD_TRAP(0xce)
370 BAD_TRAP(0xcf) BAD_TRAP(0xd0) BAD_TRAP(0xd1) BAD_TRAP(0xd2) BAD_TRAP(0xd3)
371 BAD_TRAP(0xd4) BAD_TRAP(0xd5) BAD_TRAP(0xd6) BAD_TRAP(0xd7) BAD_TRAP(0xd8)
372 BAD_TRAP(0xd9) BAD_TRAP(0xda) BAD_TRAP(0xdb) BAD_TRAP(0xdc) BAD_TRAP(0xdd)
373 BAD_TRAP(0xde) BAD_TRAP(0xdf) BAD_TRAP(0xe0) BAD_TRAP(0xe1) BAD_TRAP(0xe2)
374 BAD_TRAP(0xe3) BAD_TRAP(0xe4) BAD_TRAP(0xe5) BAD_TRAP(0xe6) BAD_TRAP(0xe7)
375 BAD_TRAP(0xe8) BAD_TRAP(0xe9) BAD_TRAP(0xea) BAD_TRAP(0xeb) BAD_TRAP(0xec)
376 BAD_TRAP(0xed) BAD_TRAP(0xee) BAD_TRAP(0xef) BAD_TRAP(0xf0) BAD_TRAP(0xf1)
377 BAD_TRAP(0xf2) BAD_TRAP(0xf3) BAD_TRAP(0xf4) BAD_TRAP(0xf5) BAD_TRAP(0xf6)
378 BAD_TRAP(0xf7) BAD_TRAP(0xf8) BAD_TRAP(0xf9) BAD_TRAP(0xfa) BAD_TRAP(0xfb)
e2fdd7fd 379 BAD_TRAP(0xfc) KGDB_TRAP(0xfd) BAD_TRAP(0xfe) BAD_TRAP(0xff)
1da177e4
LT		 380
381#endif
382 .align PAGE_SIZE
383
384/* This was the only reasonable way I could think of to properly align
385 * these page-table data structures.
386 */
1da177e4
LT		 387 .globl swapper_pg_dir
388swapper_pg_dir: .skip PAGE_SIZE
1b4cb70e 389 .globl empty_zero_page
1da177e4
LT		 390empty_zero_page: .skip PAGE_SIZE
391
392 .global root_flags
393 .global ram_flags
394 .global root_dev
395 .global sparc_ramdisk_image
396 .global sparc_ramdisk_size
397
398/* This stuff has to be in sync with SILO and other potential boot loaders
399 * Fields should be kept upward compatible and whenever any change is made,
400 * HdrS version should be incremented.
401 */
402 .ascii "HdrS"
403 .word LINUX_VERSION_CODE
404 .half 0x0203 /* HdrS version */
405root_flags:
406 .half 1
407root_dev:
408 .half 0
409ram_flags:
410 .half 0
411sparc_ramdisk_image:
412 .word 0
413sparc_ramdisk_size:
414 .word 0
415 .word reboot_command
416 .word 0, 0, 0
417 .word _end
418
419/* Cool, here we go. Pick up the romvec pointer in %o0 and stash it in
420 * %g7 and at prom_vector_p. And also quickly check whether we are on
421 * a v0, v2, or v3 prom.
422 */
423gokernel:
424 /* Ok, it's nice to know, as early as possible, if we
425 * are already mapped where we expect to be in virtual
426 * memory. The Solaris /boot elf format bootloader
427 * will peek into our elf header and load us where
428 * we want to be, otherwise we have to re-map.
429 *
430 * Some boot loaders don't place the jmp'rs address
431 * in %o7, so we do a pc-relative call to a local
432 * label, then see what %o7 has.
433 */
434
435 mov %o7, %g4 ! Save %o7
436
437 /* Jump to it, and pray... */
438current_pc:
439 call 1f
440 nop
441
4421:
443 mov %o7, %g3
444
445 tst %o0
446 be no_sun4u_here
447 mov %g4, %o7 /* Previous %o7. */
448
449 mov %o0, %l0 ! stash away romvec
450 mov %o0, %g7 ! put it here too
451 mov %o1, %l1 ! stash away debug_vec too
452
453 /* Ok, let's check out our run time program counter. */
454 set current_pc, %g5
455 cmp %g3, %g5
456 be already_mapped
457 nop
458
459 /* %l6 will hold the offset we have to subtract
460 * from absolute symbols in order to access areas
461 * in our own image. If already mapped this is
462 * just plain zero, else it is KERNBASE.
463 */
464 set KERNBASE, %l6
465 b copy_prom_lvl14
466 nop
467
468already_mapped:
469 mov 0, %l6
470
471 /* Copy over the Prom's level 14 clock handler. */
472copy_prom_lvl14:
473#if 1
474 /* DJHR
475 * preserve our linked/calculated instructions
476 */
477 set lvl14_save, %g1
478 set t_irq14, %g3
479 sub %g1, %l6, %g1 ! translate to physical
480 sub %g3, %l6, %g3 ! translate to physical
481 ldd [%g3], %g4
482 std %g4, [%g1]
483 ldd [%g3+8], %g4
484 std %g4, [%g1+8]
485#endif
486 rd %tbr, %g1
487 andn %g1, 0xfff, %g1 ! proms trap table base
488 or %g0, (0x1e<<4), %g2 ! offset to lvl14 intr
489 or %g1, %g2, %g2
490 set t_irq14, %g3
491 sub %g3, %l6, %g3
492 ldd [%g2], %g4
493 std %g4, [%g3]
494 ldd [%g2 + 0x8], %g4
495 std %g4, [%g3 + 0x8] ! Copy proms handler
496
323206a1
SR		 497/* DON'T TOUCH %l0 thru %l5 in these remapping routines,
498 * we need their values afterwards!
1da177e4 499 */
323206a1 500
1da177e4
LT		 501 /* Now check whether we are already mapped, if we
502 * are we can skip all this garbage coming up.
503 */
504copy_prom_done:
505 cmp %l6, 0
506 be go_to_highmem ! this will be a nop then
507 nop
508
9b4c514a
DM		 509 /* Validate that we are in fact running on an
510 * SRMMU based cpu.
511 */
512 set 0x4000, %g6
513 cmp %g7, %g6
514 bne not_a_sun4
515 nop
516
517halt_sun4_or_sun4c:
518 ld [%g7 + 0x68], %o1
519 set sun4c_notsup, %o0
520 sub %o0, %l6, %o0
521 call %o1
522 nop
523 ba halt_me
524 nop
525
526not_a_sun4:
527 lda [%g0] ASI_M_MMUREGS, %g1
528 andcc %g1, 1, %g0
529 be halt_sun4_or_sun4c
530 nop
531
1da177e4
LT		 532srmmu_remap:
533 /* First, check for a viking (TI) module. */
534 set 0x40000000, %g2
535 rd %psr, %g3
536 and %g2, %g3, %g3
537 subcc %g3, 0x0, %g0
538 bz srmmu_nviking
539 nop
540
541 /* Figure out what kind of viking we are on.
542 * We need to know if we have to play with the
543 * AC bit and disable traps or not.
544 */
545
546 /* I've only seen MicroSparc's on SparcClassics with this
547 * bit set.
548 */
549 set 0x800, %g2
550 lda [%g0] ASI_M_MMUREGS, %g3 ! peek in the control reg
551 and %g2, %g3, %g3
552 subcc %g3, 0x0, %g0
553 bnz srmmu_nviking ! is in mbus mode
554 nop
555
556 rd %psr, %g3 ! DO NOT TOUCH %g3
557 andn %g3, PSR_ET, %g2
558 wr %g2, 0x0, %psr
559 WRITE_PAUSE
560
561 /* Get context table pointer, then convert to
562 * a physical address, which is 36 bits.
563 */
564 set AC_M_CTPR, %g4
565 lda [%g4] ASI_M_MMUREGS, %g4
566 sll %g4, 0x4, %g4 ! We use this below
567 ! DO NOT TOUCH %g4
568
569 /* Set the AC bit in the Viking's MMU control reg. */
570 lda [%g0] ASI_M_MMUREGS, %g5 ! DO NOT TOUCH %g5
571 set 0x8000, %g6 ! AC bit mask
572 or %g5, %g6, %g6 ! Or it in...
573 sta %g6, [%g0] ASI_M_MMUREGS ! Close your eyes...
574
575 /* Grrr, why does it seem like every other load/store
576 * on the sun4m is in some ASI space...
577 * Fine with me, let's get the pointer to the level 1
578 * page table directory and fetch its entry.
579 */
580 lda [%g4] ASI_M_BYPASS, %o1 ! This is a level 1 ptr
581 srl %o1, 0x4, %o1 ! Clear low 4 bits
582 sll %o1, 0x8, %o1 ! Make physical
583
584 /* Ok, pull in the PTD. */
585 lda [%o1] ASI_M_BYPASS, %o2 ! This is the 0x0 16MB pgd
586
587 /* Calculate to KERNBASE entry. */
588 add %o1, KERNBASE >> (SRMMU_PGDIR_SHIFT - 2), %o3
589
590 /* Poke the entry into the calculated address. */
591 sta %o2, [%o3] ASI_M_BYPASS
592
593 /* I don't get it Sun, if you engineered all these
594 * boot loaders and the PROM (thank you for the debugging
595 * features btw) why did you not have them load kernel
596 * images up in high address space, since this is necessary
597 * for ABI compliance anyways? Does this low-mapping provide
598 * enhanced interoperability?
599 *
600 * "The PROM is the computer."
601 */
602
603 /* Ok, restore the MMU control register we saved in %g5 */
604 sta %g5, [%g0] ASI_M_MMUREGS ! POW... ouch
605
606 /* Turn traps back on. We saved it in %g3 earlier. */
607 wr %g3, 0x0, %psr ! tick tock, tick tock
608
609 /* Now we burn precious CPU cycles due to bad engineering. */
610 WRITE_PAUSE
611
612 /* Wow, all that just to move a 32-bit value from one
613 * place to another... Jump to high memory.
614 */
615 b go_to_highmem
616 nop
617
618 /* This works on viking's in Mbus mode and all
619 * other MBUS modules. It is virtually the same as
620 * the above madness sans turning traps off and flipping
621 * the AC bit.
622 */
623srmmu_nviking:
624 set AC_M_CTPR, %g1
625 lda [%g1] ASI_M_MMUREGS, %g1 ! get ctx table ptr
626 sll %g1, 0x4, %g1 ! make physical addr
627 lda [%g1] ASI_M_BYPASS, %g1 ! ptr to level 1 pg_table
628 srl %g1, 0x4, %g1
629 sll %g1, 0x8, %g1 ! make phys addr for l1 tbl
630
631 lda [%g1] ASI_M_BYPASS, %g2 ! get level1 entry for 0x0
632 add %g1, KERNBASE >> (SRMMU_PGDIR_SHIFT - 2), %g3
633 sta %g2, [%g3] ASI_M_BYPASS ! place at KERNBASE entry
634 b go_to_highmem
635 nop ! wheee....
636
1da177e4
LT		 637
638/* Now do a non-relative jump so that PC is in high-memory */
639go_to_highmem:
640 set execute_in_high_mem, %g1
641 jmpl %g1, %g0
642 nop
643
644/* The code above should be at beginning and we have to take care about
a0871e8c 645 * short jumps, as branching to .init.text section from .text is usually
1da177e4
LT		 646 * impossible */
647 __INIT
648/* Acquire boot time privileged register values, this will help debugging.
649 * I figure out and store nwindows and nwindowsm1 later on.
650 */
651execute_in_high_mem:
652 mov %l0, %o0 ! put back romvec
653 mov %l1, %o1 ! and debug_vec
654
655 sethi %hi(prom_vector_p), %g1
656 st %o0, [%g1 + %lo(prom_vector_p)]
657
658 sethi %hi(linux_dbvec), %g1
659 st %o1, [%g1 + %lo(linux_dbvec)]
660
1da177e4
LT		 661/* Get the machine type via the mysterious romvec node operations. */
662
eb06f476 663 add %g7, 0x1c, %l1
1da177e4
LT		 664 ld [%l1], %l0
665 ld [%l0], %l0
eb06f476 666 call %l0
1da177e4
LT		 667 or %g0, %g0, %o0 ! next_node(0) = first_node
668 or %o0, %g0, %g6
669
670 sethi %hi(cputypvar), %o1 ! First node has cpu-arch
671 or %o1, %lo(cputypvar), %o1
672 sethi %hi(cputypval), %o2 ! information, the string
673 or %o2, %lo(cputypval), %o2
eb06f476 674 ld [%l1], %l0 ! 'compatible' tells
1da177e4 675 ld [%l0 + 0xc], %l0 ! that we want 'sun4x' where
eb06f476
SR		 676 call %l0 ! x is one of 'm', 'd' or 'e'.
677 nop ! %o2 holds pointer
1da177e4
LT		 678 ! to a buf where above string
679 ! will get stored by the prom.
680
0fd7ef1f
KE		 681#ifdef CONFIG_SPARC_LEON
682 /* no cpu-type check is needed, it is a SPARC-LEON */
8401707f 683
01dae0f0 684 sethi %hi(boot_cpu_id), %g2 ! boot-cpu index
8401707f 685
01dae0f0
DH		 686#ifdef CONFIG_SMP
687 ldub [%g2 + %lo(boot_cpu_id)], %g1
688 cmp %g1, 0xff ! unset means first CPU
689 bne leon_smp_cpu_startup ! continue only with master
690 nop
691#endif
692 /* Get CPU-ID from most significant 4-bit of ASR17 */
693 rd %asr17, %g1
694 srl %g1, 28, %g1
8401707f 695
01dae0f0
DH		 696 /* Update boot_cpu_id only on boot cpu */
697 stub %g1, [%g2 + %lo(boot_cpu_id)]
8401707f 698
323206a1 699 ba continue_boot
0fd7ef1f
KE		 700 nop
701#endif
d6ea5573
SR		 702
703/* Check to cputype. We may be booted on a sun4u (64 bit box),
704 * and sun4d needs special treatment.
705 */
706
1da177e4
LT		 707 set cputypval, %o2
708 ldub [%o2 + 0x4], %l1
709
d6ea5573
SR		 710 cmp %l1, 'm'
711 be sun4m_init
1da177e4 712 cmp %l1, 's'
d6ea5573 713 be sun4m_init
1da177e4 714 cmp %l1, 'd'
d6ea5573 715 be sun4d_init
1da177e4
LT		 716 cmp %l1, 'e'
717 be no_sun4e_here ! Could be a sun4e.
718 nop
719 b no_sun4u_here ! AIEEE, a V9 sun4u... Get our BIG BROTHER kernel :))
720 nop
721
1da177e4
LT		 722/* CPUID in bootbus can be found at PA 0xff0140000 */
723#define SUN4D_BOOTBUS_CPUID 0xf0140000
724
725sun4d_init:
726 /* Need to patch call to handler_irq */
727 set patch_handler_irq, %g4
728 set sun4d_handler_irq, %g5
729 sethi %hi(0x40000000), %g3 ! call
730 sub %g5, %g4, %g5
731 srl %g5, 2, %g5
732 or %g5, %g3, %g5
733 st %g5, [%g4]
734
735#ifdef CONFIG_SMP
736 /* Get our CPU id out of bootbus */
737 set SUN4D_BOOTBUS_CPUID, %g3
738 lduba [%g3] ASI_M_CTL, %g3
739 and %g3, 0xf8, %g3
740 srl %g3, 3, %g4
741 sta %g4, [%g0] ASI_M_VIKING_TMP1
742 sethi %hi(boot_cpu_id), %g5
743 stb %g4, [%g5 + %lo(boot_cpu_id)]
1da177e4
LT		 744#endif
745
746 /* Fall through to sun4m_init */
747
748sun4m_init:
1da177e4
LT		 749/* Ok, the PROM could have done funny things and apple cider could still
750 * be sitting in the fault status/address registers. Read them all to
751 * clear them so we don't get magic faults later on.
752 */
753/* This sucks, apparently this makes Vikings call prom panic, will fix later */
7542:
755 rd %psr, %o1
756 srl %o1, 28, %o1 ! Get a type of the CPU
757
758 subcc %o1, 4, %g0 ! TI: Viking or MicroSPARC
323206a1 759 be continue_boot
1da177e4
LT		 760 nop
761
762 set AC_M_SFSR, %o0
763 lda [%o0] ASI_M_MMUREGS, %g0
764 set AC_M_SFAR, %o0
765 lda [%o0] ASI_M_MMUREGS, %g0
766
767 /* Fujitsu MicroSPARC-II has no asynchronous flavors of FARs */
768 subcc %o1, 0, %g0
323206a1 769 be continue_boot
1da177e4
LT		 770 nop
771
772 set AC_M_AFSR, %o0
773 lda [%o0] ASI_M_MMUREGS, %g0
774 set AC_M_AFAR, %o0
775 lda [%o0] ASI_M_MMUREGS, %g0
776 nop
777
778
323206a1 779continue_boot:
1da177e4
LT		 780
781/* Aieee, now set PC and nPC, enable traps, give ourselves a stack and it's
782 * show-time!
783 */
784
785 sethi %hi(cputyp), %o0
786 st %g4, [%o0 + %lo(cputyp)]
787
788 /* Turn on Supervisor, EnableFloating, and all the PIL bits.
789 * Also puts us in register window zero with traps off.
790 */
791 set (PSR_PS | PSR_S | PSR_PIL | PSR_EF), %g2
792 wr %g2, 0x0, %psr
793 WRITE_PAUSE
794
795 /* I want a kernel stack NOW! */
796 set init_thread_union, %g1
797 set (THREAD_SIZE - STACKFRAME_SZ), %g2
798 add %g1, %g2, %sp
799 mov 0, %fp /* And for good luck */
800
801 /* Zero out our BSS section. */
802 set __bss_start , %o0 ! First address of BSS
86ed40bd 803 set _end , %o1 ! Last address of BSS
1da177e4
LT		 804 add %o0, 0x1, %o0
8051:
806 stb %g0, [%o0]
807 subcc %o0, %o1, %g0
808 bl 1b
809 add %o0, 0x1, %o0
810
5fcafb7a
DH		 811 /* If boot_cpu_id has not been setup by machine specific
812 * init-code above we default it to zero.
813 */
814 sethi %hi(boot_cpu_id), %g2
815 ldub [%g2 + %lo(boot_cpu_id)], %g3
816 cmp %g3, 0xff
817 bne 1f
818 nop
819 mov %g0, %g3
820 stub %g3, [%g2 + %lo(boot_cpu_id)]
821
837ebf0e 8221: sll %g3, 2, %g3
5fcafb7a 823
1da177e4
LT		 824 /* Initialize the uwinmask value for init task just in case.
825 * But first make current_set[boot_cpu_id] point to something useful.
826 */
827 set init_thread_union, %g6
828 set current_set, %g2
829#ifdef CONFIG_SMP
1da177e4
LT		 830 st %g6, [%g2]
831 add %g2, %g3, %g2
832#endif
833 st %g6, [%g2]
834
835 st %g0, [%g6 + TI_UWINMASK]
836
837/* Compute NWINDOWS and stash it away. Now uses %wim trick explained
838 * in the V8 manual. Ok, this method seems to work, Sparc is cool...
839 * No, it doesn't work, have to play the save/readCWP/restore trick.
840 */
841
842 wr %g0, 0x0, %wim ! so we do not get a trap
843 WRITE_PAUSE
844
845 save
846
847 rd %psr, %g3
848
849 restore
850
851 and %g3, 0x1f, %g3
852 add %g3, 0x1, %g3
853
854 mov 2, %g1
855 wr %g1, 0x0, %wim ! make window 1 invalid
856 WRITE_PAUSE
857
858 cmp %g3, 0x7
859 bne 2f
860 nop
861
862 /* Adjust our window handling routines to
863 * do things correctly on 7 window Sparcs.
864 */
865
866#define PATCH_INSN(src, dest) \
867 set src, %g5; \
868 set dest, %g2; \
869 ld [%g5], %g4; \
870 st %g4, [%g2];
871
872 /* Patch for window spills... */
873 PATCH_INSN(spnwin_patch1_7win, spnwin_patch1)
874 PATCH_INSN(spnwin_patch2_7win, spnwin_patch2)
875 PATCH_INSN(spnwin_patch3_7win, spnwin_patch3)
876
877 /* Patch for window fills... */
878 PATCH_INSN(fnwin_patch1_7win, fnwin_patch1)
879 PATCH_INSN(fnwin_patch2_7win, fnwin_patch2)
880
881 /* Patch for trap entry setup... */
882 PATCH_INSN(tsetup_7win_patch1, tsetup_patch1)
883 PATCH_INSN(tsetup_7win_patch2, tsetup_patch2)
884 PATCH_INSN(tsetup_7win_patch3, tsetup_patch3)
885 PATCH_INSN(tsetup_7win_patch4, tsetup_patch4)
886 PATCH_INSN(tsetup_7win_patch5, tsetup_patch5)
887 PATCH_INSN(tsetup_7win_patch6, tsetup_patch6)
888
889 /* Patch for returning from traps... */
890 PATCH_INSN(rtrap_7win_patch1, rtrap_patch1)
891 PATCH_INSN(rtrap_7win_patch2, rtrap_patch2)
892 PATCH_INSN(rtrap_7win_patch3, rtrap_patch3)
893 PATCH_INSN(rtrap_7win_patch4, rtrap_patch4)
894 PATCH_INSN(rtrap_7win_patch5, rtrap_patch5)
895
896 /* Patch for killing user windows from the register file. */
897 PATCH_INSN(kuw_patch1_7win, kuw_patch1)
898
899 /* Now patch the kernel window flush sequences.
900 * This saves 2 traps on every switch and fork.
901 */
902 set 0x01000000, %g4
903 set flush_patch_one, %g5
904 st %g4, [%g5 + 0x18]
905 st %g4, [%g5 + 0x1c]
906 set flush_patch_two, %g5
907 st %g4, [%g5 + 0x18]
908 st %g4, [%g5 + 0x1c]
909 set flush_patch_three, %g5
910 st %g4, [%g5 + 0x18]
911 st %g4, [%g5 + 0x1c]
912 set flush_patch_four, %g5
913 st %g4, [%g5 + 0x18]
914 st %g4, [%g5 + 0x1c]
915 set flush_patch_exception, %g5
916 st %g4, [%g5 + 0x18]
917 st %g4, [%g5 + 0x1c]
918 set flush_patch_switch, %g5
919 st %g4, [%g5 + 0x18]
920 st %g4, [%g5 + 0x1c]
921
9222:
923 sethi %hi(nwindows), %g4
924 st %g3, [%g4 + %lo(nwindows)] ! store final value
925 sub %g3, 0x1, %g3
926 sethi %hi(nwindowsm1), %g4
927 st %g3, [%g4 + %lo(nwindowsm1)]
928
929 /* Here we go, start using Linux's trap table... */
930 set trapbase, %g3
931 wr %g3, 0x0, %tbr
932 WRITE_PAUSE
933
934 /* Finally, turn on traps so that we can call c-code. */
935 rd %psr, %g3
936 wr %g3, 0x0, %psr
937 WRITE_PAUSE
938
939 wr %g3, PSR_ET, %psr
940 WRITE_PAUSE
941
942 /* First we call prom_init() to set up PROMLIB, then
943 * off to start_kernel().
944 */
945
946 sethi %hi(prom_vector_p), %g5
947 ld [%g5 + %lo(prom_vector_p)], %o0
948 call prom_init
949 nop
950
951 call start_kernel
952 nop
953
954 /* We should not get here. */
955 call halt_me
956 nop
5110bd21 957
1da177e4
LT		 958no_sun4e_here:
959 ld [%g7 + 0x68], %o1
960 set sun4e_notsup, %o0
961 call %o1
962 nop
963 b halt_me
964 nop
965
966 __INITDATA
967
968sun4u_1:
969 .asciz "finddevice"
970 .align 4
971sun4u_2:
972 .asciz "/chosen"
973 .align 4
974sun4u_3:
975 .asciz "getprop"
976 .align 4
977sun4u_4:
978 .asciz "stdout"
979 .align 4
980sun4u_5:
981 .asciz "write"
982 .align 4
983sun4u_6:
984 .asciz "\n\rOn sun4u you have to use UltraLinux (64bit) kernel\n\rand not a 32bit sun4[cdem] version\n\r\n\r"
985sun4u_6e:
986 .align 4
987sun4u_7:
988 .asciz "exit"
989 .align 8
990sun4u_a1:
991 .word 0, sun4u_1, 0, 1, 0, 1, 0, sun4u_2, 0
992sun4u_r1:
993 .word 0
994sun4u_a2:
995 .word 0, sun4u_3, 0, 4, 0, 1, 0
996sun4u_i2:
997 .word 0, 0, sun4u_4, 0, sun4u_1, 0, 8, 0
998sun4u_r2:
999 .word 0
1000sun4u_a3:
1001 .word 0, sun4u_5, 0, 3, 0, 1, 0
1002sun4u_i3:
1003 .word 0, 0, sun4u_6, 0, sun4u_6e - sun4u_6 - 1, 0
1004sun4u_r3:
1005 .word 0
1006sun4u_a4:
1007 .word 0, sun4u_7, 0, 0, 0, 0
1008sun4u_r4:
1009
1010 __INIT
1011no_sun4u_here:
1012 set sun4u_a1, %o0
1013 set current_pc, %l2
1014 cmp %l2, %g3
1015 be 1f
1016 mov %o4, %l0
1017 sub %g3, %l2, %l6
1018 add %o0, %l6, %o0
1019 mov %o0, %l4
1020 mov sun4u_r4 - sun4u_a1, %l3
1021 ld [%l4], %l5
10222:
1023 add %l4, 4, %l4
1024 cmp %l5, %l2
1025 add %l5, %l6, %l5
1026 bgeu,a 3f
1027 st %l5, [%l4 - 4]
10283:
1029 subcc %l3, 4, %l3
1030 bne 2b
1031 ld [%l4], %l5
10321:
1033 call %l0
1034 mov %o0, %l1
1035
1036 ld [%l1 + (sun4u_r1 - sun4u_a1)], %o1
1037 add %l1, (sun4u_a2 - sun4u_a1), %o0
1038 call %l0
1039 st %o1, [%o0 + (sun4u_i2 - sun4u_a2)]
1040
1041 ld [%l1 + (sun4u_1 - sun4u_a1)], %o1
1042 add %l1, (sun4u_a3 - sun4u_a1), %o0
1043 call %l0
1044 st %o1, [%o0 + (sun4u_i3 - sun4u_a3)]
1045
1046 call %l0
1047 add %l1, (sun4u_a4 - sun4u_a1), %o0
1048
1049 /* Not reached */
1050halt_me:
1051 ld [%g7 + 0x74], %o0
1052 call %o0 ! Get us out of here...
1053 nop ! Apparently Solaris is better.
1054
1055/* Ok, now we continue in the .data/.text sections */
1056
1057 .data
1058 .align 4
1059
1060/*
1061 * Fill up the prom vector, note in particular the kind first element,
1062 * no joke. I don't need all of them in here as the entire prom vector
1063 * gets initialized in c-code so all routines can use it.
1064 */
1065
1da177e4
LT		 1066prom_vector_p:
1067 .word 0
1068
1069/* We calculate the following at boot time, window fills/spills and trap entry
1070 * code uses these to keep track of the register windows.
1071 */
1072
1073 .align 4
1074 .globl nwindows
1075 .globl nwindowsm1
1076nwindows:
1077 .word 8
1078nwindowsm1:
1079 .word 7
1080
1081/* Boot time debugger vector value. We need this later on. */
1082
1083 .align 4
1084 .globl linux_dbvec
1085linux_dbvec:
1086 .word 0
1087 .word 0
1088
1089 .align 8
1090
1091 .globl lvl14_save
1092lvl14_save:
1093 .word 0
1094 .word 0
1095 .word 0
1096 .word 0
1097 .word t_irq14
1098
1099 .section ".fixup",#alloc,#execinstr
1100 .globl __ret_efault
1101__ret_efault:
1102 ret
1103 restore %g0, -EFAULT, %o0
Linux 6.x block layer and io_uring tree(s)