/* * head.S: The initial boot code for the Sparc port of Linux. * * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) * Copyright (C) 1995,1999 Pete Zaitcev (zaitcev@yahoo.com) * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx) * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) * Copyright (C) 1997 Michael A. Griffith (grif@acm.org) * * CompactPCI platform by Eric Brower, 1999. */ #include <linux/version.h> #include <linux/init.h> #include <asm/head.h> #include <asm/asi.h> #include <asm/contregs.h> #include <asm/ptrace.h> #include <asm/psr.h> #include <asm/page.h> #include <asm/kdebug.h> #include <asm/winmacro.h> #include <asm/thread_info.h> /* TI_UWINMASK */ #include <asm/errno.h> #include <asm/pgtsrmmu.h> /* SRMMU_PGDIR_SHIFT */ .data /* * The following are used with the prom_vector node-ops to figure out * the cpu-type */ .align 4 cputyp: .word 1 .align 4 .globl cputypval cputypval: .asciz "sun4c" .ascii " " cputypvalend: cputypvallen = cputypvar - cputypval .align 4 /* * Sun people can't spell worth damn. "compatability" indeed. * At least we *know* we can't spell, and use a spell-checker. */ /* Uh, actually Linus it is I who cannot spell. Too much murky * Sparc assembly will do this to ya. */ cputypvar: .asciz "compatability" /* Tested on SS-5, SS-10. Probably someone at Sun applied a spell-checker. */ .align 4 cputypvar_sun4m: .asciz "compatible" .align 4 sun4_notsup: .asciz "Sparc-Linux sun4 support does no longer exist.\n\n" .align 4 sun4e_notsup: .asciz "Sparc-Linux sun4e support does not exist\n\n" .align 4 /* The Sparc trap table, bootloader gives us control at _start. */ .text .globl start, _stext, _start, __stext .globl trapbase _start: /* danger danger */ __stext: _stext: start: trapbase: #ifdef CONFIG_SMP trapbase_cpu0: #endif /* We get control passed to us here at t_zero. */ t_zero: b gokernel; nop; nop; nop; t_tflt: SPARC_TFAULT /* Inst. Access Exception */ t_bins: TRAP_ENTRY(0x2, bad_instruction) /* Illegal Instruction */ t_pins: TRAP_ENTRY(0x3, priv_instruction) /* Privileged Instruction */ t_fpd: TRAP_ENTRY(0x4, fpd_trap_handler) /* Floating Point Disabled */ t_wovf: WINDOW_SPILL /* Window Overflow */ t_wunf: WINDOW_FILL /* Window Underflow */ t_mna: TRAP_ENTRY(0x7, mna_handler) /* Memory Address Not Aligned */ t_fpe: TRAP_ENTRY(0x8, fpe_trap_handler) /* Floating Point Exception */ t_dflt: SPARC_DFAULT /* Data Miss Exception */ t_tio: TRAP_ENTRY(0xa, do_tag_overflow) /* Tagged Instruction Ovrflw */ t_wpt: TRAP_ENTRY(0xb, do_watchpoint) /* Watchpoint Detected */ t_badc: BAD_TRAP(0xc) BAD_TRAP(0xd) BAD_TRAP(0xe) BAD_TRAP(0xf) BAD_TRAP(0x10) t_irq1: TRAP_ENTRY_INTERRUPT(1) /* IRQ Software/SBUS Level 1 */ t_irq2: TRAP_ENTRY_INTERRUPT(2) /* IRQ SBUS Level 2 */ t_irq3: TRAP_ENTRY_INTERRUPT(3) /* IRQ SCSI/DMA/SBUS Level 3 */ t_irq4: TRAP_ENTRY_INTERRUPT(4) /* IRQ Software Level 4 */ t_irq5: TRAP_ENTRY_INTERRUPT(5) /* IRQ SBUS/Ethernet Level 5 */ t_irq6: TRAP_ENTRY_INTERRUPT(6) /* IRQ Software Level 6 */ t_irq7: TRAP_ENTRY_INTERRUPT(7) /* IRQ Video/SBUS Level 5 */ t_irq8: TRAP_ENTRY_INTERRUPT(8) /* IRQ SBUS Level 6 */ t_irq9: TRAP_ENTRY_INTERRUPT(9) /* IRQ SBUS Level 7 */ t_irq10:TRAP_ENTRY_INTERRUPT(10) /* IRQ Timer #1 (one we use) */ t_irq11:TRAP_ENTRY_INTERRUPT(11) /* IRQ Floppy Intr. */ t_irq12:TRAP_ENTRY_INTERRUPT(12) /* IRQ Zilog serial chip */ t_irq13:TRAP_ENTRY_INTERRUPT(13) /* IRQ Audio Intr. */ t_irq14:TRAP_ENTRY_INTERRUPT(14) /* IRQ Timer #2 */ .globl t_nmi #ifndef CONFIG_SMP t_nmi: NMI_TRAP /* Level 15 (NMI) */ #else t_nmi: TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m) #endif t_racc: TRAP_ENTRY(0x20, do_reg_access) /* General Register Access Error */ t_iacce:BAD_TRAP(0x21) /* Instr Access Error */ t_bad22:BAD_TRAP(0x22) BAD_TRAP(0x23) t_cpdis:TRAP_ENTRY(0x24, do_cp_disabled) /* Co-Processor Disabled */ t_uflsh:SKIP_TRAP(0x25, unimp_flush) /* Unimplemented FLUSH inst. */ t_bad26:BAD_TRAP(0x26) BAD_TRAP(0x27) t_cpexc:TRAP_ENTRY(0x28, do_cp_exception) /* Co-Processor Exception */ t_dacce:SPARC_DFAULT /* Data Access Error */ t_hwdz: TRAP_ENTRY(0x2a, do_hw_divzero) /* Division by zero, you lose... */ t_dserr:BAD_TRAP(0x2b) /* Data Store Error */ t_daccm:BAD_TRAP(0x2c) /* Data Access MMU-Miss */ t_bad2d:BAD_TRAP(0x2d) BAD_TRAP(0x2e) BAD_TRAP(0x2f) BAD_TRAP(0x30) BAD_TRAP(0x31) t_bad32:BAD_TRAP(0x32) BAD_TRAP(0x33) BAD_TRAP(0x34) BAD_TRAP(0x35) BAD_TRAP(0x36) t_bad37:BAD_TRAP(0x37) BAD_TRAP(0x38) BAD_TRAP(0x39) BAD_TRAP(0x3a) BAD_TRAP(0x3b) t_iaccm:BAD_TRAP(0x3c) /* Instr Access MMU-Miss */ t_bad3d:BAD_TRAP(0x3d) BAD_TRAP(0x3e) BAD_TRAP(0x3f) BAD_TRAP(0x40) BAD_TRAP(0x41) t_bad42:BAD_TRAP(0x42) BAD_TRAP(0x43) BAD_TRAP(0x44) BAD_TRAP(0x45) BAD_TRAP(0x46) t_bad47:BAD_TRAP(0x47) BAD_TRAP(0x48) BAD_TRAP(0x49) BAD_TRAP(0x4a) BAD_TRAP(0x4b) t_bad4c:BAD_TRAP(0x4c) BAD_TRAP(0x4d) BAD_TRAP(0x4e) BAD_TRAP(0x4f) BAD_TRAP(0x50) t_bad51:BAD_TRAP(0x51) BAD_TRAP(0x52) BAD_TRAP(0x53) BAD_TRAP(0x54) BAD_TRAP(0x55) t_bad56:BAD_TRAP(0x56) BAD_TRAP(0x57) BAD_TRAP(0x58) BAD_TRAP(0x59) BAD_TRAP(0x5a) t_bad5b:BAD_TRAP(0x5b) BAD_TRAP(0x5c) BAD_TRAP(0x5d) BAD_TRAP(0x5e) BAD_TRAP(0x5f) t_bad60:BAD_TRAP(0x60) BAD_TRAP(0x61) BAD_TRAP(0x62) BAD_TRAP(0x63) BAD_TRAP(0x64) t_bad65:BAD_TRAP(0x65) BAD_TRAP(0x66) BAD_TRAP(0x67) BAD_TRAP(0x68) BAD_TRAP(0x69) t_bad6a:BAD_TRAP(0x6a) BAD_TRAP(0x6b) BAD_TRAP(0x6c) BAD_TRAP(0x6d) BAD_TRAP(0x6e) t_bad6f:BAD_TRAP(0x6f) BAD_TRAP(0x70) BAD_TRAP(0x71) BAD_TRAP(0x72) BAD_TRAP(0x73) t_bad74:BAD_TRAP(0x74) BAD_TRAP(0x75) BAD_TRAP(0x76) BAD_TRAP(0x77) BAD_TRAP(0x78) t_bad79:BAD_TRAP(0x79) BAD_TRAP(0x7a) BAD_TRAP(0x7b) BAD_TRAP(0x7c) BAD_TRAP(0x7d) t_bad7e:BAD_TRAP(0x7e) BAD_TRAP(0x7f) t_bad80:BAD_TRAP(0x80) /* SunOS System Call */ t_sbkpt:BREAKPOINT_TRAP /* Software Breakpoint/KGDB */ t_divz: TRAP_ENTRY(0x82, do_hw_divzero) /* Divide by zero trap */ t_flwin:TRAP_ENTRY(0x83, do_flush_windows) /* Flush Windows Trap */ t_clwin:BAD_TRAP(0x84) /* Clean Windows Trap */ t_rchk: BAD_TRAP(0x85) /* Range Check */ t_funal:BAD_TRAP(0x86) /* Fix Unaligned Access Trap */ t_iovf: BAD_TRAP(0x87) /* Integer Overflow Trap */ t_bad88:BAD_TRAP(0x88) /* Slowaris System Call */ t_bad89:BAD_TRAP(0x89) /* Net-B.S. System Call */ t_bad8a:BAD_TRAP(0x8a) BAD_TRAP(0x8b) BAD_TRAP(0x8c) BAD_TRAP(0x8d) BAD_TRAP(0x8e) t_bad8f:BAD_TRAP(0x8f) t_linux:LINUX_SYSCALL_TRAP /* Linux System Call */ t_bad91:BAD_TRAP(0x91) BAD_TRAP(0x92) BAD_TRAP(0x93) BAD_TRAP(0x94) BAD_TRAP(0x95) t_bad96:BAD_TRAP(0x96) BAD_TRAP(0x97) BAD_TRAP(0x98) BAD_TRAP(0x99) BAD_TRAP(0x9a) t_bad9b:BAD_TRAP(0x9b) BAD_TRAP(0x9c) BAD_TRAP(0x9d) BAD_TRAP(0x9e) BAD_TRAP(0x9f) t_getcc:GETCC_TRAP /* Get Condition Codes */ t_setcc:SETCC_TRAP /* Set Condition Codes */ t_getpsr:GETPSR_TRAP /* Get PSR Register */ t_bada3:BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6) t_bada7:BAD_TRAP(0xa7) t_bada8:BAD_TRAP(0xa8) BAD_TRAP(0xa9) BAD_TRAP(0xaa) BAD_TRAP(0xab) t_badac:BAD_TRAP(0xac) BAD_TRAP(0xad) BAD_TRAP(0xae) BAD_TRAP(0xaf) BAD_TRAP(0xb0) t_badb1:BAD_TRAP(0xb1) BAD_TRAP(0xb2) BAD_TRAP(0xb3) BAD_TRAP(0xb4) BAD_TRAP(0xb5) t_badb6:BAD_TRAP(0xb6) BAD_TRAP(0xb7) BAD_TRAP(0xb8) BAD_TRAP(0xb9) BAD_TRAP(0xba) t_badbb:BAD_TRAP(0xbb) BAD_TRAP(0xbc) BAD_TRAP(0xbd) BAD_TRAP(0xbe) BAD_TRAP(0xbf) t_badc0:BAD_TRAP(0xc0) BAD_TRAP(0xc1) BAD_TRAP(0xc2) BAD_TRAP(0xc3) BAD_TRAP(0xc4) t_badc5:BAD_TRAP(0xc5) BAD_TRAP(0xc6) BAD_TRAP(0xc7) BAD_TRAP(0xc8) BAD_TRAP(0xc9) t_badca:BAD_TRAP(0xca) BAD_TRAP(0xcb) BAD_TRAP(0xcc) BAD_TRAP(0xcd) BAD_TRAP(0xce) t_badcf:BAD_TRAP(0xcf) BAD_TRAP(0xd0) BAD_TRAP(0xd1) BAD_TRAP(0xd2) BAD_TRAP(0xd3) t_badd4:BAD_TRAP(0xd4) BAD_TRAP(0xd5) BAD_TRAP(0xd6) BAD_TRAP(0xd7) BAD_TRAP(0xd8) t_badd9:BAD_TRAP(0xd9) BAD_TRAP(0xda) BAD_TRAP(0xdb) BAD_TRAP(0xdc) BAD_TRAP(0xdd) t_badde:BAD_TRAP(0xde) BAD_TRAP(0xdf) BAD_TRAP(0xe0) BAD_TRAP(0xe1) BAD_TRAP(0xe2) t_bade3:BAD_TRAP(0xe3) BAD_TRAP(0xe4) BAD_TRAP(0xe5) BAD_TRAP(0xe6) BAD_TRAP(0xe7) t_bade8:BAD_TRAP(0xe8) BAD_TRAP(0xe9) BAD_TRAP(0xea) BAD_TRAP(0xeb) BAD_TRAP(0xec) t_baded:BAD_TRAP(0xed) BAD_TRAP(0xee) BAD_TRAP(0xef) BAD_TRAP(0xf0) BAD_TRAP(0xf1) t_badf2:BAD_TRAP(0xf2) BAD_TRAP(0xf3) BAD_TRAP(0xf4) BAD_TRAP(0xf5) BAD_TRAP(0xf6) t_badf7:BAD_TRAP(0xf7) BAD_TRAP(0xf8) BAD_TRAP(0xf9) BAD_TRAP(0xfa) BAD_TRAP(0xfb) t_badfc:BAD_TRAP(0xfc) t_kgdb: KGDB_TRAP(0xfd) dbtrap: BAD_TRAP(0xfe) /* Debugger/PROM breakpoint #1 */ dbtrap2:BAD_TRAP(0xff) /* Debugger/PROM breakpoint #2 */ .globl end_traptable end_traptable: #ifdef CONFIG_SMP /* Trap tables for the other cpus. */ .globl trapbase_cpu1, trapbase_cpu2, trapbase_cpu3 trapbase_cpu1: BAD_TRAP(0x0) SRMMU_TFAULT TRAP_ENTRY(0x2, bad_instruction) TRAP_ENTRY(0x3, priv_instruction) TRAP_ENTRY(0x4, fpd_trap_handler) WINDOW_SPILL WINDOW_FILL TRAP_ENTRY(0x7, mna_handler) TRAP_ENTRY(0x8, fpe_trap_handler) SRMMU_DFAULT TRAP_ENTRY(0xa, do_tag_overflow) TRAP_ENTRY(0xb, do_watchpoint) BAD_TRAP(0xc) BAD_TRAP(0xd) BAD_TRAP(0xe) BAD_TRAP(0xf) BAD_TRAP(0x10) TRAP_ENTRY_INTERRUPT(1) TRAP_ENTRY_INTERRUPT(2) TRAP_ENTRY_INTERRUPT(3) TRAP_ENTRY_INTERRUPT(4) TRAP_ENTRY_INTERRUPT(5) TRAP_ENTRY_INTERRUPT(6) TRAP_ENTRY_INTERRUPT(7) TRAP_ENTRY_INTERRUPT(8) TRAP_ENTRY_INTERRUPT(9) TRAP_ENTRY_INTERRUPT(10) TRAP_ENTRY_INTERRUPT(11) TRAP_ENTRY_INTERRUPT(12) TRAP_ENTRY_INTERRUPT(13) TRAP_ENTRY_INTERRUPT(14) TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m) TRAP_ENTRY(0x20, do_reg_access) BAD_TRAP(0x21) BAD_TRAP(0x22) BAD_TRAP(0x23) TRAP_ENTRY(0x24, do_cp_disabled) SKIP_TRAP(0x25, unimp_flush) BAD_TRAP(0x26) BAD_TRAP(0x27) TRAP_ENTRY(0x28, do_cp_exception) SRMMU_DFAULT TRAP_ENTRY(0x2a, do_hw_divzero) BAD_TRAP(0x2b) BAD_TRAP(0x2c) BAD_TRAP(0x2d) BAD_TRAP(0x2e) BAD_TRAP(0x2f) BAD_TRAP(0x30) BAD_TRAP(0x31) BAD_TRAP(0x32) BAD_TRAP(0x33) BAD_TRAP(0x34) BAD_TRAP(0x35) BAD_TRAP(0x36) BAD_TRAP(0x37) BAD_TRAP(0x38) BAD_TRAP(0x39) BAD_TRAP(0x3a) BAD_TRAP(0x3b) BAD_TRAP(0x3c) BAD_TRAP(0x3d) BAD_TRAP(0x3e) BAD_TRAP(0x3f) BAD_TRAP(0x40) BAD_TRAP(0x41) BAD_TRAP(0x42) BAD_TRAP(0x43) BAD_TRAP(0x44) BAD_TRAP(0x45) BAD_TRAP(0x46) BAD_TRAP(0x47) BAD_TRAP(0x48) BAD_TRAP(0x49) BAD_TRAP(0x4a) BAD_TRAP(0x4b) BAD_TRAP(0x4c) BAD_TRAP(0x4d) BAD_TRAP(0x4e) BAD_TRAP(0x4f) BAD_TRAP(0x50) BAD_TRAP(0x51) BAD_TRAP(0x52) BAD_TRAP(0x53) BAD_TRAP(0x54) BAD_TRAP(0x55) BAD_TRAP(0x56) BAD_TRAP(0x57) BAD_TRAP(0x58) BAD_TRAP(0x59) BAD_TRAP(0x5a) BAD_TRAP(0x5b) BAD_TRAP(0x5c) BAD_TRAP(0x5d) BAD_TRAP(0x5e) BAD_TRAP(0x5f) BAD_TRAP(0x60) BAD_TRAP(0x61) BAD_TRAP(0x62) BAD_TRAP(0x63) BAD_TRAP(0x64) BAD_TRAP(0x65) BAD_TRAP(0x66) BAD_TRAP(0x67) BAD_TRAP(0x68) BAD_TRAP(0x69) BAD_TRAP(0x6a) BAD_TRAP(0x6b) BAD_TRAP(0x6c) BAD_TRAP(0x6d) BAD_TRAP(0x6e) BAD_TRAP(0x6f) BAD_TRAP(0x70) BAD_TRAP(0x71) BAD_TRAP(0x72) BAD_TRAP(0x73) BAD_TRAP(0x74) BAD_TRAP(0x75) BAD_TRAP(0x76) BAD_TRAP(0x77) BAD_TRAP(0x78) BAD_TRAP(0x79) BAD_TRAP(0x7a) BAD_TRAP(0x7b) BAD_TRAP(0x7c) BAD_TRAP(0x7d) BAD_TRAP(0x7e) BAD_TRAP(0x7f) BAD_TRAP(0x80) BREAKPOINT_TRAP TRAP_ENTRY(0x82, do_hw_divzero) TRAP_ENTRY(0x83, do_flush_windows) BAD_TRAP(0x84) BAD_TRAP(0x85) BAD_TRAP(0x86) BAD_TRAP(0x87) BAD_TRAP(0x88) BAD_TRAP(0x89) BAD_TRAP(0x8a) BAD_TRAP(0x8b) BAD_TRAP(0x8c) BAD_TRAP(0x8d) BAD_TRAP(0x8e) BAD_TRAP(0x8f) LINUX_SYSCALL_TRAP BAD_TRAP(0x91) BAD_TRAP(0x92) BAD_TRAP(0x93) BAD_TRAP(0x94) BAD_TRAP(0x95) BAD_TRAP(0x96) BAD_TRAP(0x97) BAD_TRAP(0x98) BAD_TRAP(0x99) BAD_TRAP(0x9a) BAD_TRAP(0x9b) BAD_TRAP(0x9c) BAD_TRAP(0x9d) BAD_TRAP(0x9e) BAD_TRAP(0x9f) GETCC_TRAP SETCC_TRAP GETPSR_TRAP BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6) BAD_TRAP(0xa7) BAD_TRAP(0xa8) BAD_TRAP(0xa9) BAD_TRAP(0xaa) BAD_TRAP(0xab) BAD_TRAP(0xac) BAD_TRAP(0xad) BAD_TRAP(0xae) BAD_TRAP(0xaf) BAD_TRAP(0xb0) BAD_TRAP(0xb1) BAD_TRAP(0xb2) BAD_TRAP(0xb3) BAD_TRAP(0xb4) BAD_TRAP(0xb5) BAD_TRAP(0xb6) BAD_TRAP(0xb7) BAD_TRAP(0xb8) BAD_TRAP(0xb9) BAD_TRAP(0xba) BAD_TRAP(0xbb) BAD_TRAP(0xbc) BAD_TRAP(0xbd) BAD_TRAP(0xbe) BAD_TRAP(0xbf) BAD_TRAP(0xc0) BAD_TRAP(0xc1) BAD_TRAP(0xc2) BAD_TRAP(0xc3) BAD_TRAP(0xc4) BAD_TRAP(0xc5) BAD_TRAP(0xc6) BAD_TRAP(0xc7) BAD_TRAP(0xc8) BAD_TRAP(0xc9) BAD_TRAP(0xca) BAD_TRAP(0xcb) BAD_TRAP(0xcc) BAD_TRAP(0xcd) BAD_TRAP(0xce) BAD_TRAP(0xcf) BAD_TRAP(0xd0) BAD_TRAP(0xd1) BAD_TRAP(0xd2) BAD_TRAP(0xd3) BAD_TRAP(0xd4) BAD_TRAP(0xd5) BAD_TRAP(0xd6) BAD_TRAP(0xd7) BAD_TRAP(0xd8) BAD_TRAP(0xd9) BAD_TRAP(0xda) BAD_TRAP(0xdb) BAD_TRAP(0xdc) BAD_TRAP(0xdd) BAD_TRAP(0xde) BAD_TRAP(0xdf) BAD_TRAP(0xe0) BAD_TRAP(0xe1) BAD_TRAP(0xe2) BAD_TRAP(0xe3) BAD_TRAP(0xe4) BAD_TRAP(0xe5) BAD_TRAP(0xe6) BAD_TRAP(0xe7) BAD_TRAP(0xe8) BAD_TRAP(0xe9) BAD_TRAP(0xea) BAD_TRAP(0xeb) BAD_TRAP(0xec) BAD_TRAP(0xed) BAD_TRAP(0xee) BAD_TRAP(0xef) BAD_TRAP(0xf0) BAD_TRAP(0xf1) BAD_TRAP(0xf2) BAD_TRAP(0xf3) BAD_TRAP(0xf4) BAD_TRAP(0xf5) BAD_TRAP(0xf6) BAD_TRAP(0xf7) BAD_TRAP(0xf8) BAD_TRAP(0xf9) BAD_TRAP(0xfa) BAD_TRAP(0xfb) BAD_TRAP(0xfc) KGDB_TRAP(0xfd) BAD_TRAP(0xfe) BAD_TRAP(0xff) trapbase_cpu2: BAD_TRAP(0x0) SRMMU_TFAULT TRAP_ENTRY(0x2, bad_instruction) TRAP_ENTRY(0x3, priv_instruction) TRAP_ENTRY(0x4, fpd_trap_handler) WINDOW_SPILL WINDOW_FILL TRAP_ENTRY(0x7, mna_handler) TRAP_ENTRY(0x8, fpe_trap_handler) SRMMU_DFAULT TRAP_ENTRY(0xa, do_tag_overflow) TRAP_ENTRY(0xb, do_watchpoint) BAD_TRAP(0xc) BAD_TRAP(0xd) BAD_TRAP(0xe) BAD_TRAP(0xf) BAD_TRAP(0x10) TRAP_ENTRY_INTERRUPT(1) TRAP_ENTRY_INTERRUPT(2) TRAP_ENTRY_INTERRUPT(3) TRAP_ENTRY_INTERRUPT(4) TRAP_ENTRY_INTERRUPT(5) TRAP_ENTRY_INTERRUPT(6) TRAP_ENTRY_INTERRUPT(7) TRAP_ENTRY_INTERRUPT(8) TRAP_ENTRY_INTERRUPT(9) TRAP_ENTRY_INTERRUPT(10) TRAP_ENTRY_INTERRUPT(11) TRAP_ENTRY_INTERRUPT(12) TRAP_ENTRY_INTERRUPT(13) TRAP_ENTRY_INTERRUPT(14) TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m) TRAP_ENTRY(0x20, do_reg_access) BAD_TRAP(0x21) BAD_TRAP(0x22) BAD_TRAP(0x23) TRAP_ENTRY(0x24, do_cp_disabled) SKIP_TRAP(0x25, unimp_flush) BAD_TRAP(0x26) BAD_TRAP(0x27) TRAP_ENTRY(0x28, do_cp_exception) SRMMU_DFAULT TRAP_ENTRY(0x2a, do_hw_divzero) BAD_TRAP(0x2b) BAD_TRAP(0x2c) BAD_TRAP(0x2d) BAD_TRAP(0x2e) BAD_TRAP(0x2f) BAD_TRAP(0x30) BAD_TRAP(0x31) BAD_TRAP(0x32) BAD_TRAP(0x33) BAD_TRAP(0x34) BAD_TRAP(0x35) BAD_TRAP(0x36) BAD_TRAP(0x37) BAD_TRAP(0x38) BAD_TRAP(0x39) BAD_TRAP(0x3a) BAD_TRAP(0x3b) BAD_TRAP(0x3c) BAD_TRAP(0x3d) BAD_TRAP(0x3e) BAD_TRAP(0x3f) BAD_TRAP(0x40) BAD_TRAP(0x41) BAD_TRAP(0x42) BAD_TRAP(0x43) BAD_TRAP(0x44) BAD_TRAP(0x45) BAD_TRAP(0x46) BAD_TRAP(0x47) BAD_TRAP(0x48) BAD_TRAP(0x49) BAD_TRAP(0x4a) BAD_TRAP(0x4b) BAD_TRAP(0x4c) BAD_TRAP(0x4d) BAD_TRAP(0x4e) BAD_TRAP(0x4f) BAD_TRAP(0x50) BAD_TRAP(0x51) BAD_TRAP(0x52) BAD_TRAP(0x53) BAD_TRAP(0x54) BAD_TRAP(0x55) BAD_TRAP(0x56) BAD_TRAP(0x57) BAD_TRAP(0x58) BAD_TRAP(0x59) BAD_TRAP(0x5a) BAD_TRAP(0x5b) BAD_TRAP(0x5c) BAD_TRAP(0x5d) BAD_TRAP(0x5e) BAD_TRAP(0x5f) BAD_TRAP(0x60) BAD_TRAP(0x61) BAD_TRAP(0x62) BAD_TRAP(0x63) BAD_TRAP(0x64) BAD_TRAP(0x65) BAD_TRAP(0x66) BAD_TRAP(0x67) BAD_TRAP(0x68) BAD_TRAP(0x69) BAD_TRAP(0x6a) BAD_TRAP(0x6b) BAD_TRAP(0x6c) BAD_TRAP(0x6d) BAD_TRAP(0x6e) BAD_TRAP(0x6f) BAD_TRAP(0x70) BAD_TRAP(0x71) BAD_TRAP(0x72) BAD_TRAP(0x73) BAD_TRAP(0x74) BAD_TRAP(0x75) BAD_TRAP(0x76) BAD_TRAP(0x77) BAD_TRAP(0x78) BAD_TRAP(0x79) BAD_TRAP(0x7a) BAD_TRAP(0x7b) BAD_TRAP(0x7c) BAD_TRAP(0x7d) BAD_TRAP(0x7e) BAD_TRAP(0x7f) BAD_TRAP(0x80) BREAKPOINT_TRAP TRAP_ENTRY(0x82, do_hw_divzero) TRAP_ENTRY(0x83, do_flush_windows) BAD_TRAP(0x84) BAD_TRAP(0x85) BAD_TRAP(0x86) BAD_TRAP(0x87) BAD_TRAP(0x88) BAD_TRAP(0x89) BAD_TRAP(0x8a) BAD_TRAP(0x8b) BAD_TRAP(0x8c) BAD_TRAP(0x8d) BAD_TRAP(0x8e) BAD_TRAP(0x8f) LINUX_SYSCALL_TRAP BAD_TRAP(0x91) BAD_TRAP(0x92) BAD_TRAP(0x93) BAD_TRAP(0x94) BAD_TRAP(0x95) BAD_TRAP(0x96) BAD_TRAP(0x97) BAD_TRAP(0x98) BAD_TRAP(0x99) BAD_TRAP(0x9a) BAD_TRAP(0x9b) BAD_TRAP(0x9c) BAD_TRAP(0x9d) BAD_TRAP(0x9e) BAD_TRAP(0x9f) GETCC_TRAP SETCC_TRAP GETPSR_TRAP BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6) BAD_TRAP(0xa7) BAD_TRAP(0xa8) BAD_TRAP(0xa9) BAD_TRAP(0xaa) BAD_TRAP(0xab) BAD_TRAP(0xac) BAD_TRAP(0xad) BAD_TRAP(0xae) BAD_TRAP(0xaf) BAD_TRAP(0xb0) BAD_TRAP(0xb1) BAD_TRAP(0xb2) BAD_TRAP(0xb3) BAD_TRAP(0xb4) BAD_TRAP(0xb5) BAD_TRAP(0xb6) BAD_TRAP(0xb7) BAD_TRAP(0xb8) BAD_TRAP(0xb9) BAD_TRAP(0xba) BAD_TRAP(0xbb) BAD_TRAP(0xbc) BAD_TRAP(0xbd) BAD_TRAP(0xbe) BAD_TRAP(0xbf) BAD_TRAP(0xc0) BAD_TRAP(0xc1) BAD_TRAP(0xc2) BAD_TRAP(0xc3) BAD_TRAP(0xc4) BAD_TRAP(0xc5) BAD_TRAP(0xc6) BAD_TRAP(0xc7) BAD_TRAP(0xc8) BAD_TRAP(0xc9) BAD_TRAP(0xca) BAD_TRAP(0xcb) BAD_TRAP(0xcc) BAD_TRAP(0xcd) BAD_TRAP(0xce) BAD_TRAP(0xcf) BAD_TRAP(0xd0) BAD_TRAP(0xd1) BAD_TRAP(0xd2) BAD_TRAP(0xd3) BAD_TRAP(0xd4) BAD_TRAP(0xd5) BAD_TRAP(0xd6) BAD_TRAP(0xd7) BAD_TRAP(0xd8) BAD_TRAP(0xd9) BAD_TRAP(0xda) BAD_TRAP(0xdb) BAD_TRAP(0xdc) BAD_TRAP(0xdd) BAD_TRAP(0xde) BAD_TRAP(0xdf) BAD_TRAP(0xe0) BAD_TRAP(0xe1) BAD_TRAP(0xe2) BAD_TRAP(0xe3) BAD_TRAP(0xe4) BAD_TRAP(0xe5) BAD_TRAP(0xe6) BAD_TRAP(0xe7) BAD_TRAP(0xe8) BAD_TRAP(0xe9) BAD_TRAP(0xea) BAD_TRAP(0xeb) BAD_TRAP(0xec) BAD_TRAP(0xed) BAD_TRAP(0xee) BAD_TRAP(0xef) BAD_TRAP(0xf0) BAD_TRAP(0xf1) BAD_TRAP(0xf2) BAD_TRAP(0xf3) BAD_TRAP(0xf4) BAD_TRAP(0xf5) BAD_TRAP(0xf6) BAD_TRAP(0xf7) BAD_TRAP(0xf8) BAD_TRAP(0xf9) BAD_TRAP(0xfa) BAD_TRAP(0xfb) BAD_TRAP(0xfc) KGDB_TRAP(0xfd) BAD_TRAP(0xfe) BAD_TRAP(0xff) trapbase_cpu3: BAD_TRAP(0x0) SRMMU_TFAULT TRAP_ENTRY(0x2, bad_instruction) TRAP_ENTRY(0x3, priv_instruction) TRAP_ENTRY(0x4, fpd_trap_handler) WINDOW_SPILL WINDOW_FILL TRAP_ENTRY(0x7, mna_handler) TRAP_ENTRY(0x8, fpe_trap_handler) SRMMU_DFAULT TRAP_ENTRY(0xa, do_tag_overflow) TRAP_ENTRY(0xb, do_watchpoint) BAD_TRAP(0xc) BAD_TRAP(0xd) BAD_TRAP(0xe) BAD_TRAP(0xf) BAD_TRAP(0x10) TRAP_ENTRY_INTERRUPT(1) TRAP_ENTRY_INTERRUPT(2) TRAP_ENTRY_INTERRUPT(3) TRAP_ENTRY_INTERRUPT(4) TRAP_ENTRY_INTERRUPT(5) TRAP_ENTRY_INTERRUPT(6) TRAP_ENTRY_INTERRUPT(7) TRAP_ENTRY_INTERRUPT(8) TRAP_ENTRY_INTERRUPT(9) TRAP_ENTRY_INTERRUPT(10) TRAP_ENTRY_INTERRUPT(11) TRAP_ENTRY_INTERRUPT(12) TRAP_ENTRY_INTERRUPT(13) TRAP_ENTRY_INTERRUPT(14) TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m) TRAP_ENTRY(0x20, do_reg_access) BAD_TRAP(0x21) BAD_TRAP(0x22) BAD_TRAP(0x23) TRAP_ENTRY(0x24, do_cp_disabled) SKIP_TRAP(0x25, unimp_flush) BAD_TRAP(0x26) BAD_TRAP(0x27) TRAP_ENTRY(0x28, do_cp_exception) SRMMU_DFAULT TRAP_ENTRY(0x2a, do_hw_divzero) BAD_TRAP(0x2b) BAD_TRAP(0x2c) BAD_TRAP(0x2d) BAD_TRAP(0x2e) BAD_TRAP(0x2f) BAD_TRAP(0x30) BAD_TRAP(0x31) BAD_TRAP(0x32) BAD_TRAP(0x33) BAD_TRAP(0x34) BAD_TRAP(0x35) BAD_TRAP(0x36) BAD_TRAP(0x37) BAD_TRAP(0x38) BAD_TRAP(0x39) BAD_TRAP(0x3a) BAD_TRAP(0x3b) BAD_TRAP(0x3c) BAD_TRAP(0x3d) BAD_TRAP(0x3e) BAD_TRAP(0x3f) BAD_TRAP(0x40) BAD_TRAP(0x41) BAD_TRAP(0x42) BAD_TRAP(0x43) BAD_TRAP(0x44) BAD_TRAP(0x45) BAD_TRAP(0x46) BAD_TRAP(0x47) BAD_TRAP(0x48) BAD_TRAP(0x49) BAD_TRAP(0x4a) BAD_TRAP(0x4b) BAD_TRAP(0x4c) BAD_TRAP(0x4d) BAD_TRAP(0x4e) BAD_TRAP(0x4f) BAD_TRAP(0x50) BAD_TRAP(0x51) BAD_TRAP(0x52) BAD_TRAP(0x53) BAD_TRAP(0x54) BAD_TRAP(0x55) BAD_TRAP(0x56) BAD_TRAP(0x57) BAD_TRAP(0x58) BAD_TRAP(0x59) BAD_TRAP(0x5a) BAD_TRAP(0x5b) BAD_TRAP(0x5c) BAD_TRAP(0x5d) BAD_TRAP(0x5e) BAD_TRAP(0x5f) BAD_TRAP(0x60) BAD_TRAP(0x61) BAD_TRAP(0x62) BAD_TRAP(0x63) BAD_TRAP(0x64) BAD_TRAP(0x65) BAD_TRAP(0x66) BAD_TRAP(0x67) BAD_TRAP(0x68) BAD_TRAP(0x69) BAD_TRAP(0x6a) BAD_TRAP(0x6b) BAD_TRAP(0x6c) BAD_TRAP(0x6d) BAD_TRAP(0x6e) BAD_TRAP(0x6f) BAD_TRAP(0x70) BAD_TRAP(0x71) BAD_TRAP(0x72) BAD_TRAP(0x73) BAD_TRAP(0x74) BAD_TRAP(0x75) BAD_TRAP(0x76) BAD_TRAP(0x77) BAD_TRAP(0x78) BAD_TRAP(0x79) BAD_TRAP(0x7a) BAD_TRAP(0x7b) BAD_TRAP(0x7c) BAD_TRAP(0x7d) BAD_TRAP(0x7e) BAD_TRAP(0x7f) BAD_TRAP(0x80) BREAKPOINT_TRAP TRAP_ENTRY(0x82, do_hw_divzero) TRAP_ENTRY(0x83, do_flush_windows) BAD_TRAP(0x84) BAD_TRAP(0x85) BAD_TRAP(0x86) BAD_TRAP(0x87) BAD_TRAP(0x88) BAD_TRAP(0x89) BAD_TRAP(0x8a) BAD_TRAP(0x8b) BAD_TRAP(0x8c) BAD_TRAP(0x8d) BAD_TRAP(0x8e) BAD_TRAP(0x8f) LINUX_SYSCALL_TRAP BAD_TRAP(0x91) BAD_TRAP(0x92) BAD_TRAP(0x93) BAD_TRAP(0x94) BAD_TRAP(0x95) BAD_TRAP(0x96) BAD_TRAP(0x97) BAD_TRAP(0x98) BAD_TRAP(0x99) BAD_TRAP(0x9a) BAD_TRAP(0x9b) BAD_TRAP(0x9c) BAD_TRAP(0x9d) BAD_TRAP(0x9e) BAD_TRAP(0x9f) GETCC_TRAP SETCC_TRAP GETPSR_TRAP BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6) BAD_TRAP(0xa7) BAD_TRAP(0xa8) BAD_TRAP(0xa9) BAD_TRAP(0xaa) BAD_TRAP(0xab) BAD_TRAP(0xac) BAD_TRAP(0xad) BAD_TRAP(0xae) BAD_TRAP(0xaf) BAD_TRAP(0xb0) BAD_TRAP(0xb1) BAD_TRAP(0xb2) BAD_TRAP(0xb3) BAD_TRAP(0xb4) BAD_TRAP(0xb5) BAD_TRAP(0xb6) BAD_TRAP(0xb7) BAD_TRAP(0xb8) BAD_TRAP(0xb9) BAD_TRAP(0xba) BAD_TRAP(0xbb) BAD_TRAP(0xbc) BAD_TRAP(0xbd) BAD_TRAP(0xbe) BAD_TRAP(0xbf) BAD_TRAP(0xc0) BAD_TRAP(0xc1) BAD_TRAP(0xc2) BAD_TRAP(0xc3) BAD_TRAP(0xc4) BAD_TRAP(0xc5) BAD_TRAP(0xc6) BAD_TRAP(0xc7) BAD_TRAP(0xc8) BAD_TRAP(0xc9) BAD_TRAP(0xca) BAD_TRAP(0xcb) BAD_TRAP(0xcc) BAD_TRAP(0xcd) BAD_TRAP(0xce) BAD_TRAP(0xcf) BAD_TRAP(0xd0) BAD_TRAP(0xd1) BAD_TRAP(0xd2) BAD_TRAP(0xd3) BAD_TRAP(0xd4) BAD_TRAP(0xd5) BAD_TRAP(0xd6) BAD_TRAP(0xd7) BAD_TRAP(0xd8) BAD_TRAP(0xd9) BAD_TRAP(0xda) BAD_TRAP(0xdb) BAD_TRAP(0xdc) BAD_TRAP(0xdd) BAD_TRAP(0xde) BAD_TRAP(0xdf) BAD_TRAP(0xe0) BAD_TRAP(0xe1) BAD_TRAP(0xe2) BAD_TRAP(0xe3) BAD_TRAP(0xe4) BAD_TRAP(0xe5) BAD_TRAP(0xe6) BAD_TRAP(0xe7) BAD_TRAP(0xe8) BAD_TRAP(0xe9) BAD_TRAP(0xea) BAD_TRAP(0xeb) BAD_TRAP(0xec) BAD_TRAP(0xed) BAD_TRAP(0xee) BAD_TRAP(0xef) BAD_TRAP(0xf0) BAD_TRAP(0xf1) BAD_TRAP(0xf2) BAD_TRAP(0xf3) BAD_TRAP(0xf4) BAD_TRAP(0xf5) BAD_TRAP(0xf6) BAD_TRAP(0xf7) BAD_TRAP(0xf8) BAD_TRAP(0xf9) BAD_TRAP(0xfa) BAD_TRAP(0xfb) BAD_TRAP(0xfc) KGDB_TRAP(0xfd) BAD_TRAP(0xfe) BAD_TRAP(0xff) #endif .align PAGE_SIZE /* This was the only reasonable way I could think of to properly align * these page-table data structures. */ .globl pg0, pg1, pg2, pg3 .globl empty_bad_page .globl empty_bad_page_table .globl empty_zero_page .globl swapper_pg_dir swapper_pg_dir: .skip PAGE_SIZE pg0: .skip PAGE_SIZE pg1: .skip PAGE_SIZE pg2: .skip PAGE_SIZE pg3: .skip PAGE_SIZE empty_bad_page: .skip PAGE_SIZE empty_bad_page_table: .skip PAGE_SIZE empty_zero_page: .skip PAGE_SIZE .global root_flags .global ram_flags .global root_dev .global sparc_ramdisk_image .global sparc_ramdisk_size /* This stuff has to be in sync with SILO and other potential boot loaders * Fields should be kept upward compatible and whenever any change is made, * HdrS version should be incremented. */ .ascii "HdrS" .word LINUX_VERSION_CODE .half 0x0203 /* HdrS version */ root_flags: .half 1 root_dev: .half 0 ram_flags: .half 0 sparc_ramdisk_image: .word 0 sparc_ramdisk_size: .word 0 .word reboot_command .word 0, 0, 0 .word _end /* Cool, here we go. Pick up the romvec pointer in %o0 and stash it in * %g7 and at prom_vector_p. And also quickly check whether we are on * a v0, v2, or v3 prom. */ gokernel: /* Ok, it's nice to know, as early as possible, if we * are already mapped where we expect to be in virtual * memory. The Solaris /boot elf format bootloader * will peek into our elf header and load us where * we want to be, otherwise we have to re-map. * * Some boot loaders don't place the jmp'rs address * in %o7, so we do a pc-relative call to a local * label, then see what %o7 has. */ mov %o7, %g4 ! Save %o7 /* Jump to it, and pray... */ current_pc: call 1f nop 1: mov %o7, %g3 tst %o0 be no_sun4u_here mov %g4, %o7 /* Previous %o7. */ mov %o0, %l0 ! stash away romvec mov %o0, %g7 ! put it here too mov %o1, %l1 ! stash away debug_vec too /* Ok, let's check out our run time program counter. */ set current_pc, %g5 cmp %g3, %g5 be already_mapped nop /* %l6 will hold the offset we have to subtract * from absolute symbols in order to access areas * in our own image. If already mapped this is * just plain zero, else it is KERNBASE. */ set KERNBASE, %l6 b copy_prom_lvl14 nop already_mapped: mov 0, %l6 /* Copy over the Prom's level 14 clock handler. */ copy_prom_lvl14: #if 1 /* DJHR * preserve our linked/calculated instructions */ set lvl14_save, %g1 set t_irq14, %g3 sub %g1, %l6, %g1 ! translate to physical sub %g3, %l6, %g3 ! translate to physical ldd [%g3], %g4 std %g4, [%g1] ldd [%g3+8], %g4 std %g4, [%g1+8] #endif rd %tbr, %g1 andn %g1, 0xfff, %g1 ! proms trap table base or %g0, (0x1e<<4), %g2 ! offset to lvl14 intr or %g1, %g2, %g2 set t_irq14, %g3 sub %g3, %l6, %g3 ldd [%g2], %g4 std %g4, [%g3] ldd [%g2 + 0x8], %g4 std %g4, [%g3 + 0x8] ! Copy proms handler /* Must determine whether we are on a sun4c MMU, SRMMU, or SUN4/400 MUTANT * MMU so we can remap ourselves properly. DON'T TOUCH %l0 thru %l5 in these * remapping routines, we need their values afterwards! */ /* Now check whether we are already mapped, if we * are we can skip all this garbage coming up. */ copy_prom_done: cmp %l6, 0 be go_to_highmem ! this will be a nop then nop set LOAD_ADDR, %g6 cmp %g7, %g6 bne remap_not_a_sun4 ! This is not a Sun4 nop or %g0, 0x1, %g1 lduba [%g1] ASI_CONTROL, %g1 ! Only safe to try on Sun4. subcc %g1, 0x24, %g0 ! Is this a mutant Sun4/400??? be sun4_mutant_remap ! Ugh, it is... nop b sun4_normal_remap ! regular sun4, 2 level mmu nop remap_not_a_sun4: lda [%g0] ASI_M_MMUREGS, %g1 ! same as ASI_PTE on sun4c and %g1, 0x1, %g1 ! Test SRMMU Enable bit ;-) cmp %g1, 0x0 be sun4c_remap ! A sun4c MMU or normal Sun4 nop srmmu_remap: /* First, check for a viking (TI) module. */ set 0x40000000, %g2 rd %psr, %g3 and %g2, %g3, %g3 subcc %g3, 0x0, %g0 bz srmmu_nviking nop /* Figure out what kind of viking we are on. * We need to know if we have to play with the * AC bit and disable traps or not. */ /* I've only seen MicroSparc's on SparcClassics with this * bit set. */ set 0x800, %g2 lda [%g0] ASI_M_MMUREGS, %g3 ! peek in the control reg and %g2, %g3, %g3 subcc %g3, 0x0, %g0 bnz srmmu_nviking ! is in mbus mode nop rd %psr, %g3 ! DO NOT TOUCH %g3 andn %g3, PSR_ET, %g2 wr %g2, 0x0, %psr WRITE_PAUSE /* Get context table pointer, then convert to * a physical address, which is 36 bits. */ set AC_M_CTPR, %g4 lda [%g4] ASI_M_MMUREGS, %g4 sll %g4, 0x4, %g4 ! We use this below ! DO NOT TOUCH %g4 /* Set the AC bit in the Viking's MMU control reg. */ lda [%g0] ASI_M_MMUREGS, %g5 ! DO NOT TOUCH %g5 set 0x8000, %g6 ! AC bit mask or %g5, %g6, %g6 ! Or it in... sta %g6, [%g0] ASI_M_MMUREGS ! Close your eyes... /* Grrr, why does it seem like every other load/store * on the sun4m is in some ASI space... * Fine with me, let's get the pointer to the level 1 * page table directory and fetch its entry. */ lda [%g4] ASI_M_BYPASS, %o1 ! This is a level 1 ptr srl %o1, 0x4, %o1 ! Clear low 4 bits sll %o1, 0x8, %o1 ! Make physical /* Ok, pull in the PTD. */ lda [%o1] ASI_M_BYPASS, %o2 ! This is the 0x0 16MB pgd /* Calculate to KERNBASE entry. */ add %o1, KERNBASE >> (SRMMU_PGDIR_SHIFT - 2), %o3 /* Poke the entry into the calculated address. */ sta %o2, [%o3] ASI_M_BYPASS /* I don't get it Sun, if you engineered all these * boot loaders and the PROM (thank you for the debugging * features btw) why did you not have them load kernel * images up in high address space, since this is necessary * for ABI compliance anyways? Does this low-mapping provide * enhanced interoperability? * * "The PROM is the computer." */ /* Ok, restore the MMU control register we saved in %g5 */ sta %g5, [%g0] ASI_M_MMUREGS ! POW... ouch /* Turn traps back on. We saved it in %g3 earlier. */ wr %g3, 0x0, %psr ! tick tock, tick tock /* Now we burn precious CPU cycles due to bad engineering. */ WRITE_PAUSE /* Wow, all that just to move a 32-bit value from one * place to another... Jump to high memory. */ b go_to_highmem nop /* This works on viking's in Mbus mode and all * other MBUS modules. It is virtually the same as * the above madness sans turning traps off and flipping * the AC bit. */ srmmu_nviking: set AC_M_CTPR, %g1 lda [%g1] ASI_M_MMUREGS, %g1 ! get ctx table ptr sll %g1, 0x4, %g1 ! make physical addr lda [%g1] ASI_M_BYPASS, %g1 ! ptr to level 1 pg_table srl %g1, 0x4, %g1 sll %g1, 0x8, %g1 ! make phys addr for l1 tbl lda [%g1] ASI_M_BYPASS, %g2 ! get level1 entry for 0x0 add %g1, KERNBASE >> (SRMMU_PGDIR_SHIFT - 2), %g3 sta %g2, [%g3] ASI_M_BYPASS ! place at KERNBASE entry b go_to_highmem nop ! wheee.... /* This remaps the kernel on Sun4/4xx machines * that have the Sun Mutant Three Level MMU. * It's like a platypus, Sun didn't have the * SRMMU in conception so they kludged the three * level logic in the regular Sun4 MMU probably. * * Basically, you take each entry in the top level * directory that maps the low 3MB starting at * address zero and put the mapping in the KERNBASE * slots. These top level pgd's are called regmaps. */ sun4_mutant_remap: or %g0, %g0, %g3 ! source base sethi %hi(KERNBASE), %g4 ! destination base or %g4, %lo(KERNBASE), %g4 sethi %hi(0x300000), %g5 or %g5, %lo(0x300000), %g5 ! upper bound 3MB or %g0, 0x1, %l6 sll %l6, 24, %l6 ! Regmap mapping size add %g3, 0x2, %g3 ! Base magic add %g4, 0x2, %g4 ! Base magic /* Main remapping loop on Sun4-Mutant-MMU. * "I am not an animal..." -Famous Mutant Person */ sun4_mutant_loop: lduha [%g3] ASI_REGMAP, %g2 ! Get lower entry stha %g2, [%g4] ASI_REGMAP ! Store in high entry add %g4, %l6, %g4 ! Move up high memory ptr subcc %g3, %g5, %g0 ! Reached our limit? blu sun4_mutant_loop ! Nope, loop again add %g3, %l6, %g3 ! delay, Move up low ptr b go_to_highmem ! Jump to high memory. nop /* The following is for non-4/4xx sun4 MMU's. */ sun4_normal_remap: mov 0, %g3 ! source base set KERNBASE, %g4 ! destination base set 0x300000, %g5 ! upper bound 3MB mov 1, %l6 sll %l6, 18, %l6 ! sun4 mmu segmap size sun4_normal_loop: lduha [%g3] ASI_SEGMAP, %g6 ! load phys_seg stha %g6, [%g4] ASI_SEGMAP ! stort new virt mapping add %g3, %l6, %g3 ! increment source pointer subcc %g3, %g5, %g0 ! reached limit? blu sun4_normal_loop ! nope, loop again add %g4, %l6, %g4 ! delay, increment dest ptr b go_to_highmem nop /* The following works for Sun4c MMU's */ sun4c_remap: mov 0, %g3 ! source base set KERNBASE, %g4 ! destination base set 0x300000, %g5 ! upper bound 3MB mov 1, %l6 sll %l6, 18, %l6 ! sun4c mmu segmap size sun4c_remap_loop: lda [%g3] ASI_SEGMAP, %g6 ! load phys_seg sta %g6, [%g4] ASI_SEGMAP ! store new virt mapping add %g3, %l6, %g3 ! Increment source ptr subcc %g3, %g5, %g0 ! Reached limit? bl sun4c_remap_loop ! Nope, loop again add %g4, %l6, %g4 ! delay, Increment dest ptr /* Now do a non-relative jump so that PC is in high-memory */ go_to_highmem: set execute_in_high_mem, %g1 jmpl %g1, %g0 nop /* The code above should be at beginning and we have to take care about * short jumps, as branching to .text.init section from .text is usually * impossible */ __INIT /* Acquire boot time privileged register values, this will help debugging. * I figure out and store nwindows and nwindowsm1 later on. */ execute_in_high_mem: mov %l0, %o0 ! put back romvec mov %l1, %o1 ! and debug_vec sethi %hi(prom_vector_p), %g1 st %o0, [%g1 + %lo(prom_vector_p)] sethi %hi(linux_dbvec), %g1 st %o1, [%g1 + %lo(linux_dbvec)] ld [%o0 + 0x4], %o3 and %o3, 0x3, %o5 ! get the version cmp %o3, 0x2 ! a v2 prom? be found_version nop /* paul@sfe.com.au */ cmp %o3, 0x3 ! a v3 prom? be found_version nop /* Old sun4's pass our load address into %o0 instead of the prom * pointer. On sun4's you have to hard code the romvec pointer into * your code. Sun probably still does that because they don't even * trust their own "OpenBoot" specifications. */ set LOAD_ADDR, %g6 cmp %o0, %g6 ! an old sun4? be sun4_init nop found_version: /* Get the machine type via the mysterious romvec node operations. */ add %g7, 0x1c, %l1 ld [%l1], %l0 ld [%l0], %l0 call %l0 or %g0, %g0, %o0 ! next_node(0) = first_node or %o0, %g0, %g6 sethi %hi(cputypvar), %o1 ! First node has cpu-arch or %o1, %lo(cputypvar), %o1 sethi %hi(cputypval), %o2 ! information, the string or %o2, %lo(cputypval), %o2 ld [%l1], %l0 ! 'compatibility' tells ld [%l0 + 0xc], %l0 ! that we want 'sun4x' where call %l0 ! x is one of '', 'c', 'm', nop ! 'd' or 'e'. %o2 holds pointer ! to a buf where above string ! will get stored by the prom. subcc %o0, %g0, %g0 bpos got_prop ! Got the property nop or %g6, %g0, %o0 sethi %hi(cputypvar_sun4m), %o1 or %o1, %lo(cputypvar_sun4m), %o1 sethi %hi(cputypval), %o2 or %o2, %lo(cputypval), %o2 ld [%l1], %l0 ld [%l0 + 0xc], %l0 call %l0 nop got_prop: set cputypval, %o2 ldub [%o2 + 0x4], %l1 cmp %l1, ' ' be 1f cmp %l1, 'c' be 1f cmp %l1, 'm' be 1f cmp %l1, 's' be 1f cmp %l1, 'd' be 1f cmp %l1, 'e' be no_sun4e_here ! Could be a sun4e. nop b no_sun4u_here ! AIEEE, a V9 sun4u... Get our BIG BROTHER kernel :)) nop 1: set cputypval, %l1 ldub [%l1 + 0x4], %l1 cmp %l1, 'm' ! Test for sun4d, sun4e ? be sun4m_init cmp %l1, 's' ! Treat sun4s as sun4m be sun4m_init cmp %l1, 'd' ! Let us see how the beast will die be sun4d_init nop /* Jump into mmu context zero. */ set AC_CONTEXT, %g1 stba %g0, [%g1] ASI_CONTROL b sun4c_continue_boot nop /* CPUID in bootbus can be found at PA 0xff0140000 */ #define SUN4D_BOOTBUS_CPUID 0xf0140000 sun4d_init: /* Need to patch call to handler_irq */ set patch_handler_irq, %g4 set sun4d_handler_irq, %g5 sethi %hi(0x40000000), %g3 ! call sub %g5, %g4, %g5 srl %g5, 2, %g5 or %g5, %g3, %g5 st %g5, [%g4] #ifdef CONFIG_SMP /* Get our CPU id out of bootbus */ set SUN4D_BOOTBUS_CPUID, %g3 lduba [%g3] ASI_M_CTL, %g3 and %g3, 0xf8, %g3 srl %g3, 3, %g4 sta %g4, [%g0] ASI_M_VIKING_TMP1 sethi %hi(boot_cpu_id), %g5 stb %g4, [%g5 + %lo(boot_cpu_id)] sll %g4, 2, %g4 sethi %hi(boot_cpu_id4), %g5 stb %g4, [%g5 + %lo(boot_cpu_id4)] #endif /* Fall through to sun4m_init */ sun4m_init: /* XXX Fucking Cypress... */ lda [%g0] ASI_M_MMUREGS, %g5 srl %g5, 28, %g4 cmp %g4, 1 bne 1f srl %g5, 24, %g4 and %g4, 0xf, %g4 cmp %g4, 7 /* This would be a HyperSparc. */ bne 2f nop 1: #define PATCH_IT(dst, src) \ set (dst), %g5; \ set (src), %g4; \ ld [%g4], %g3; \ st %g3, [%g5]; \ ld [%g4+0x4], %g3; \ st %g3, [%g5+0x4]; /* Signed multiply. */ PATCH_IT(.mul, .mul_patch) PATCH_IT(.mul+0x08, .mul_patch+0x08) /* Signed remainder. */ PATCH_IT(.rem, .rem_patch) PATCH_IT(.rem+0x08, .rem_patch+0x08) PATCH_IT(.rem+0x10, .rem_patch+0x10) PATCH_IT(.rem+0x18, .rem_patch+0x18) PATCH_IT(.rem+0x20, .rem_patch+0x20) PATCH_IT(.rem+0x28, .rem_patch+0x28) /* Signed division. */ PATCH_IT(.div, .div_patch) PATCH_IT(.div+0x08, .div_patch+0x08) PATCH_IT(.div+0x10, .div_patch+0x10) PATCH_IT(.div+0x18, .div_patch+0x18) PATCH_IT(.div+0x20, .div_patch+0x20) /* Unsigned multiply. */ PATCH_IT(.umul, .umul_patch) PATCH_IT(.umul+0x08, .umul_patch+0x08) /* Unsigned remainder. */ PATCH_IT(.urem, .urem_patch) PATCH_IT(.urem+0x08, .urem_patch+0x08) PATCH_IT(.urem+0x10, .urem_patch+0x10) PATCH_IT(.urem+0x18, .urem_patch+0x18) /* Unsigned division. */ PATCH_IT(.udiv, .udiv_patch) PATCH_IT(.udiv+0x08, .udiv_patch+0x08) PATCH_IT(.udiv+0x10, .udiv_patch+0x10) #undef PATCH_IT /* Ok, the PROM could have done funny things and apple cider could still * be sitting in the fault status/address registers. Read them all to * clear them so we don't get magic faults later on. */ /* This sucks, apparently this makes Vikings call prom panic, will fix later */ 2: rd %psr, %o1 srl %o1, 28, %o1 ! Get a type of the CPU subcc %o1, 4, %g0 ! TI: Viking or MicroSPARC be sun4c_continue_boot nop set AC_M_SFSR, %o0 lda [%o0] ASI_M_MMUREGS, %g0 set AC_M_SFAR, %o0 lda [%o0] ASI_M_MMUREGS, %g0 /* Fujitsu MicroSPARC-II has no asynchronous flavors of FARs */ subcc %o1, 0, %g0 be sun4c_continue_boot nop set AC_M_AFSR, %o0 lda [%o0] ASI_M_MMUREGS, %g0 set AC_M_AFAR, %o0 lda [%o0] ASI_M_MMUREGS, %g0 nop sun4c_continue_boot: /* Aieee, now set PC and nPC, enable traps, give ourselves a stack and it's * show-time! */ sethi %hi(cputyp), %o0 st %g4, [%o0 + %lo(cputyp)] /* Turn on Supervisor, EnableFloating, and all the PIL bits. * Also puts us in register window zero with traps off. */ set (PSR_PS | PSR_S | PSR_PIL | PSR_EF), %g2 wr %g2, 0x0, %psr WRITE_PAUSE /* I want a kernel stack NOW! */ set init_thread_union, %g1 set (THREAD_SIZE - STACKFRAME_SZ), %g2 add %g1, %g2, %sp mov 0, %fp /* And for good luck */ /* Zero out our BSS section. */ set __bss_start , %o0 ! First address of BSS set end , %o1 ! Last address of BSS add %o0, 0x1, %o0 1: stb %g0, [%o0] subcc %o0, %o1, %g0 bl 1b add %o0, 0x1, %o0 /* Initialize the uwinmask value for init task just in case. * But first make current_set[boot_cpu_id] point to something useful. */ set init_thread_union, %g6 set current_set, %g2 #ifdef CONFIG_SMP sethi %hi(boot_cpu_id4), %g3 ldub [%g3 + %lo(boot_cpu_id4)], %g3 st %g6, [%g2] add %g2, %g3, %g2 #endif st %g6, [%g2] st %g0, [%g6 + TI_UWINMASK] /* Compute NWINDOWS and stash it away. Now uses %wim trick explained * in the V8 manual. Ok, this method seems to work, Sparc is cool... * No, it doesn't work, have to play the save/readCWP/restore trick. */ wr %g0, 0x0, %wim ! so we do not get a trap WRITE_PAUSE save rd %psr, %g3 restore and %g3, 0x1f, %g3 add %g3, 0x1, %g3 mov 2, %g1 wr %g1, 0x0, %wim ! make window 1 invalid WRITE_PAUSE cmp %g3, 0x7 bne 2f nop /* Adjust our window handling routines to * do things correctly on 7 window Sparcs. */ #define PATCH_INSN(src, dest) \ set src, %g5; \ set dest, %g2; \ ld [%g5], %g4; \ st %g4, [%g2]; /* Patch for window spills... */ PATCH_INSN(spnwin_patch1_7win, spnwin_patch1) PATCH_INSN(spnwin_patch2_7win, spnwin_patch2) PATCH_INSN(spnwin_patch3_7win, spnwin_patch3) /* Patch for window fills... */ PATCH_INSN(fnwin_patch1_7win, fnwin_patch1) PATCH_INSN(fnwin_patch2_7win, fnwin_patch2) /* Patch for trap entry setup... */ PATCH_INSN(tsetup_7win_patch1, tsetup_patch1) PATCH_INSN(tsetup_7win_patch2, tsetup_patch2) PATCH_INSN(tsetup_7win_patch3, tsetup_patch3) PATCH_INSN(tsetup_7win_patch4, tsetup_patch4) PATCH_INSN(tsetup_7win_patch5, tsetup_patch5) PATCH_INSN(tsetup_7win_patch6, tsetup_patch6) /* Patch for returning from traps... */ PATCH_INSN(rtrap_7win_patch1, rtrap_patch1) PATCH_INSN(rtrap_7win_patch2, rtrap_patch2) PATCH_INSN(rtrap_7win_patch3, rtrap_patch3) PATCH_INSN(rtrap_7win_patch4, rtrap_patch4) PATCH_INSN(rtrap_7win_patch5, rtrap_patch5) /* Patch for killing user windows from the register file. */ PATCH_INSN(kuw_patch1_7win, kuw_patch1) /* Now patch the kernel window flush sequences. * This saves 2 traps on every switch and fork. */ set 0x01000000, %g4 set flush_patch_one, %g5 st %g4, [%g5 + 0x18] st %g4, [%g5 + 0x1c] set flush_patch_two, %g5 st %g4, [%g5 + 0x18] st %g4, [%g5 + 0x1c] set flush_patch_three, %g5 st %g4, [%g5 + 0x18] st %g4, [%g5 + 0x1c] set flush_patch_four, %g5 st %g4, [%g5 + 0x18] st %g4, [%g5 + 0x1c] set flush_patch_exception, %g5 st %g4, [%g5 + 0x18] st %g4, [%g5 + 0x1c] set flush_patch_switch, %g5 st %g4, [%g5 + 0x18] st %g4, [%g5 + 0x1c] 2: sethi %hi(nwindows), %g4 st %g3, [%g4 + %lo(nwindows)] ! store final value sub %g3, 0x1, %g3 sethi %hi(nwindowsm1), %g4 st %g3, [%g4 + %lo(nwindowsm1)] /* Here we go, start using Linux's trap table... */ set trapbase, %g3 wr %g3, 0x0, %tbr WRITE_PAUSE /* Finally, turn on traps so that we can call c-code. */ rd %psr, %g3 wr %g3, 0x0, %psr WRITE_PAUSE wr %g3, PSR_ET, %psr WRITE_PAUSE /* First we call prom_init() to set up PROMLIB, then * off to start_kernel(). */ sethi %hi(prom_vector_p), %g5 ld [%g5 + %lo(prom_vector_p)], %o0 call prom_init nop call start_kernel nop /* We should not get here. */ call halt_me nop sun4_init: sethi %hi(SUN4_PROM_VECTOR+0x84), %o1 ld [%o1 + %lo(SUN4_PROM_VECTOR+0x84)], %o1 set sun4_notsup, %o0 call %o1 /* printf */ nop sethi %hi(SUN4_PROM_VECTOR+0xc4), %o1 ld [%o1 + %lo(SUN4_PROM_VECTOR+0xc4)], %o1 call %o1 /* exittomon */ nop 1: ba 1b ! Cannot exit into KMON nop no_sun4e_here: ld [%g7 + 0x68], %o1 set sun4e_notsup, %o0 call %o1 nop b halt_me nop __INITDATA sun4u_1: .asciz "finddevice" .align 4 sun4u_2: .asciz "/chosen" .align 4 sun4u_3: .asciz "getprop" .align 4 sun4u_4: .asciz "stdout" .align 4 sun4u_5: .asciz "write" .align 4 sun4u_6: .asciz "\n\rOn sun4u you have to use UltraLinux (64bit) kernel\n\rand not a 32bit sun4[cdem] version\n\r\n\r" sun4u_6e: .align 4 sun4u_7: .asciz "exit" .align 8 sun4u_a1: .word 0, sun4u_1, 0, 1, 0, 1, 0, sun4u_2, 0 sun4u_r1: .word 0 sun4u_a2: .word 0, sun4u_3, 0, 4, 0, 1, 0 sun4u_i2: .word 0, 0, sun4u_4, 0, sun4u_1, 0, 8, 0 sun4u_r2: .word 0 sun4u_a3: .word 0, sun4u_5, 0, 3, 0, 1, 0 sun4u_i3: .word 0, 0, sun4u_6, 0, sun4u_6e - sun4u_6 - 1, 0 sun4u_r3: .word 0 sun4u_a4: .word 0, sun4u_7, 0, 0, 0, 0 sun4u_r4: __INIT no_sun4u_here: set sun4u_a1, %o0 set current_pc, %l2 cmp %l2, %g3 be 1f mov %o4, %l0 sub %g3, %l2, %l6 add %o0, %l6, %o0 mov %o0, %l4 mov sun4u_r4 - sun4u_a1, %l3 ld [%l4], %l5 2: add %l4, 4, %l4 cmp %l5, %l2 add %l5, %l6, %l5 bgeu,a 3f st %l5, [%l4 - 4] 3: subcc %l3, 4, %l3 bne 2b ld [%l4], %l5 1: call %l0 mov %o0, %l1 ld [%l1 + (sun4u_r1 - sun4u_a1)], %o1 add %l1, (sun4u_a2 - sun4u_a1), %o0 call %l0 st %o1, [%o0 + (sun4u_i2 - sun4u_a2)] ld [%l1 + (sun4u_1 - sun4u_a1)], %o1 add %l1, (sun4u_a3 - sun4u_a1), %o0 call %l0 st %o1, [%o0 + (sun4u_i3 - sun4u_a3)] call %l0 add %l1, (sun4u_a4 - sun4u_a1), %o0 /* Not reached */ halt_me: ld [%g7 + 0x74], %o0 call %o0 ! Get us out of here... nop ! Apparently Solaris is better. /* Ok, now we continue in the .data/.text sections */ .data .align 4 /* * Fill up the prom vector, note in particular the kind first element, * no joke. I don't need all of them in here as the entire prom vector * gets initialized in c-code so all routines can use it. */ prom_vector_p: .word 0 /* We calculate the following at boot time, window fills/spills and trap entry * code uses these to keep track of the register windows. */ .align 4 .globl nwindows .globl nwindowsm1 nwindows: .word 8 nwindowsm1: .word 7 /* Boot time debugger vector value. We need this later on. */ .align 4 .globl linux_dbvec linux_dbvec: .word 0 .word 0 .align 8 .globl lvl14_save lvl14_save: .word 0 .word 0 .word 0 .word 0 .word t_irq14 .section ".fixup",#alloc,#execinstr .globl __ret_efault __ret_efault: ret restore %g0, -EFAULT, %o0