patch-1.3.44 linux/arch/sparc/kernel/head.S
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- Lines: 1260
- Date:
Sat Nov 25 02:58:04 1995
- Orig file:
v1.3.43/linux/arch/sparc/kernel/head.S
- Orig date:
Tue Jun 27 14:11:31 1995
diff -u --recursive --new-file v1.3.43/linux/arch/sparc/kernel/head.S linux/arch/sparc/kernel/head.S
@@ -1,67 +1,23 @@
-/* head.S: The initial boot code for the Sparc port of Linux.
+/* $Id: head.S,v 1.39 1995/11/25 00:58:01 davem Exp $
+ * head.S: The initial boot code for the Sparc port of Linux.
*
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- *
- * This file has to serve three purposes.
- *
- * 1) determine the prom-version and cpu/architecture
- * 2) print enough useful info before we start to execute
- * c-code that I can possibly begin to debug things
- * 3) Hold the vector of trap entry points
- *
- * The Sparc offers many challenges to kernel design. Here I will
- * document those I have come across thus far. Upon bootup the boot
- * prom loads your a.out image into memory. This memory the prom has
- * already mapped for you in two places, however as far as I can tell
- * the virtual address cache is not turned on although the MMU is
- * translating things. You get loaded at 0x4000 exactly and you are
- * aliased to 0xf8004000 with the appropriate mmu entries. So, when
- * you link a boot-loadable object you want to do something like
- *
- * ld -e start -Ttext 4000 -o mykernel myobj1.o myobj2.o ....
- *
- * to produce a proper image.
- *
- * At boot time you are given (as far as I can tell at this time)
- * one key to figure out what machine you are one and what devices
- * are available. The prom when it loads you leaves a pointer to
- * the 'rom vector' in register %o0 right before it jumps to your
- * starting address. This is a pointer to a struct that is full of
- * pointer to functions (ie. printf, halt, reboot), pointers to
- * linked lists (ie. memory mappings), and pointer to empirical
- * constants (ie. stdin and stdout magic cookies + rom version).
- * Starting with this piece of information you can figure out
- * just about anything you want about the machine you are on.
- *
- * Although I don't use it now, if you are on a Multiprocessor and
- * therefore a v3 or above prom, register %o2 at boot contains a
- * function pointer you must call before you proceed to invoke the
- * other cpu's on the machine. I have no idea what kind of magic this
- * is, give me time.
+ * Copyright (C) 1995 Peter Zaitcev (Zaitcev@ipmce.su)
*/
+#include <linux/version.h>
+
#include <asm/cprefix.h>
#include <asm/head.h>
-#include <linux/version.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>
.data
-
-/* First thing to go in the data segment is the interrupt stack. */
-
- .globl C_LABEL(intstack)
- .globl C_LABEL(eintstack)
- .align 4
-C_LABEL(intstack):
- .skip 4 * PAGE_SIZE ! 16k = 128 128-byte stack frames
-C_LABEL(eintstack):
-
-
-
/*
* The following are used with the prom_vector node-ops to figure out
* the cpu-type
@@ -98,10 +54,7 @@
C_LABEL(cputypvar_sun4m):
.asciz "compatible"
-/* WARNING: evil messages follow */
-
.align 4
-
sun4_notsup:
.asciz "Sparc-Linux sun4 support not implemented yet\n\n"
.align 4
@@ -118,302 +71,112 @@
.asciz "Sparc-Linux sun4u support does not exist\n\n"
.align 4
-/* Ok, things start to get interesting. We get linked such that 'start'
- * is the entry symbol. However, it is real low in kernel address space
- * and as such a nifty place to place the trap table. We achieve this goal
- * by just jumping to 'gokernel' for the first trap's entry as the sparc
- * never receives the zero trap as it is real special (hw reset).
- *
- * Each trap entry point is the size of 4 sparc instructions (or 4 bytes
- * * 4 insns = 16 bytes). There are 128 hardware traps (some undefined
- * or unimplemented) and 128 software traps (sys-calls, etc.).
- *
- * One of the instructions must be a branch. More often than not this
- * will be to a trap handler entry point because it is completely
- * impossible to handle any trap in 4 insns. I welcome anyone to
- * challenge this theory. :-)
- *
- * On entry into this table the hardware has loaded the program counter
- * at which the trap occurred into register %l1 and the next program
- * counter into %l2, this way we can return from the trap with a simple
- *
- * jmp %l1; rett %l2 ! poof...
- *
- * after properly servicing the trap. It wouldn't be a bad idea to load
- * some more information into the local regs since we have technically
- * 2 or 3 instructions to play with besides the jmp to the 'real' trap
- * handler (one can even go in the delay slot). For now I am going to put
- * the %psr (processor status register) and the trap-type value in %l0
- * and %l3 respectively. Also, for IRQ's I'll put the level in %l4.
- */
-
+ /* The Sparc trap table, bootloader gives us control at _start. */
.text
-
- .globl start
- .globl _start /* warning, solaris hack */
+ .globl start, _stext, _start, __stext
.globl C_LABEL(trapbase)
_start: /* danger danger */
+__stext:
+_stext:
start:
C_LABEL(trapbase):
-/* XXX Grrr, this table is basically sun4c specific, sort of... XXX */
/* We get control passed to us here at t_zero. */
t_zero: b gokernel; nop; nop; nop;
-
-t_tflt: TRAP_ENTRY(0x1, sparc_text_fault) /* Inst. Access Exception */
-t_bins: TRAP_ENTRY(0x2, bad_instruction) /* Illegal Instruction */
-t_pins: TRAP_ENTRY(0x3, bad_instruction) /* Privileged Instruction */
-t_fpd: TRAP_ENTRY(0x4, fpd_trap_handler) /* Floating Point Disabled */
-t_wovf: TRAP_ENTRY(0x5, spill_window_entry) /* Window Overflow */
-t_wunf: TRAP_ENTRY(0x6, fill_window_entry) /* 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: TRAP_ENTRY(0x9, sparc_data_fault) /* 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: TRAP_ENTRY(0xc, bad_trap_handler) /* Undefined... */
-t_badd: TRAP_ENTRY(0xd, bad_trap_handler) /* Undefined... */
-t_bade: TRAP_ENTRY(0xe, bad_trap_handler) /* Undefined... */
-t_badf: TRAP_ENTRY(0xf, bad_trap_handler) /* Undefined... */
-t_bad10:TRAP_ENTRY(0x10, bad_trap_handler) /* Undefined... */
-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_TIMER /* 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 */
-t_nmi: NMI_TRAP /* Level 15 (NMI) */
-t_racc: TRAP_ENTRY(0x20, do_reg_access) /* General Register Access Error */
-t_iacce:TRAP_ENTRY(0x21, do_iacc_error) /* Instruction Access Error */
-t_bad22:TRAP_ENTRY(0x22, bad_trap_handler) /* Undefined... */
-t_bad23:TRAP_ENTRY(0x23, bad_trap_handler) /* Undefined... */
-t_cpdis:TRAP_ENTRY(0x24, do_cp_disabled) /* Co-Processor Disabled */
-t_uflsh:TRAP_ENTRY(0x25, do_bad_flush) /* Unimplemented FLUSH inst. */
-t_bad26:TRAP_ENTRY(0x26, bad_trap_handler) /* Undefined... */
-t_bad27:TRAP_ENTRY(0x27, bad_trap_handler) /* Undefined... */
-t_cpexc:TRAP_ENTRY(0x28, do_cp_exception) /* Co-Processor Exception */
-t_dacce:TRAP_ENTRY(0x29, do_dacc_error) /* Data Access Error */
-t_hwdz: TRAP_ENTRY(0x2a, do_hw_divzero) /* Division by zero, you lose... */
-t_dserr:TRAP_ENTRY(0x2b, do_dstore_err) /* Data Store Error */
-t_daccm:TRAP_ENTRY(0x2c, do_dacc_mmu_miss) /* Data Access MMU-Miss */
-t_bad2d:TRAP_ENTRY(0x2d, bad_trap_handler) /* Undefined... */
-t_bad2e:TRAP_ENTRY(0x2e, bad_trap_handler) /* Undefined... */
-t_bad2f:TRAP_ENTRY(0x2f, bad_trap_handler) /* Undefined... */
-t_bad30:TRAP_ENTRY(0x30, bad_trap_handler) /* Undefined... */
-t_bad31:TRAP_ENTRY(0x31, bad_trap_handler) /* Undefined... */
-t_bad32:TRAP_ENTRY(0x32, bad_trap_handler) /* Undefined... */
-t_bad33:TRAP_ENTRY(0x33, bad_trap_handler) /* Undefined... */
-t_bad34:TRAP_ENTRY(0x34, bad_trap_handler) /* Undefined... */
-t_bad35:TRAP_ENTRY(0x35, bad_trap_handler) /* Undefined... */
-t_bad36:TRAP_ENTRY(0x36, bad_trap_handler) /* Undefined... */
-t_bad37:TRAP_ENTRY(0x37, bad_trap_handler) /* Undefined... */
-t_bad38:TRAP_ENTRY(0x38, bad_trap_handler) /* Undefined... */
-t_bad39:TRAP_ENTRY(0x39, bad_trap_handler) /* Undefined... */
-t_bad3a:TRAP_ENTRY(0x3a, bad_trap_handler) /* Undefined... */
-t_bad3b:TRAP_ENTRY(0x3b, bad_trap_handler) /* Undefined... */
-t_iaccm:TRAP_ENTRY(0x3c, do_iacc_mmu_miss) /* Instruction Access MMU-Miss */
-t_bad3d:TRAP_ENTRY(0x3d, bad_trap_handler) /* Undefined... */
-t_bad3e:TRAP_ENTRY(0x3e, bad_trap_handler) /* Undefined... */
-t_bad3f:TRAP_ENTRY(0x3f, bad_trap_handler) /* Undefined... */
-t_bad40:TRAP_ENTRY(0x40, bad_trap_handler) /* Undefined... */
-t_bad41:TRAP_ENTRY(0x41, bad_trap_handler) /* Undefined... */
-t_bad42:TRAP_ENTRY(0x42, bad_trap_handler) /* Undefined... */
-t_bad43:TRAP_ENTRY(0x43, bad_trap_handler) /* Undefined... */
-t_bad44:TRAP_ENTRY(0x44, bad_trap_handler) /* Undefined... */
-t_bad45:TRAP_ENTRY(0x45, bad_trap_handler) /* Undefined... */
-t_bad46:TRAP_ENTRY(0x46, bad_trap_handler) /* Undefined... */
-t_bad47:TRAP_ENTRY(0x47, bad_trap_handler) /* Undefined... */
-t_bad48:TRAP_ENTRY(0x48, bad_trap_handler) /* Undefined... */
-t_bad49:TRAP_ENTRY(0x49, bad_trap_handler) /* Undefined... */
-t_bad4a:TRAP_ENTRY(0x4a, bad_trap_handler) /* Undefined... */
-t_bad4b:TRAP_ENTRY(0x4b, bad_trap_handler) /* Undefined... */
-t_bad4c:TRAP_ENTRY(0x4c, bad_trap_handler) /* Undefined... */
-t_bad4d:TRAP_ENTRY(0x4d, bad_trap_handler) /* Undefined... */
-t_bad4e:TRAP_ENTRY(0x4e, bad_trap_handler) /* Undefined... */
-t_bad4f:TRAP_ENTRY(0x4f, bad_trap_handler) /* Undefined... */
-t_bad50:TRAP_ENTRY(0x50, bad_trap_handler) /* Undefined... */
-t_bad51:TRAP_ENTRY(0x51, bad_trap_handler) /* Undefined... */
-t_bad52:TRAP_ENTRY(0x52, bad_trap_handler) /* Undefined... */
-t_bad53:TRAP_ENTRY(0x53, bad_trap_handler) /* Undefined... */
-t_bad54:TRAP_ENTRY(0x54, bad_trap_handler) /* Undefined... */
-t_bad55:TRAP_ENTRY(0x55, bad_trap_handler) /* Undefined... */
-t_bad56:TRAP_ENTRY(0x56, bad_trap_handler) /* Undefined... */
-t_bad57:TRAP_ENTRY(0x57, bad_trap_handler) /* Undefined... */
-t_bad58:TRAP_ENTRY(0x58, bad_trap_handler) /* Undefined... */
-t_bad59:TRAP_ENTRY(0x59, bad_trap_handler) /* Undefined... */
-t_bad5a:TRAP_ENTRY(0x5a, bad_trap_handler) /* Undefined... */
-t_bad5b:TRAP_ENTRY(0x5b, bad_trap_handler) /* Undefined... */
-t_bad5c:TRAP_ENTRY(0x5c, bad_trap_handler) /* Undefined... */
-t_bad5d:TRAP_ENTRY(0x5d, bad_trap_handler) /* Undefined... */
-t_bad5e:TRAP_ENTRY(0x5e, bad_trap_handler) /* Undefined... */
-t_bad5f:TRAP_ENTRY(0x5f, bad_trap_handler) /* Undefined... */
-t_bad60:TRAP_ENTRY(0x60, bad_trap_handler) /* Impl-Dep Exception */
-t_bad61:TRAP_ENTRY(0x61, bad_trap_handler) /* Impl-Dep Exception */
-t_bad62:TRAP_ENTRY(0x62, bad_trap_handler) /* Impl-Dep Exception */
-t_bad63:TRAP_ENTRY(0x63, bad_trap_handler) /* Impl-Dep Exception */
-t_bad64:TRAP_ENTRY(0x64, bad_trap_handler) /* Impl-Dep Exception */
-t_bad65:TRAP_ENTRY(0x65, bad_trap_handler) /* Impl-Dep Exception */
-t_bad66:TRAP_ENTRY(0x66, bad_trap_handler) /* Impl-Dep Exception */
-t_bad67:TRAP_ENTRY(0x67, bad_trap_handler) /* Impl-Dep Exception */
-t_bad68:TRAP_ENTRY(0x68, bad_trap_handler) /* Impl-Dep Exception */
-t_bad69:TRAP_ENTRY(0x69, bad_trap_handler) /* Impl-Dep Exception */
-t_bad6a:TRAP_ENTRY(0x6a, bad_trap_handler) /* Impl-Dep Exception */
-t_bad6b:TRAP_ENTRY(0x6b, bad_trap_handler) /* Impl-Dep Exception */
-t_bad6c:TRAP_ENTRY(0x6c, bad_trap_handler) /* Impl-Dep Exception */
-t_bad6d:TRAP_ENTRY(0x6d, bad_trap_handler) /* Impl-Dep Exception */
-t_bad6e:TRAP_ENTRY(0x6e, bad_trap_handler) /* Impl-Dep Exception */
-t_bad6f:TRAP_ENTRY(0x6f, bad_trap_handler) /* Impl-Dep Exception */
-t_bad70:TRAP_ENTRY(0x70, bad_trap_handler) /* Impl-Dep Exception */
-t_bad71:TRAP_ENTRY(0x71, bad_trap_handler) /* Impl-Dep Exception */
-t_bad72:TRAP_ENTRY(0x72, bad_trap_handler) /* Impl-Dep Exception */
-t_bad73:TRAP_ENTRY(0x73, bad_trap_handler) /* Impl-Dep Exception */
-t_bad74:TRAP_ENTRY(0x74, bad_trap_handler) /* Impl-Dep Exception */
-t_bad75:TRAP_ENTRY(0x75, bad_trap_handler) /* Impl-Dep Exception */
-t_bad76:TRAP_ENTRY(0x76, bad_trap_handler) /* Impl-Dep Exception */
-t_bad77:TRAP_ENTRY(0x77, bad_trap_handler) /* Impl-Dep Exception */
-t_bad78:TRAP_ENTRY(0x78, bad_trap_handler) /* Impl-Dep Exception */
-t_bad79:TRAP_ENTRY(0x79, bad_trap_handler) /* Impl-Dep Exception */
-t_bad7a:TRAP_ENTRY(0x7a, bad_trap_handler) /* Impl-Dep Exception */
-t_bad7b:TRAP_ENTRY(0x7b, bad_trap_handler) /* Impl-Dep Exception */
-t_bad7c:TRAP_ENTRY(0x7c, bad_trap_handler) /* Impl-Dep Exception */
-t_bad7d:TRAP_ENTRY(0x7d, bad_trap_handler) /* Impl-Dep Exception */
-t_bad7e:TRAP_ENTRY(0x7e, bad_trap_handler) /* Impl-Dep Exception */
-t_bad7f:TRAP_ENTRY(0x7f, bad_trap_handler) /* Impl-Dep Exception */
-t_sunos:SUNOS_SYSCALL_TRAP /* SunOS System Call */
-t_sbkpt:TRAP_ENTRY(0x81, bad_trap_handler) /* Software Breakpoint */
-t_divz: TRAP_ENTRY(0x82, bad_trap_handler) /* Divide by zero trap */
-t_flwin:TRAP_ENTRY(0x83, bad_trap_handler) /* Flush Windows Trap */
-t_clwin:TRAP_ENTRY(0x84, bad_trap_handler) /* Clean Windows Trap */
-t_rchk: TRAP_ENTRY(0x85, bad_trap_handler) /* Range Check */
-t_funal:TRAP_ENTRY(0x86, bad_trap_handler) /* Fix Unaligned Access Trap */
-t_iovf: TRAP_ENTRY(0x87, bad_trap_handler) /* Integer Overflow Trap */
-t_slowl:SOLARIS_SYSCALL_TRAP /* Slowaris System Call */
-t_netbs:NETBSD_SYSCALL_TRAP /* Net-B.S. System Call */
-t_bad8a:TRAP_ENTRY(0x8a, bad_trap_handler) /* Software Trap */
-t_bad8b:TRAP_ENTRY(0x8b, bad_trap_handler) /* Software Trap */
-t_bad8c:TRAP_ENTRY(0x8c, bad_trap_handler) /* Software Trap */
-t_bad8d:TRAP_ENTRY(0x8d, bad_trap_handler) /* Software Trap */
-t_bad8e:TRAP_ENTRY(0x8e, bad_trap_handler) /* Software Trap */
-t_bad8f:TRAP_ENTRY(0x8f, bad_trap_handler) /* Software Trap */
-t_linux:LINUX_SYSCALL_TRAP /* Linux System Call */
-t_bad91:TRAP_ENTRY(0x91, bad_trap_handler) /* Software Trap */
-t_bad92:TRAP_ENTRY(0x92, bad_trap_handler) /* Software Trap */
-t_bad93:TRAP_ENTRY(0x93, bad_trap_handler) /* Software Trap */
-t_bad94:TRAP_ENTRY(0x94, bad_trap_handler) /* Software Trap */
-t_bad95:TRAP_ENTRY(0x95, bad_trap_handler) /* Software Trap */
-t_bad96:TRAP_ENTRY(0x96, bad_trap_handler) /* Software Trap */
-t_bad97:TRAP_ENTRY(0x97, bad_trap_handler) /* Software Trap */
-t_bad98:TRAP_ENTRY(0x98, bad_trap_handler) /* Software Trap */
-t_bad99:TRAP_ENTRY(0x99, bad_trap_handler) /* Software Trap */
-t_bad9a:TRAP_ENTRY(0x9a, bad_trap_handler) /* Software Trap */
-t_bad9b:TRAP_ENTRY(0x9b, bad_trap_handler) /* Software Trap */
-t_bad9c:TRAP_ENTRY(0x9c, bad_trap_handler) /* Software Trap */
-t_bad9d:TRAP_ENTRY(0x9d, bad_trap_handler) /* Software Trap */
-t_bad9e:TRAP_ENTRY(0x9e, bad_trap_handler) /* Software Trap */
-t_bad9f:TRAP_ENTRY(0x9f, bad_trap_handler) /* Software Trap */
-t_getcc:GETCC_TRAP /* Get Condition Codes */
-t_setcc:SETCC_TRAP /* Set Condition Codes */
-t_bada2:TRAP_ENTRY(0xa2, bad_trap_handler) /* Software Trap */
-t_bada3:TRAP_ENTRY(0xa3, bad_trap_handler) /* Software Trap */
-t_bada4:TRAP_ENTRY(0xa4, bad_trap_handler) /* Software Trap */
-t_bada5:TRAP_ENTRY(0xa5, bad_trap_handler) /* Software Trap */
-t_bada6:TRAP_ENTRY(0xa6, bad_trap_handler) /* Software Trap */
-t_bada7:TRAP_ENTRY(0xa7, bad_trap_handler) /* Software Trap */
-t_bada8:TRAP_ENTRY(0xa8, bad_trap_handler) /* Software Trap */
-t_bada9:TRAP_ENTRY(0xa9, bad_trap_handler) /* Software Trap */
-t_badaa:TRAP_ENTRY(0xaa, bad_trap_handler) /* Software Trap */
-t_badab:TRAP_ENTRY(0xab, bad_trap_handler) /* Software Trap */
-t_badac:TRAP_ENTRY(0xac, bad_trap_handler) /* Software Trap */
-t_badad:TRAP_ENTRY(0xad, bad_trap_handler) /* Software Trap */
-t_badae:TRAP_ENTRY(0xae, bad_trap_handler) /* Software Trap */
-t_badaf:TRAP_ENTRY(0xaf, bad_trap_handler) /* Software Trap */
-t_badb0:TRAP_ENTRY(0xb0, bad_trap_handler) /* Software Trap */
-t_badb1:TRAP_ENTRY(0xb1, bad_trap_handler) /* Software Trap */
-t_badb2:TRAP_ENTRY(0xb2, bad_trap_handler) /* Software Trap */
-t_badb3:TRAP_ENTRY(0xb3, bad_trap_handler) /* Software Trap */
-t_badb4:TRAP_ENTRY(0xb4, bad_trap_handler) /* Software Trap */
-t_badb5:TRAP_ENTRY(0xb5, bad_trap_handler) /* Software Trap */
-t_badb6:TRAP_ENTRY(0xb6, bad_trap_handler) /* Software Trap */
-t_badb7:TRAP_ENTRY(0xb7, bad_trap_handler) /* Software Trap */
-t_badb8:TRAP_ENTRY(0xb8, bad_trap_handler) /* Software Trap */
-t_badb9:TRAP_ENTRY(0xb9, bad_trap_handler) /* Software Trap */
-t_badba:TRAP_ENTRY(0xba, bad_trap_handler) /* Software Trap */
-t_badbb:TRAP_ENTRY(0xbb, bad_trap_handler) /* Software Trap */
-t_badbc:TRAP_ENTRY(0xbc, bad_trap_handler) /* Software Trap */
-t_badbd:TRAP_ENTRY(0xbd, bad_trap_handler) /* Software Trap */
-t_badbe:TRAP_ENTRY(0xbe, bad_trap_handler) /* Software Trap */
-t_badbf:TRAP_ENTRY(0xbf, bad_trap_handler) /* Software Trap */
-t_badc0:TRAP_ENTRY(0xc0, bad_trap_handler) /* Software Trap */
-t_badc1:TRAP_ENTRY(0xc1, bad_trap_handler) /* Software Trap */
-t_badc2:TRAP_ENTRY(0xc2, bad_trap_handler) /* Software Trap */
-t_badc3:TRAP_ENTRY(0xc3, bad_trap_handler) /* Software Trap */
-t_badc4:TRAP_ENTRY(0xc4, bad_trap_handler) /* Software Trap */
-t_badc5:TRAP_ENTRY(0xc5, bad_trap_handler) /* Software Trap */
-t_badc6:TRAP_ENTRY(0xc6, bad_trap_handler) /* Software Trap */
-t_badc7:TRAP_ENTRY(0xc7, bad_trap_handler) /* Software Trap */
-t_badc8:TRAP_ENTRY(0xc8, bad_trap_handler) /* Software Trap */
-t_badc9:TRAP_ENTRY(0xc9, bad_trap_handler) /* Software Trap */
-t_badca:TRAP_ENTRY(0xca, bad_trap_handler) /* Software Trap */
-t_badcb:TRAP_ENTRY(0xcb, bad_trap_handler) /* Software Trap */
-t_badcc:TRAP_ENTRY(0xcc, bad_trap_handler) /* Software Trap */
-t_badcd:TRAP_ENTRY(0xcd, bad_trap_handler) /* Software Trap */
-t_badce:TRAP_ENTRY(0xce, bad_trap_handler) /* Software Trap */
-t_badcf:TRAP_ENTRY(0xcf, bad_trap_handler) /* Software Trap */
-t_badd0:TRAP_ENTRY(0xd0, bad_trap_handler) /* Software Trap */
-t_badd1:TRAP_ENTRY(0xd1, bad_trap_handler) /* Software Trap */
-t_badd2:TRAP_ENTRY(0xd2, bad_trap_handler) /* Software Trap */
-t_badd3:TRAP_ENTRY(0xd3, bad_trap_handler) /* Software Trap */
-t_badd4:TRAP_ENTRY(0xd4, bad_trap_handler) /* Software Trap */
-t_badd5:TRAP_ENTRY(0xd5, bad_trap_handler) /* Software Trap */
-t_badd6:TRAP_ENTRY(0xd6, bad_trap_handler) /* Software Trap */
-t_badd7:TRAP_ENTRY(0xd7, bad_trap_handler) /* Software Trap */
-t_badd8:TRAP_ENTRY(0xd8, bad_trap_handler) /* Software Trap */
-t_badd9:TRAP_ENTRY(0xd9, bad_trap_handler) /* Software Trap */
-t_badda:TRAP_ENTRY(0xda, bad_trap_handler) /* Software Trap */
-t_baddb:TRAP_ENTRY(0xdb, bad_trap_handler) /* Software Trap */
-t_baddc:TRAP_ENTRY(0xdc, bad_trap_handler) /* Software Trap */
-t_baddd:TRAP_ENTRY(0xdd, bad_trap_handler) /* Software Trap */
-t_badde:TRAP_ENTRY(0xde, bad_trap_handler) /* Software Trap */
-t_baddf:TRAP_ENTRY(0xdf, bad_trap_handler) /* Software Trap */
-t_bade0:TRAP_ENTRY(0xe0, bad_trap_handler) /* Software Trap */
-t_bade1:TRAP_ENTRY(0xe1, bad_trap_handler) /* Software Trap */
-t_bade2:TRAP_ENTRY(0xe2, bad_trap_handler) /* Software Trap */
-t_bade3:TRAP_ENTRY(0xe3, bad_trap_handler) /* Software Trap */
-t_bade4:TRAP_ENTRY(0xe4, bad_trap_handler) /* Software Trap */
-t_bade5:TRAP_ENTRY(0xe5, bad_trap_handler) /* Software Trap */
-t_bade6:TRAP_ENTRY(0xe6, bad_trap_handler) /* Software Trap */
-t_bade7:TRAP_ENTRY(0xe7, bad_trap_handler) /* Software Trap */
-t_bade8:TRAP_ENTRY(0xe8, bad_trap_handler) /* Software Trap */
-t_bade9:TRAP_ENTRY(0xe9, bad_trap_handler) /* Software Trap */
-t_badea:TRAP_ENTRY(0xea, bad_trap_handler) /* Software Trap */
-t_badeb:TRAP_ENTRY(0xeb, bad_trap_handler) /* Software Trap */
-t_badec:TRAP_ENTRY(0xec, bad_trap_handler) /* Software Trap */
-t_baded:TRAP_ENTRY(0xed, bad_trap_handler) /* Software Trap */
-t_badee:TRAP_ENTRY(0xee, bad_trap_handler) /* Software Trap */
-t_badef:TRAP_ENTRY(0xef, bad_trap_handler) /* Software Trap */
-t_badf0:TRAP_ENTRY(0xf0, bad_trap_handler) /* Software Trap */
-t_badf1:TRAP_ENTRY(0xf1, bad_trap_handler) /* Software Trap */
-t_badf2:TRAP_ENTRY(0xf2, bad_trap_handler) /* Software Trap */
-t_badf3:TRAP_ENTRY(0xf3, bad_trap_handler) /* Software Trap */
-t_badf4:TRAP_ENTRY(0xf4, bad_trap_handler) /* Software Trap */
-t_badf5:TRAP_ENTRY(0xf5, bad_trap_handler) /* Software Trap */
-t_badf6:TRAP_ENTRY(0xf6, bad_trap_handler) /* Software Trap */
-t_badf7:TRAP_ENTRY(0xf7, bad_trap_handler) /* Software Trap */
-t_badf8:TRAP_ENTRY(0xf8, bad_trap_handler) /* Software Trap */
-t_badf9:TRAP_ENTRY(0xf9, bad_trap_handler) /* Software Trap */
-t_badfa:TRAP_ENTRY(0xfa, bad_trap_handler) /* Software Trap */
-t_badfb:TRAP_ENTRY(0xfb, bad_trap_handler) /* Software Trap */
-t_badfc:TRAP_ENTRY(0xfc, bad_trap_handler) /* Software Trap */
-t_badfd:TRAP_ENTRY(0xfd, bad_trap_handler) /* Software Trap */
-dbtrap: TRAP_ENTRY(0xfe, bad_trap_handler) /* Debugger/PROM breakpoint #1 */
-dbtrap2:TRAP_ENTRY(0xff, bad_trap_handler) /* Debugger/PROM breakpoint #2 */
+t_tflt: TRAP_ENTRY(0x1, sparc_fault) /* 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: TRAP_ENTRY(0x9, sparc_fault) /* 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_SOFTINT(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_SOFTINT(4) /* IRQ Software Level 4 */
+t_irq5: TRAP_ENTRY_INTERRUPT(5) /* IRQ SBUS/Ethernet Level 5 */
+t_irq6: TRAP_ENTRY_SOFTINT(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 */
+t_nmi: NMI_TRAP /* Level 15 (NMI) */
+t_racc: TRAP_ENTRY(0x20, do_reg_access) /* General Register Access Error */
+t_iacce:TRAP_ENTRY(0x21, sparc_fault) /* Instr Access Error */
+t_bad22:BAD_TRAP(0x22) BAD_TRAP(0x23)
+t_cpdis:TRAP_ENTRY(0x24, do_cp_disabled) /* Co-Processor Disabled */
+t_uflsh:TRAP_ENTRY(0x25, do_bad_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:TRAP_ENTRY(0x29, sparc_fault) /* Data Access Error */
+t_hwdz: TRAP_ENTRY(0x2a, do_hw_divzero) /* Division by zero, you lose... */
+t_dserr:TRAP_ENTRY(0x2b, sparc_fault) /* Data Store Error */
+t_daccm:TRAP_ENTRY(0x2c, sparc_fault) /* 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:TRAP_ENTRY(0x3c, sparc_fault) /* 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_sunos:SUNOS_SYSCALL_TRAP /* SunOS System Call */
+t_sbkpt:BAD_TRAP(0x81) /* Software Breakpoint/KGDB */
+t_divz: BAD_TRAP(0x82) /* 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_slowl:SOLARIS_SYSCALL_TRAP /* Slowaris System Call */
+t_netbs:NETBSD_SYSCALL_TRAP /* 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_bada2:BAD_TRAP(0xa2) BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6)
+t_bada7:BAD_TRAP(0xa7) 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) BAD_TRAP(0xfd)
+dbtrap: BAD_TRAP(0xfe) /* Debugger/PROM breakpoint #1 */
+dbtrap2:BAD_TRAP(0xff) /* Debugger/PROM breakpoint #2 */
.globl C_LABEL(end_traptable)
C_LABEL(end_traptable):
@@ -422,8 +185,6 @@
/* This was the only reasonable way I could think of to properly align
* these page-table data structures.
- *
- * XXX swapper_pg_dir is going to have to be 'per-CPU' for SMP support
*/
.globl C_LABEL(auxio_reg_addr)
@@ -435,11 +196,15 @@
.globl C_LABEL(int_reg_addr)
C_LABEL(int_reg_addr): .skip (PAGE_SIZE*5)
+ .globl C_LABEL(bootup_user_stack)
+ .globl C_LABEL(bootup_kernel_stack)
.globl C_LABEL(pg0)
.globl C_LABEL(empty_bad_page)
.globl C_LABEL(empty_bad_page_table)
.globl C_LABEL(empty_zero_page)
.globl C_LABEL(swapper_pg_dir)
+C_LABEL(bootup_user_stack): .skip 0x1000
+C_LABEL(bootup_kernel_stack): .skip 0x1000
C_LABEL(swapper_pg_dir): .skip 0x1000
C_LABEL(pg0): .skip 0x1000
C_LABEL(empty_bad_page): .skip 0x1000
@@ -449,19 +214,7 @@
/* 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. We also get a debug structure of some sort from
- * the boot loader (or is it the prom?) in %o1. Finally a call back vector
- * is passed in %o2. I think this is how you register yourself with a
- * debugger. I do know that it wants my %o7 (return PC - 8) as it's
- * first argument. I will poke around and figure out what the debug
- * vector is, it could contain useful stuff.
- */
-
-/* Grrr, in order to be Sparc ABI complient, the kernel has to live in
- * an address space above 0xe0000000 ;( Must remain position independant
- * until we 'remap' ourselves from low to high addresses. We only map the
- * first 3MB of addresses into upper ram as that is how much the PROM
- * promises to set up for us.
+ * a v0, v2, or v3 prom.
*/
gokernel:
/* Ok, it's nice to know, as early as possible, if we
@@ -477,31 +230,28 @@
/* XXX Sparc V9 detection goes here XXX */
- or %g0, %o7, %g4 ! Save %o7
+ mov %o7, %g4 ! Save %o7
/* Jump to it, and pray... */
current_pc:
call 1f
- nop
+ nop
1:
- or %g0, %o7, %g3
+ mov %o7, %g3
got_pc:
- or %g0, %g4, %o7 /* Previous %o7. */
+ mov %g4, %o7 /* Previous %o7. */
- or %g0, %o0, %l0 ! stash away romvec
- or %g0, %o0, %g7 ! put it here too
- or %g0, %o1, %l1 ! stash away debug_vec too
- rd %psr, %l2 ! Save psr
- rd %wim, %l3 ! wim
- rd %tbr, %l4 ! tbr
- or %g0, %o2, %l5 ! and the possible magic func
+ 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
@@ -511,10 +261,10 @@
*/
set PAGE_OFFSET, %l6
b copy_prom_lvl14
- nop
+ nop
already_mapped:
- or %g0, %g0, %l6
+ mov 0, %l6
/* Copy over the Prom's level 14 clock handler. */
copy_prom_lvl14:
@@ -544,46 +294,6 @@
ldd [%g2 + 0x18], %g4
std %g4, [%g3 + 0x18]
-copy_prom_done:
- ld [%o0 + 0x4], %g1
- and %g1, 0x3, %g1
- subcc %g1, 0x0, %g0
- be set_sane_psr ! Not on v0 proms
- nop
-
- subcc %o2, 0x0, %g0 ! check for boot routine pointer
- bz set_sane_psr
- nop
- jmpl %o2, %o7 ! call boot setup func
- add %o7, 0x8, %o0
-
-set_sane_psr:
- /* Traps are on, kadb can be tracing through here. But
- * we have no clue what the PIL is. So we set up a sane
- * %psr, but preserve CWP or our locals could disappear!
- */
- rd %psr, %g2
- and %g2, 0x1f, %g2 ! %g2 has CWP now
- set (PSR_S|PSR_PIL), %g1 ! Supervisor + PIL high
- or %g1, %g2, %g1 ! mix mix mix
- wr %g1, 0x0, %psr ! let PIL set in
- wr %g1, PSR_ET, %psr ! now turn on traps
-
- /* A note about the last two instructions...
- * If you are going to increase PIL and turn on
- * traps at the same time you are asking for trouble.
- * You MUST set a %psr with traps off containing
- * your new PIL, then turn on the ET bit with the
- * next write. On certain buggy Sparc chips if you
- * set both at the same time you can get a Watchdog
- * Reset under certain conditions. This is no fun.
- * Basically the PIL bits get there before the
- * EnableTrap bit does or something like that.
- */
-
- /* Insane asylum... */
- WRITE_PAUSE
-
/* Must determine whether we are on a sun4c MMU, SRMMU, or SUN4/400 MUTANT
* MMU so we can remap ourselves properly. DONT TOUCH %l0 thru %l5 in these
* remapping routines, we need their values afterwards!
@@ -593,27 +303,28 @@
/* Now check whether we are already mapped, if we
* are we can skip all this garbage coming up.
*/
- subcc %l6, 0x0, %g0
- bz go_to_highmem ! this will be a nop then
- nop
+copy_prom_done:
+ cmp %l6, 0
+ be go_to_highmem ! this will be a nop then
+ nop
- sethi %hi(LOAD_ADDR), %g6
- subcc %g7, %g6, %g0
+ set LOAD_ADDR, %g6
+ cmp %g7, %g6
bne remap_not_a_sun4 ! This is not a Sun4
- nop
+ 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
+ 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 ;-)
- subcc %g1, 0x0, %g0
- bz sun4c_remap ! A sun4c MMU or normal Sun4
- nop
+ 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
@@ -621,7 +332,7 @@
and %g2, %g3, %g3
subcc %g3, 0x0, %g0
bz srmmu_nviking
- nop
+ nop
/* Figure out what kind of viking we are on.
* We need to know if we have to play with the
@@ -636,7 +347,7 @@
and %g2, %g3, %g3
subcc %g3, 0x0, %g0
bnz srmmu_nviking ! is in mbus mode
- nop
+ nop
rd %psr, %g3 ! DONT TOUCH %g3
andn %g3, PSR_ET, %g2
@@ -702,7 +413,7 @@
* place to another... Jump to high memory.
*/
b go_to_highmem
- nop
+ nop
/* This works on viking's in Mbus mode and all
* other MBUS modules. It is virtually the same as
@@ -721,7 +432,7 @@
add %g1, 0x3c0, %g3 ! XXX AWAY WITH IMPERICALS
sta %g2, [%g3] ASI_M_BYPASS ! place at KERNBASE entry
b go_to_highmem
- nop ! wheee....
+ nop ! wheee....
/* This remaps the kernel on Sun4/4xx machines
* that have the Sun Mutant Three Level MMU.
@@ -754,18 +465,16 @@
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
+ add %g3, %l6, %g3 ! delay, Move up low ptr
b go_to_highmem ! Jump to high memory.
- nop
+ nop
/* The following works for normal (ie. non Sun4/400) Sun4 MMU's */
sun4c_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
+ 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
@@ -773,20 +482,20 @@
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
+ 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
- jmp %g1
- nop
+ jmpl %g1, %g0
+ nop
/* Acquire boot time privileged register values, this will help debugging.
* I figure out and store nwindows and nwindowsm1 later on.
*/
execute_in_high_mem:
- or %g0, %l0, %o0 ! put back romvec
- or %g0, %l1, %o1 ! and debug_vec
+ mov %l0, %o0 ! put back romvec
+ mov %l1, %o1 ! and debug_vec
sethi %hi( C_LABEL(prom_vector_p) ), %g1
st %o0, [%g1 + %lo( C_LABEL(prom_vector_p) )]
@@ -797,14 +506,14 @@
ld [%o0 + 0x4], %o3
and %o3, 0x3, %o5 ! get the version
- subcc %o3, 0x2, %g0 ! a v2 prom?
+ cmp %o3, 0x2 ! a v2 prom?
be found_version
- nop
+ nop
/* paul@sfe.com.au */
- subcc %o3, 0x3, %g0 ! a v3 prom?
+ cmp %o3, 0x3 ! a v3 prom?
be found_version
- nop
+ 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
@@ -812,33 +521,21 @@
* trust their own "OpenBoot" specifications.
*/
- sethi %hi(LOAD_ADDR), %g6
- subcc %o0, %g6, %g0 ! an old sun4?
+ set LOAD_ADDR, %g6
+ cmp %o0, %g6 ! an old sun4?
be no_sun4_here
- nop
+ nop
found_version:
-/* Get the machine type via the mysterious romvec node operations.
- * Here we can find out whether we are on a sun4, sun4c, sun4m,
- * sun4d, or a sun4e. The "nodes" are set up as a bunch of n-ary trees
- * which you can traverse to get information about devices and such.
- * The information acquisition happens via the node-ops which are
- * defined in the openprom.h header file. Of particular interest
- * is the 'nextnode(int node)' function as it does the smart thing when
- * presented with a value of '0', it gives you the root node in the
- * tree. These node integers probably offset into some internal prom
- * pointer table the openboot has. It's completely undocumented, so
- * I'm not about to go sifting through the prom address space, but may
- * do so if I get suspicious enough. :-)
- */
+/* Get the machine type via the mysterious romvec node operations. */
or %g0, %g7, %l1
add %l1, 0x1c, %l1
ld [%l1], %l0
ld [%l0], %l0
call %l0
- or %g0, %g0, %o0 ! next_node(0) = first_node
+ or %g0, %g0, %o0 ! next_node(0) = first_node
or %o0, %g0, %g6
sethi %hi( C_LABEL(cputypvar) ), %o1 ! First node has cpu-arch
@@ -848,13 +545,13 @@
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
+ 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
+ nop
or %g6, %g0, %o0
sethi %hi( C_LABEL(cputypvar_sun4m) ), %o1
@@ -864,55 +561,47 @@
ld [%l1], %l0
ld [%l0 + 0xc], %l0
call %l0
- nop
+ nop
got_prop:
- sethi %hi( C_LABEL(cputypval) ), %o2
- or %o2, %lo( C_LABEL(cputypval) ), %o2
-
+ set C_LABEL(cputypval), %o2
ldub [%o2 + 0x4], %l1
- subcc %l1, 'c', %g0 ! We already know we are not
+
+ cmp %l1, 'c' ! We already know we are not
be 1f ! on a plain sun4 because of
- nop ! the check for 0x4000 in %o0
- subcc %l1, 'm', %g0 ! at start
+ nop ! the check for 0x4000 in %o0
+
+ cmp %l1, 'm' ! at start
be 1f
- nop
+ nop
- subcc %l1, 'd', %g0
+ cmp %l1, 'd'
be no_sun4d_here ! God bless the person who
- nop ! tried to run this on sun4d.
+ nop ! tried to run this on sun4d.
- subcc %l1, 'e', %g0
+ cmp %l1, 'e'
be no_sun4e_here ! Could be a sun4e.
- nop
+ nop
b no_sun4u_here ! AIEEE, a V9 sun4u...
- nop
+ nop
1:
- or %g0, PAGE_SHIFT, %g5
-
- sethi %hi( C_LABEL(cputypval) ), %l1
- or %l1, %lo( C_LABEL(cputypval) ), %l1
+ set C_LABEL(cputypval), %l1
ldub [%l1 + 0x4], %l1
- subcc %l1, 'm', %g0 ! Test for sun4d, sun4e ?
+ cmp %l1, 'm' ! Test for sun4d, sun4e ?
be sun4m_init
- nop
+ nop
- sethi %hi(AC_CONTEXT), %g1 ! kernel context, safe now
- ! the only valid context
- ! until we call paging_init()
+ /* Jump into mmu context zero. */
+ set AC_CONTEXT, %g1
stba %g0, [%g1] ASI_CONTROL
b sun4c_continue_boot
- nop
+ nop
sun4m_init:
-/* P3: I just do not know what to do here. But I do know that ASI_CONTROL
- * will not serve on sun4m. Also I do not want to smash the current MMU
- * setup until we call paging_init().
- */
/* 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
@@ -920,22 +609,28 @@
*/
/* This sucks, aparently this makes Vikings call prom panic, will fix later */
- set (0x40000000), %o1
- rd %psr, %o0
- andcc %o0, %o1, %g0
- bne sun4c_continue_boot ! quick hack
- nop
+ 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
-clr_srmmu_fregs:
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
+ nop
sun4c_continue_boot:
@@ -948,141 +643,133 @@
sethi %hi( C_LABEL(cputyp) ), %o0
st %g4, [%o0 + %lo( C_LABEL(cputyp) )]
- /* Turn on PreviousSupervisor, Supervisor, EnableFloating,
- * and all the PIL bits. Also puts us in register window
- * zero.
+ /* Turn on Supervisor, EnableFloating, and all the PIL bits.
+ * Also puts us in register window zero with traps off.
*/
- sethi %hi(PSR_PS | PSR_S | PSR_PIL | PSR_EF), %g2
- or %g2, %lo(PSR_PS | PSR_S | PSR_PIL | PSR_EF), %g2
+ set (PSR_PS | PSR_S | PSR_PIL | PSR_EF), %g2
wr %g2, 0x0, %psr
WRITE_PAUSE
- wr %g0, 0x2, %wim ! Make window 1 invalid.
- WRITE_PAUSE
-
- /* Initialize the WIM value for init_task. */
- or %g0, 0x1, %g1
- sethi %hi( C_LABEL(current) + THREAD_WIM), %g2
- st %g1, [%g2 + %lo( C_LABEL(current) + THREAD_WIM)]
-
-/* I want a kernel stack NOW! */
-/* Grrr, gotta be real careful about alignment here */
-
- set ( C_LABEL(init_user_stack) + PAGE_SIZE - 96 - 96 - 80), %g1
- andn %g1, 0x7, %g1
- or %g1, 0x0, %fp
- add %fp, (96+80), %sp
-
- /* Enable traps. */
- rd %psr, %l0
- wr %l0, PSR_ET, %psr
- WRITE_PAUSE
-
-/*
- * Maybe the prom zeroes out our BSS section, maybe it doesn't. I certainly
- * don't know, do you?
- */
+ /* I want a kernel stack NOW! */
+ set C_LABEL(bootup_user_stack), %g1
+ add %g1, (PAGE_SIZE - STACKFRAME_SZ - TRACEREG_SZ), %sp
+ mov 0, %fp /* And for good luck */
+ /* Zero out our BSS section. */
set C_LABEL(edata) , %o0 ! First address of BSS
set C_LABEL(end) , %o1 ! Last address of BSS
-
- /* Argh, ELF gets me again... */
- andn %o0, 0x3, %o0
- andn %o1, 0x3, %o1
-
-/* Friggin' bzero() kludge. */
-
+ add %o0, 0x1, %o0
1:
- st %g0, [%o0]
- add %o0, 0x4, %o0
+ stb %g0, [%o0]
subcc %o0, %o1, %g0
bl 1b
- nop
+ add %o0, 0x1, %o0
+
+ /* Initialize the umask value for init_task just in case.
+ * But first make current_set[0] point to something useful.
+ */
+ set C_LABEL(init_task), %g4
+ set C_LABEL(current_set), %g2
+ st %g4, [%g2]
+
+ /* So now this should work. */
+ LOAD_CURRENT(g2)
+ set C_LABEL(bootup_kernel_stack), %g4
+ st %g4, [%g2 + TASK_KSTACK_PG]
+ st %g0, [%g2 + THREAD_UMASK]
/* 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.
*/
- rd %wim, %g1
- rd %psr, %g2
wr %g0, 0x0, %wim ! so we dont get a trap
- andn %g2, 0x1f, %g3
- wr %g3, 0x0, %psr
WRITE_PAUSE
+
save
+
rd %psr, %g3
+
restore
+
and %g3, 0x1f, %g3
add %g3, 0x1, %g3
- wr %g2, 0x0, %psr
- wr %g1, 0x0, %wim
- cmp %g3, 0x7
- bne,a 2f
- sethi %hi( C_LABEL(nwindows) ), %g4
+ mov 2, %g1
+ wr %g1, 0x0, %wim ! make window 1 invalid
+ WRITE_PAUSE
+ cmp %g3, 0x7
+ bne 2f
+ nop
- /* Nop out one save and one restore in the save state code
- * and system call entry if this is a seven window Sparc.
+ /* Adjust our window handling routines to
+ * do things correctly on 7 window Sparcs.
*/
- sethi %hi(nop7), %g5
- or %g5, %lo(nop7), %g5
- sethi %hi(NOP_INSN), %g6
- or %g6, %lo(NOP_INSN), %g6
- /* patch 1 */
- st %g6, [%g5]
- st %g6, [%g5 + 0x4]
- sethi %hi(rnop7), %g5
- or %g5, %lo(rnop7), %g5
- /* patch 2 */
- st %g6, [%g5]
- st %g6, [%g5 + 0x4]
- sethi %hi( C_LABEL(nwindows) ), %g4
+#define PATCH_INSN(src, dest) \
+ set src, %g5; \
+ set dest, %g6; \
+ ld [%g5], %g4; \
+ st %g4, [%g6];
+
+ /* 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)
2:
+ sethi %hi( C_LABEL(nwindows) ), %g4
st %g3, [%g4 + %lo( C_LABEL(nwindows) )] ! store final value
sub %g3, 0x1, %g3
sethi %hi( C_LABEL(nwindowsm1) ), %g4
st %g3, [%g4 + %lo( C_LABEL(nwindowsm1) )]
- /* Initialize lnx_winmask. */
- set lnx_winmask, %g4
- or %g0, 0x2, %g5
- or %g0, 0x0, %g6
-msk_loop:
- stb %g5, [%g4 + %g6]
- add %g6, 0x1, %g6
- cmp %g6, %g3
- bl,a msk_loop
- sll %g5, 0x1, %g5
- or %g0, 0x1, %g5
- stb %g5, [%g4 + %g3]
-
- /* Here we go */
+ /* Here we go, start using Linux's trap table... */
set C_LABEL(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
+ wr %g3, PSR_ET, %psr
+ WRITE_PAUSE
-/* First we call prom_init() to set up PROMLIB, then off to start_kernel() */
-/* XXX put this in setup_arch() */
+ /* First we call prom_init() to set up PROMLIB, then
+ * off to start_kernel().
+ */
sethi %hi( C_LABEL(prom_vector_p) ), %g5
- call C_LABEL(prom_init)
ld [%g5 + %lo( C_LABEL(prom_vector_p) )], %o0
-
- subcc %o0, 0x1, %g0
- be halt_me ! promlib init failed
- nop
+ call C_LABEL(prom_init)
+ nop
call C_LABEL(start_kernel)
- nop
+ nop
/* We should not get here. */
call halt_me
- nop
+ nop
/* There, happy now Adrian? */
@@ -1092,39 +779,39 @@
ld [%o1 + %lo(SUN4_PROM_VECTOR+SUN4_PRINTF)], %o1
set sun4_notsup, %o0
call %o1
- nop
+ nop
1:
ba 1b ! Cannot exit into KMON
- nop
+ nop
no_sun4d_here:
ld [%g7 + 0x68], %o1
set sun4d_notsup, %o0
call %o1
- nop
+ nop
b halt_me
- nop
+ nop
no_sun4e_here:
ld [%g7 + 0x68], %o1
set sun4e_notsup, %o0
call %o1
- nop
+ nop
b halt_me
- nop
+ nop
no_sun4u_here:
ld [%g7 + 0x68], %o1
set sun4u_notsup, %o0
call %o1
- nop
+ nop
b halt_me
- nop
+ nop
halt_me:
ld [%g7 + 0x74], %o0
call %o0 ! Get us out of here...
- nop ! Apparently Solaris is better.
+ nop ! Apparently Solaris is better.
.data
.align 4
@@ -1135,30 +822,28 @@
* gets initialized in c-code so all routines can use it.
*/
- .globl C_LABEL(prom_vector_p)
-C_LABEL(prom_vector_p): .skip 4
-
- .align 4
+ .globl C_LABEL(prom_vector_p)
+C_LABEL(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.
*/
- .globl C_LABEL(nwindows)
- .globl C_LABEL(nwindowsm1)
-C_LABEL(nwindows): .skip 4
-C_LABEL(nwindowsm1): .skip 4
-
.align 4
+ .globl C_LABEL(nwindows)
+ .globl C_LABEL(nwindowsm1)
+C_LABEL(nwindows):
+ .word 8
+C_LABEL(nwindowsm1):
+ .word 7
/* Boot time debugger vector value. We need this later on. */
- .globl C_LABEL(linux_dbvec)
-C_LABEL(linux_dbvec): .skip 4
-
.align 4
+ .globl C_LABEL(linux_dbvec)
+C_LABEL(linux_dbvec):
+ .word 0
+ .word 0
-/* Just to get the kernel through the compiler for now */
- .globl C_LABEL(floppy_track_buffer)
-C_LABEL(floppy_track_buffer):
- .fill 512*2*36,1,0
+ .align 4
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen, slshen@lbl.gov
with Sam's (original) version of this