--- /dev/null
+/*
+ * 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
+ .globl cputypval
+cputypval:
+ .asciz "sun4m"
+ .ascii " "
+
+/* Tested on SS-5, SS-10 */
+ .align 4
+cputypvar:
+ .asciz "compatible"
+
+ .align 4
+
+notsup:
+ .asciz "Sparc-Linux sun4/sun4c or MMU-less not supported\n\n"
+ .align 4
+
+sun4e_notsup:
+ .asciz "Sparc-Linux sun4e support does not exist\n\n"
+ .align 4
+
+/* The trap-table - located in the __HEAD section */
+#include "ttable_32.S"
+
+ .align PAGE_SIZE
+
+/* This was the only reasonable way I could think of to properly align
+ * these page-table data structures.
+ */
+ .globl empty_zero_page
+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
+
+/* 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
+
+ /* Validate that we are in fact running on an
+ * SRMMU based cpu.
+ */
+ set 0x4000, %g6
+ cmp %g7, %g6
+ bne not_a_sun4
+ nop
+
+halt_notsup:
+ ld [%g7 + 0x68], %o1
+ set notsup, %o0
+ sub %o0, %l6, %o0
+ call %o1
+ nop
+ ba halt_me
+ nop
+
+not_a_sun4:
+ /* It looks like this is a machine we support.
+ * Now find out what MMU we are dealing with
+ * LEON - identified by the psr.impl field
+ * Viking - identified by the psr.impl field
+ * In all other cases a sun4m srmmu.
+ * We check that the MMU is enabled in all cases.
+ */
+
+ /* Check if this is a LEON CPU */
+ rd %psr, %g3
+ srl %g3, PSR_IMPL_SHIFT, %g3
+ and %g3, PSR_IMPL_SHIFTED_MASK, %g3
+ cmp %g3, PSR_IMPL_LEON
+ be leon_remap /* It is a LEON - jump */
+ nop
+
+ /* Sanity-check, is MMU enabled */
+ lda [%g0] ASI_M_MMUREGS, %g1
+ andcc %g1, 1, %g0
+ be halt_notsup
+ nop
+
+ /* Check for a viking (TI) module. */
+ cmp %g3, PSR_IMPL_TI
+ bne srmmu_not_viking
+ 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_not_viking ! 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
+
+srmmu_not_viking:
+ /* 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.
+ */
+ 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....
+
+
+leon_remap:
+ /* Sanity-check, is MMU enabled */
+ lda [%g0] ASI_LEON_MMUREGS, %g1
+ andcc %g1, 1, %g0
+ be halt_notsup
+ nop
+
+ /* Same code as in the srmmu_not_viking case,
+ * with the LEON ASI for mmuregs
+ */
+ set AC_M_CTPR, %g1
+ lda [%g1] ASI_LEON_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....
+
+/* 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 .init.text 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)]
+
+ /* Get the machine type via the romvec
+ * getprops node operation
+ */
+ 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 ! 'compatible' tells
+ ld [%l0 + 0xc], %l0 ! that we want 'sun4x' where
+ call %l0 ! x is one of 'm', 'd' or 'e'.
+ nop ! %o2 holds pointer
+ ! to a buf where above string
+ ! will get stored by the prom.
+
+
+ /* Check value of "compatible" property.
+ * "value" => "model"
+ * leon => sparc_leon
+ * sun4m => sun4m
+ * sun4s => sun4m
+ * sun4d => sun4d
+ * sun4e => "no_sun4e_here"
+ * '*' => "no_sun4u_here"
+ * Check single letters only
+ */
+
+ set cputypval, %o2
+ /* If cputypval[0] == 'l' (lower case letter L) this is leon */
+ ldub [%o2], %l1
+ cmp %l1, 'l'
+ be leon_init
+ nop
+
+ /* Check cputypval[4] to find the sun model */
+ ldub [%o2 + 0x4], %l1
+
+ cmp %l1, 'm'
+ be sun4m_init
+ cmp %l1, 's'
+ be sun4m_init
+ cmp %l1, 'd'
+ be sun4d_init
+ 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
+
+leon_init:
+ /* LEON CPU - set boot_cpu_id */
+ sethi %hi(boot_cpu_id), %g2 ! boot-cpu index
+
+#ifdef CONFIG_SMP
+ ldub [%g2 + %lo(boot_cpu_id)], %g1
+ cmp %g1, 0xff ! unset means first CPU
+ bne leon_smp_cpu_startup ! continue only with master
+ nop
+#endif
+ /* Get CPU-ID from most significant 4-bit of ASR17 */
+ rd %asr17, %g1
+ srl %g1, 28, %g1
+
+ /* Update boot_cpu_id only on boot cpu */
+ stub %g1, [%g2 + %lo(boot_cpu_id)]
+
+ ba 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)]
+#endif
+
+ /* Fall through to sun4m_init */
+
+sun4m_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
+ * 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, PSR_IMPL_SHIFT, %o1 ! Get a type of the CPU
+
+ subcc %o1, PSR_IMPL_TI, %g0 ! TI: Viking or MicroSPARC
+ be 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 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
+
+
+continue_boot:
+
+/* Aieee, now set PC and nPC, enable traps, give ourselves a stack and it's
+ * show-time!
+ */
+ /* 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
+
+ /* If boot_cpu_id has not been setup by machine specific
+ * init-code above we default it to zero.
+ */
+ sethi %hi(boot_cpu_id), %g2
+ ldub [%g2 + %lo(boot_cpu_id)], %g3
+ cmp %g3, 0xff
+ bne 1f
+ nop
+ mov %g0, %g3
+ stub %g3, [%g2 + %lo(boot_cpu_id)]
+
+1: sll %g3, 2, %g3
+
+ /* 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
+ 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
+
+ /* Call sparc32_start_kernel(struct linux_romvec *rp) */
+ sethi %hi(prom_vector_p), %g5
+ ld [%g5 + %lo(prom_vector_p)], %o0
+ call sparc32_start_kernel
+ nop
+
+ /* We should not get here. */
+ call halt_me
+ 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 sparc64 kernel\n\rand not a sparc32 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
Code Review / kvmfornfv.git / blobdiff