arch/ia64/hp/sim/boot/boot_head.S

   1 /*
   2  * Copyright (C) 1998-2003 Hewlett-Packard Co
   3  *      David Mosberger-Tang <davidm@hpl.hp.com>
   4  */
   5
   6 #include <asm/asmmacro.h>
   7 #include <asm/pal.h>
   8
   9         .bss
  10         .align 16
  11 stack_mem:
  12         .skip 16834
  13
  14         .text
  15
  16 /* This needs to be defined because lib/string.c:strlcat() calls it in case of error... */
  17 GLOBAL_ENTRY(printk)
  18         break 0
  19 END(printk)
  20
  21 GLOBAL_ENTRY(_start)
  22         .prologue
  23         .save rp, r0
  24         .body
  25         movl gp = __gp
  26         movl sp = stack_mem+16384-16
  27         bsw.1
  28         br.call.sptk.many rp=start_bootloader
  29 END(_start)
  30
  31 /*
  32  * Set a break point on this function so that symbols are available to set breakpoints in
  33  * the kernel being debugged.
  34  */
  35 GLOBAL_ENTRY(debug_break)
  36         br.ret.sptk.many b0
  37 END(debug_break)
  38
  39 GLOBAL_ENTRY(ssc)
  40         .regstk 5,0,0,0
  41         mov r15=in4
  42         break 0x80001
  43         br.ret.sptk.many b0
  44 END(ssc)
  45
  46 GLOBAL_ENTRY(jmp_to_kernel)
  47         .regstk 2,0,0,0
  48         mov r28=in0
  49         mov b7=in1
  50         br.sptk.few b7
  51 END(jmp_to_kernel)
  52
  53 /*
  54  * r28 contains the index of the PAL function
  55  * r29--31 the args
  56  * Return values in ret0--3 (r8--11)
  57  */
  58 GLOBAL_ENTRY(pal_emulator_static)
  59         mov r8=-1
  60         mov r9=256
  61         ;;
  62         cmp.gtu p6,p7=r9,r28            /* r28 <= 255? */
  63 (p6)    br.cond.sptk.few static
  64         ;;
  65         mov r9=512
  66         ;;
  67         cmp.gtu p6,p7=r9,r28
  68 (p6)    br.cond.sptk.few stacked
  69         ;;
  70 static: cmp.eq p6,p7=PAL_PTCE_INFO,r28
  71 (p7)    br.cond.sptk.few 1f
  72         ;;
  73         mov r8=0                        /* status = 0 */
  74         movl r9=0x100000000             /* tc.base */
  75         movl r10=0x0000000200000003     /* count[0], count[1] */
  76         movl r11=0x1000000000002000     /* stride[0], stride[1] */
  77         br.cond.sptk.few rp
  78 1:      cmp.eq p6,p7=PAL_FREQ_RATIOS,r28
  79 (p7)    br.cond.sptk.few 1f
  80         mov r8=0                        /* status = 0 */
  81         movl r9 =0x100000064            /* proc_ratio (1/100) */
  82         movl r10=0x100000100            /* bus_ratio<<32 (1/256) */
  83         movl r11=0x100000064            /* itc_ratio<<32 (1/100) */
  84         ;;
  85 1:      cmp.eq p6,p7=PAL_RSE_INFO,r28
  86 (p7)    br.cond.sptk.few 1f
  87         mov r8=0                        /* status = 0 */
  88         mov r9=96                       /* num phys stacked */
  89         mov r10=0                       /* hints */
  90         mov r11=0
  91         br.cond.sptk.few rp
  92 1:      cmp.eq p6,p7=PAL_CACHE_FLUSH,r28                /* PAL_CACHE_FLUSH */
  93 (p7)    br.cond.sptk.few 1f
  94         mov r9=ar.lc
  95         movl r8=524288                  /* flush 512k million cache lines (16MB) */
  96         ;;
  97         mov ar.lc=r8
  98         movl r8=0xe000000000000000
  99         ;;
 100 .loop:  fc r8
 101         add r8=32,r8
 102         br.cloop.sptk.few .loop
 103         sync.i
 104         ;;
 105         srlz.i
 106         ;;
 107         mov ar.lc=r9
 108         mov r8=r0
 109         ;;
 110 1:      cmp.eq p6,p7=PAL_PERF_MON_INFO,r28
 111 (p7)    br.cond.sptk.few 1f
 112         mov r8=0                        /* status = 0 */
 113         movl r9 =0x08122f04             /* generic=4 width=47 retired=8 cycles=18 */
 114         mov r10=0                       /* reserved */
 115         mov r11=0                       /* reserved */
 116         mov r16=0xffff                  /* implemented PMC */
 117         mov r17=0x3ffff                 /* implemented PMD */
 118         add r18=8,r29                   /* second index */
 119         ;;
 120         st8 [r29]=r16,16                /* store implemented PMC */
 121         st8 [r18]=r0,16                 /* clear remaining bits  */
 122         ;;
 123         st8 [r29]=r0,16                 /* clear remaining bits  */
 124         st8 [r18]=r0,16                 /* clear remaining bits  */
 125         ;;
 126         st8 [r29]=r17,16                /* store implemented PMD */
 127         st8 [r18]=r0,16                 /* clear remaining bits  */
 128         mov r16=0xf0                    /* cycles count capable PMC */
 129         ;;
 130         st8 [r29]=r0,16                 /* clear remaining bits  */
 131         st8 [r18]=r0,16                 /* clear remaining bits  */
 132         mov r17=0xf0                    /* retired bundles capable PMC */
 133         ;;
 134         st8 [r29]=r16,16                /* store cycles capable */
 135         st8 [r18]=r0,16                 /* clear remaining bits  */
 136         ;;
 137         st8 [r29]=r0,16                 /* clear remaining bits  */
 138         st8 [r18]=r0,16                 /* clear remaining bits  */
 139         ;;
 140         st8 [r29]=r17,16                /* store retired bundle capable */
 141         st8 [r18]=r0,16                 /* clear remaining bits  */
 142         ;;
 143         st8 [r29]=r0,16                 /* clear remaining bits  */
 144         st8 [r18]=r0,16                 /* clear remaining bits  */
 145         ;;
 146 1:      cmp.eq p6,p7=PAL_VM_SUMMARY,r28
 147 (p7)    br.cond.sptk.few 1f
 148         mov     r8=0                    /* status = 0  */
 149         movl    r9=0x2044040020F1865    /* num_tc_levels=2, num_unique_tcs=4 */
 150                                         /* max_itr_entry=64, max_dtr_entry=64 */
 151                                         /* hash_tag_id=2, max_pkr=15 */
 152                                         /* key_size=24, phys_add_size=50, vw=1 */
 153         movl    r10=0x183C              /* rid_size=24, impl_va_msb=60 */
 154         ;;
 155 1:      cmp.eq p6,p7=PAL_MEM_ATTRIB,r28
 156 (p7)    br.cond.sptk.few 1f
 157         mov     r8=0                    /* status = 0 */
 158         mov     r9=0x80|0x01            /* NatPage|WB */
 159         ;;
 160 1:      br.cond.sptk.few rp
 161 stacked:
 162         br.ret.sptk.few rp
 163 END(pal_emulator_static)