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