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 0:      nop 0             /* dummy nop to make unwinding work */
  30 END(_start)
  31
  32 /*
  33  * Set a break point on this function so that symbols are available to set breakpoints in
  34  * the kernel being debugged.
  35  */
  36 GLOBAL_ENTRY(debug_break)
  37         br.ret.sptk.many b0
  38 END(debug_break)
  39
  40 GLOBAL_ENTRY(ssc)
  41         .regstk 5,0,0,0
  42         mov r15=in4
  43         break 0x80001
  44         br.ret.sptk.many b0
  45 END(ssc)
  46
  47 GLOBAL_ENTRY(jmp_to_kernel)
  48         .regstk 2,0,0,0
  49         mov r28=in0
  50         mov b7=in1
  51         br.sptk.few b7
  52 END(jmp_to_kernel)
  53
  54 /*
  55  * r28 contains the index of the PAL function
  56  * r29--31 the args
  57  * Return values in ret0--3 (r8--11)
  58  */
  59 GLOBAL_ENTRY(pal_emulator_static)
  60         mov r8=-1
  61         mov r9=256
  62         ;;
  63         cmp.gtu p6,p7=r9,r28            /* r28 <= 255? */
  64 (p6)    br.cond.sptk.few static
  65         ;;
  66         mov r9=512
  67         ;;
  68         cmp.gtu p6,p7=r9,r28
  69 (p6)    br.cond.sptk.few stacked
  70         ;;
  71 static: cmp.eq p6,p7=PAL_PTCE_INFO,r28
  72 (p7)    br.cond.sptk.few 1f
  73         ;;
  74         mov r8=0                        /* status = 0 */
  75         movl r9=0x100000000             /* tc.base */
  76         movl r10=0x0000000200000003     /* count[0], count[1] */
  77         movl r11=0x1000000000002000     /* stride[0], stride[1] */
  78         br.cond.sptk.few rp
  79 1:      cmp.eq p6,p7=PAL_FREQ_RATIOS,r28
  80 (p7)    br.cond.sptk.few 1f
  81         mov r8=0                        /* status = 0 */
  82         movl r9 =0x100000064            /* proc_ratio (1/100) */
  83         movl r10=0x100000100            /* bus_ratio<<32 (1/256) */
  84         movl r11=0x100000064            /* itc_ratio<<32 (1/100) */
  85         ;;
  86 1:      cmp.eq p6,p7=PAL_RSE_INFO,r28
  87 (p7)    br.cond.sptk.few 1f
  88         mov r8=0                        /* status = 0 */
  89         mov r9=96                       /* num phys stacked */
  90         mov r10=0                       /* hints */
  91         mov r11=0
  92         br.cond.sptk.few rp
  93 1:      cmp.eq p6,p7=PAL_CACHE_FLUSH,r28                /* PAL_CACHE_FLUSH */
  94 (p7)    br.cond.sptk.few 1f
  95         mov r9=ar.lc
  96         movl r8=524288                  /* flush 512k million cache lines (16MB) */
  97         ;;
  98         mov ar.lc=r8
  99         movl r8=0xe000000000000000
 100         ;;
 101 .loop:  fc r8
 102         add r8=32,r8
 103         br.cloop.sptk.few .loop
 104         sync.i
 105         ;;
 106         srlz.i
 107         ;;
 108         mov ar.lc=r9
 109         mov r8=r0
 110         ;;
 111 1:      cmp.eq p6,p7=PAL_PERF_MON_INFO,r28
 112 (p7)    br.cond.sptk.few 1f
 113         mov r8=0                        /* status = 0 */
 114         movl r9 =0x08122f04             /* generic=4 width=47 retired=8 cycles=18 */
 115         mov r10=0                       /* reserved */
 116         mov r11=0                       /* reserved */
 117         mov r16=0xffff                  /* implemented PMC */
 118         mov r17=0x3ffff                 /* implemented PMD */
 119         add r18=8,r29                   /* second index */
 120         ;;
 121         st8 [r29]=r16,16                /* store implemented PMC */
 122         st8 [r18]=r0,16                 /* clear remaining bits  */
 123         ;;
 124         st8 [r29]=r0,16                 /* clear remaining bits  */
 125         st8 [r18]=r0,16                 /* clear remaining bits  */
 126         ;;
 127         st8 [r29]=r17,16                /* store implemented PMD */
 128         st8 [r18]=r0,16                 /* clear remaining bits  */
 129         mov r16=0xf0                    /* cycles count capable PMC */
 130         ;;
 131         st8 [r29]=r0,16                 /* clear remaining bits  */
 132         st8 [r18]=r0,16                 /* clear remaining bits  */
 133         mov r17=0xf0                    /* retired bundles capable PMC */
 134         ;;
 135         st8 [r29]=r16,16                /* store cycles 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         st8 [r29]=r17,16                /* store retired bundle capable */
 142         st8 [r18]=r0,16                 /* clear remaining bits  */
 143         ;;
 144         st8 [r29]=r0,16                 /* clear remaining bits  */
 145         st8 [r18]=r0,16                 /* clear remaining bits  */
 146         ;;
 147 1:      cmp.eq p6,p7=PAL_VM_SUMMARY,r28
 148 (p7)    br.cond.sptk.few 1f
 149         mov     r8=0                    /* status = 0  */
 150         movl    r9=0x2044040020F1865    /* num_tc_levels=2, num_unique_tcs=4 */
 151                                         /* max_itr_entry=64, max_dtr_entry=64 */
 152                                         /* hash_tag_id=2, max_pkr=15 */
 153                                         /* key_size=24, phys_add_size=50, vw=1 */
 154         movl    r10=0x183C              /* rid_size=24, impl_va_msb=60 */
 155         ;;
 156 1:      cmp.eq p6,p7=PAL_MEM_ATTRIB,r28
 157 (p7)    br.cond.sptk.few 1f
 158         mov     r8=0                    /* status = 0 */
 159         mov     r9=0x80|0x01            /* NatPage|WB */
 160         ;;
 161 1:      br.cond.sptk.few rp
 162 stacked:
 163         br.ret.sptk.few rp
 164 END(pal_emulator_static)