loader: pass args along to unix in C
There's no reason why we can't pass the args gotten from the bootloader to
unix in C.
Note: loader's _start sets the ATAG pointer to 0x100.  This change simply
propagates it to unix.

          --- old/usr/src/uts/armv6/loader/fakeloader.h
          +++ new/usr/src/uts/armv6/loader/fakeloader.h

   1    1  /*
   2    2   * This file and its contents are supplied under the terms of the
   3    3   * Common Development and Distribution License ("CDDL"), version 1.0.

   4    4   * You may only use this file in accordance with the terms of version
   5    5   * 1.0 of the CDDL.
   6    6   *
   7    7   * A full copy of the text of the CDDL should have accompanied this
   8    8   * source.  A copy of the CDDL is also available via the Internet at
   9    9   * http://www.illumos.org/license/CDDL.
  10   10   */
  11   11  
  12   12  /*
  13   13   * Copyright (c) 2013 Joyent, Inc.  All rights reserved.
       14 + * Copyright (c) 2015 Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
  14   15   */
  15   16  
  16   17  #ifndef _FAKELOADER_H
  17   18  #define _FAKELOADER_H
  18   19  
  19   20  /*
  20   21   * The hacky version of arm uniboot that is exactly for a few systems.
  21   22   */
  22   23  
  23   24  #include <sys/stdint.h>

  24   25  #include <sys/atag.h>
  25   26  
  26   27  #ifdef __cplusplus
  27   28  extern "C" {
  28   29  #endif
  29   30  
  30   31  typedef struct fakeloader_hdr {
  31   32          unsigned char fh_magic[4];      /* Magic! */
  32   33          uint32_t fh_unix_size;          /* How large is unix */
  33   34          uint32_t fh_unix_offset;        /* Offset from start to unix */
  34   35          uint32_t fh_archive_size;       /* How large is the archive */
  35   36          uint32_t fh_archive_offset;     /* Offset from start to archive */
  36   37  } fakeloader_hdr_t;
  37   38  
  38   39  #define FH_MAGIC0       'i'
  39   40  #define FH_MAGIC1       'f'
  40   41  #define FH_MAGIC2       'b'
  41   42  #define FH_MAGIC3       'h'
  42   43  
  43   44  /*
  44   45   * Backend operations, eg. what a given board must implement at the moment
  45   46   */

  46   47  extern void fakeload_backend_init(void);
  47   48  extern void fakeload_backend_putc(int);
  48   49  extern void fakeload_backend_addmaps(atag_header_t *);
  49   50  
  50   51  /*
  51   52   * ASM operations
  52   53   */
  53   54  extern void fakeload_unaligned_enable(void);
  54   55  extern void fakeload_mmu_enable(void);
  55   56  extern void fakeload_pt_setup(uintptr_t);
  56      -extern void fakeload_exec(uintptr_t);
       57 +extern void fakeload_exec(void *, void *, atag_header_t *, uintptr_t);
  57   58  
  58   59  extern void armv6_dcache_disable(void);
  59   60  extern void armv6_dcache_enable(void);
  60   61  extern void armv6_dcache_inval(void);
  61   62  extern void armv6_dcache_flush(void);
  62   63  
  63   64  extern void armv6_icache_disable(void);
  64   65  extern void armv6_icache_enable(void);
  65   66  extern void armv6_icache_inval(void);
  66   67  
  67   68  #ifdef __cplusplus
  68   69  }
  69   70  #endif
  70   71  
  71   72  #endif /* _FAKELOADER_H */
    

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