hw/m68k/bootinfo.h

   1 /*
   2  * SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
   3  *
   4  * Bootinfo tags from linux bootinfo.h and bootinfo-mac.h:
   5  * This is an easily parsable and extendable structure containing all
   6  * information to be passed from the bootstrap to the kernel
   7  *
   8  * This structure is copied right after the kernel by the bootstrap
   9  * routine.
  10  */
  11
  12 #ifndef HW_M68K_BOOTINFO_H
  13 #define HW_M68K_BOOTINFO_H
  14
  15 #define BOOTINFO0(base, id) \
  16     do { \
  17         stw_p(base, id); \
  18         base += 2; \
  19         stw_p(base, sizeof(struct bi_record)); \
  20         base += 2; \
  21     } while (0)
  22
  23 #define BOOTINFO1(base, id, value) \
  24     do { \
  25         stw_p(base, id); \
  26         base += 2; \
  27         stw_p(base, sizeof(struct bi_record) + 4); \
  28         base += 2; \
  29         stl_p(base, value); \
  30         base += 4; \
  31     } while (0)
  32
  33 #define BOOTINFO2(base, id, value1, value2) \
  34     do { \
  35         stw_p(base, id); \
  36         base += 2; \
  37         stw_p(base, sizeof(struct bi_record) + 8); \
  38         base += 2; \
  39         stl_p(base, value1); \
  40         base += 4; \
  41         stl_p(base, value2); \
  42         base += 4; \
  43     } while (0)
  44
  45 #define BOOTINFOSTR(base, id, string) \
  46     do { \
  47         stw_p(base, id); \
  48         base += 2; \
  49         stw_p(base, \
  50                  (sizeof(struct bi_record) + strlen(string) + \
  51                   1 /* null termination */ + 3 /* padding */) & ~3); \
  52         base += 2; \
  53         for (unsigned i_ = 0; string[i_]; i_++) { \
  54             stb_p(base++, string[i_]); \
  55         } \
  56         stb_p(base++, 0); \
  57         base = QEMU_ALIGN_PTR_UP(base, 4); \
  58     } while (0)
  59
  60 #define BOOTINFODATA(base, id, data, len) \
  61     do { \
  62         stw_p(base, id); \
  63         base += 2; \
  64         stw_p(base, \
  65                  (sizeof(struct bi_record) + len + \
  66                   2 /* length field */ + 3 /* padding */) & ~3); \
  67         base += 2; \
  68         stw_p(base, len); \
  69         base += 2; \
  70         for (unsigned i_ = 0; i_ < len; ++i_) { \
  71             stb_p(base++, data[i_]); \
  72         } \
  73         base = QEMU_ALIGN_PTR_UP(base, 4); \
  74     } while (0)
  75 #endif