xemu/hw/m68k/bootinfo.h
Philippe Mathieu-Daudé f7795e4096 misc: Replace zero-length arrays with flexible array member (automatic)
Description copied from Linux kernel commit from Gustavo A. R. Silva
(see [3]):

--v-- description start --v--

  The current codebase makes use of the zero-length array language
  extension to the C90 standard, but the preferred mechanism to
  declare variable-length types such as these ones is a flexible
  array member [1], introduced in C99:

  struct foo {
      int stuff;
      struct boo array[];
  };

  By making use of the mechanism above, we will get a compiler
  warning in case the flexible array does not occur last in the
  structure, which will help us prevent some kind of undefined
  behavior bugs from being unadvertenly introduced [2] to the
  Linux codebase from now on.

--^-- description end --^--

Do the similar housekeeping in the QEMU codebase (which uses
C99 since commit 7be41675f7).

All these instances of code were found with the help of the
following Coccinelle script:

  @@
  identifier s, m, a;
  type t, T;
  @@
   struct s {
      ...
      t m;
  -   T a[0];
  +   T a[];
  };
  @@
  identifier s, m, a;
  type t, T;
  @@
   struct s {
      ...
      t m;
  -   T a[0];
  +   T a[];
   } QEMU_PACKED;

[1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
[2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=76497732932f
[3] https://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git/commit/?id=17642a2fbd2c1

Inspired-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-03-16 22:07:42 +01:00

115 lines
4.4 KiB
C

/*
* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
*
* Bootinfo tags from linux bootinfo.h and bootinfo-mac.h:
* This is an easily parsable and extendable structure containing all
* information to be passed from the bootstrap to the kernel
*
* This structure is copied right after the kernel by the bootstrap
* routine.
*/
#ifndef HW_M68K_BOOTINFO_H
#define HW_M68K_BOOTINFO_H
struct bi_record {
uint16_t tag; /* tag ID */
uint16_t size; /* size of record */
uint32_t data[]; /* data */
};
/* machine independent tags */
#define BI_LAST 0x0000 /* last record */
#define BI_MACHTYPE 0x0001 /* machine type (u_long) */
#define BI_CPUTYPE 0x0002 /* cpu type (u_long) */
#define BI_FPUTYPE 0x0003 /* fpu type (u_long) */
#define BI_MMUTYPE 0x0004 /* mmu type (u_long) */
#define BI_MEMCHUNK 0x0005 /* memory chunk address and size */
/* (struct mem_info) */
#define BI_RAMDISK 0x0006 /* ramdisk address and size */
/* (struct mem_info) */
#define BI_COMMAND_LINE 0x0007 /* kernel command line parameters */
/* (string) */
/* Macintosh-specific tags (all u_long) */
#define BI_MAC_MODEL 0x8000 /* Mac Gestalt ID (model type) */
#define BI_MAC_VADDR 0x8001 /* Mac video base address */
#define BI_MAC_VDEPTH 0x8002 /* Mac video depth */
#define BI_MAC_VROW 0x8003 /* Mac video rowbytes */
#define BI_MAC_VDIM 0x8004 /* Mac video dimensions */
#define BI_MAC_VLOGICAL 0x8005 /* Mac video logical base */
#define BI_MAC_SCCBASE 0x8006 /* Mac SCC base address */
#define BI_MAC_BTIME 0x8007 /* Mac boot time */
#define BI_MAC_GMTBIAS 0x8008 /* Mac GMT timezone offset */
#define BI_MAC_MEMSIZE 0x8009 /* Mac RAM size (sanity check) */
#define BI_MAC_CPUID 0x800a /* Mac CPU type (sanity check) */
#define BI_MAC_ROMBASE 0x800b /* Mac system ROM base address */
/* Macintosh hardware profile data */
#define BI_MAC_VIA1BASE 0x8010 /* Mac VIA1 base address (always present) */
#define BI_MAC_VIA2BASE 0x8011 /* Mac VIA2 base address (type varies) */
#define BI_MAC_VIA2TYPE 0x8012 /* Mac VIA2 type (VIA, RBV, OSS) */
#define BI_MAC_ADBTYPE 0x8013 /* Mac ADB interface type */
#define BI_MAC_ASCBASE 0x8014 /* Mac Apple Sound Chip base address */
#define BI_MAC_SCSI5380 0x8015 /* Mac NCR 5380 SCSI (base address, multi) */
#define BI_MAC_SCSIDMA 0x8016 /* Mac SCSI DMA (base address) */
#define BI_MAC_SCSI5396 0x8017 /* Mac NCR 53C96 SCSI (base address, multi) */
#define BI_MAC_IDETYPE 0x8018 /* Mac IDE interface type */
#define BI_MAC_IDEBASE 0x8019 /* Mac IDE interface base address */
#define BI_MAC_NUBUS 0x801a /* Mac Nubus type (none, regular, pseudo) */
#define BI_MAC_SLOTMASK 0x801b /* Mac Nubus slots present */
#define BI_MAC_SCCTYPE 0x801c /* Mac SCC serial type (normal, IOP) */
#define BI_MAC_ETHTYPE 0x801d /* Mac builtin ethernet type (Sonic, MACE */
#define BI_MAC_ETHBASE 0x801e /* Mac builtin ethernet base address */
#define BI_MAC_PMU 0x801f /* Mac power management / poweroff hardware */
#define BI_MAC_IOP_SWIM 0x8020 /* Mac SWIM floppy IOP */
#define BI_MAC_IOP_ADB 0x8021 /* Mac ADB IOP */
#define BOOTINFO0(as, base, id) \
do { \
stw_phys(as, base, id); \
base += 2; \
stw_phys(as, base, sizeof(struct bi_record)); \
base += 2; \
} while (0)
#define BOOTINFO1(as, base, id, value) \
do { \
stw_phys(as, base, id); \
base += 2; \
stw_phys(as, base, sizeof(struct bi_record) + 4); \
base += 2; \
stl_phys(as, base, value); \
base += 4; \
} while (0)
#define BOOTINFO2(as, base, id, value1, value2) \
do { \
stw_phys(as, base, id); \
base += 2; \
stw_phys(as, base, sizeof(struct bi_record) + 8); \
base += 2; \
stl_phys(as, base, value1); \
base += 4; \
stl_phys(as, base, value2); \
base += 4; \
} while (0)
#define BOOTINFOSTR(as, base, id, string) \
do { \
int i; \
stw_phys(as, base, id); \
base += 2; \
stw_phys(as, base, \
(sizeof(struct bi_record) + strlen(string) + 2) & ~1); \
base += 2; \
for (i = 0; string[i]; i++) { \
stb_phys(as, base++, string[i]); \
} \
stb_phys(as, base++, 0); \
base = (parameters_base + 1) & ~1; \
} while (0)
#endif