6c87e3d596
We rebase fw_cfg_init_mem() to the new function for compatibility with
current callers.
The behavior of the (big endian) multi-byte data reads is best shown
with a qtest session. Here, we are reading the first six bytes of
the UUID
$ arm-softmmu/qemu-system-arm -M virt -machine accel=qtest \
-qtest stdio -uuid 4600cb32-38ec-4b2f-8acb-81c6ea54f2d8
>>> writew 0x9020008 0x0200
<<< OK
>>> readl 0x9020000
<<< OK 0x000000004600cb32
Remember this is big endian. On big endian machines, it is stored
directly as 0x46 0x00 0xcb 0x32.
On a little endian machine, we have to first swap it, so that it becomes
0x32cb0046. When written to memory, it becomes 0x46 0x00 0xcb 0x32
again.
Reading byte-by-byte works too, of course:
>>> readb 0x9020000
<<< OK 0x0000000000000038
>>> readb 0x9020000
<<< OK 0x00000000000000ec
Here only a single byte is read at a time, so they are read in order
similar to the 1-byte data port that is already in PPC and SPARC
machines.
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1419250305-31062-8-git-send-email-pbonzini@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
91 lines
3.1 KiB
C
91 lines
3.1 KiB
C
#ifndef FW_CFG_H
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#define FW_CFG_H
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#ifndef NO_QEMU_PROTOS
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#include <stdint.h>
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#include <stddef.h>
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#include "exec/hwaddr.h"
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#include "qemu/typedefs.h"
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#endif
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#define FW_CFG_SIGNATURE 0x00
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#define FW_CFG_ID 0x01
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#define FW_CFG_UUID 0x02
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#define FW_CFG_RAM_SIZE 0x03
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#define FW_CFG_NOGRAPHIC 0x04
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#define FW_CFG_NB_CPUS 0x05
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#define FW_CFG_MACHINE_ID 0x06
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#define FW_CFG_KERNEL_ADDR 0x07
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#define FW_CFG_KERNEL_SIZE 0x08
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#define FW_CFG_KERNEL_CMDLINE 0x09
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#define FW_CFG_INITRD_ADDR 0x0a
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#define FW_CFG_INITRD_SIZE 0x0b
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#define FW_CFG_BOOT_DEVICE 0x0c
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#define FW_CFG_NUMA 0x0d
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#define FW_CFG_BOOT_MENU 0x0e
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#define FW_CFG_MAX_CPUS 0x0f
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#define FW_CFG_KERNEL_ENTRY 0x10
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#define FW_CFG_KERNEL_DATA 0x11
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#define FW_CFG_INITRD_DATA 0x12
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#define FW_CFG_CMDLINE_ADDR 0x13
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#define FW_CFG_CMDLINE_SIZE 0x14
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#define FW_CFG_CMDLINE_DATA 0x15
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#define FW_CFG_SETUP_ADDR 0x16
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#define FW_CFG_SETUP_SIZE 0x17
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#define FW_CFG_SETUP_DATA 0x18
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#define FW_CFG_FILE_DIR 0x19
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#define FW_CFG_FILE_FIRST 0x20
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#define FW_CFG_FILE_SLOTS 0x10
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#define FW_CFG_MAX_ENTRY (FW_CFG_FILE_FIRST+FW_CFG_FILE_SLOTS)
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#define FW_CFG_WRITE_CHANNEL 0x4000
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#define FW_CFG_ARCH_LOCAL 0x8000
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#define FW_CFG_ENTRY_MASK ~(FW_CFG_WRITE_CHANNEL | FW_CFG_ARCH_LOCAL)
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#define FW_CFG_INVALID 0xffff
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#define FW_CFG_MAX_FILE_PATH 56
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#ifndef NO_QEMU_PROTOS
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typedef struct FWCfgFile {
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uint32_t size; /* file size */
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uint16_t select; /* write this to 0x510 to read it */
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uint16_t reserved;
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char name[FW_CFG_MAX_FILE_PATH];
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} FWCfgFile;
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typedef struct FWCfgFiles {
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uint32_t count;
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FWCfgFile f[];
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} FWCfgFiles;
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typedef void (*FWCfgCallback)(void *opaque, uint8_t *data);
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typedef void (*FWCfgReadCallback)(void *opaque, uint32_t offset);
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void fw_cfg_add_bytes(FWCfgState *s, uint16_t key, void *data, size_t len);
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void fw_cfg_add_string(FWCfgState *s, uint16_t key, const char *value);
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void fw_cfg_add_i16(FWCfgState *s, uint16_t key, uint16_t value);
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void fw_cfg_add_i32(FWCfgState *s, uint16_t key, uint32_t value);
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void fw_cfg_add_i64(FWCfgState *s, uint16_t key, uint64_t value);
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void fw_cfg_add_callback(FWCfgState *s, uint16_t key, FWCfgCallback callback,
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void *callback_opaque, void *data, size_t len);
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void fw_cfg_add_file(FWCfgState *s, const char *filename, void *data,
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size_t len);
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void fw_cfg_add_file_callback(FWCfgState *s, const char *filename,
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FWCfgReadCallback callback, void *callback_opaque,
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void *data, size_t len);
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void *fw_cfg_modify_file(FWCfgState *s, const char *filename, void *data,
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size_t len);
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FWCfgState *fw_cfg_init_io(uint32_t iobase);
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FWCfgState *fw_cfg_init_mem(hwaddr ctl_addr, hwaddr data_addr);
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FWCfgState *fw_cfg_init_mem_wide(hwaddr ctl_addr, hwaddr data_addr,
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uint32_t data_width);
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FWCfgState *fw_cfg_find(void);
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#endif /* NO_QEMU_PROTOS */
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#endif
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