With sandbox it is tricky to add an FDT to the image at build time (or later) since we build an ELF file, not a plain binary, and the address space of the whole U-Boot is not accessible in the emulated memory map of sandbox.
Sandbox can read files directly from the host, though, so add an option to read an FDT from a host file on start-up.
Signed-off-by: Simon Glass sjg@chromium.org --- arch/sandbox/cpu/start.c | 7 ++++++ arch/sandbox/include/asm/state.h | 1 + arch/sandbox/lib/board.c | 42 ++++++++++++++++++++++++++++++++----- doc/README.fdt-control | 6 ++++- include/configs/sandbox.h | 2 + 5 files changed, 51 insertions(+), 7 deletions(-)
diff --git a/arch/sandbox/cpu/start.c b/arch/sandbox/cpu/start.c index 7603bf9..8589da2 100644 --- a/arch/sandbox/cpu/start.c +++ b/arch/sandbox/cpu/start.c @@ -104,6 +104,13 @@ static int sb_cmdline_cb_command(struct sandbox_state *state, const char *arg) } SB_CMDLINE_OPT_SHORT(command, 'c', 1, "Execute U-Boot command");
+static int sb_cmdline_cb_fdt(struct sandbox_state *state, const char *arg) +{ + state->fdt_fname = arg; + return 0; +} +SB_CMDLINE_OPT_SHORT(fdt, 'd', 1, "Specify U-Boot's control FDT"); + int main(int argc, char *argv[]) { struct sandbox_state *state; diff --git a/arch/sandbox/include/asm/state.h b/arch/sandbox/include/asm/state.h index 2b62b46..9552708 100644 --- a/arch/sandbox/include/asm/state.h +++ b/arch/sandbox/include/asm/state.h @@ -34,6 +34,7 @@ enum exit_type_id { /* The complete state of the test system */ struct sandbox_state { const char *cmd; /* Command to execute */ + const char *fdt_fname; /* Filename of FDT binary */ enum exit_type_id exit_type; /* How we exited U-Boot */ const char *parse_err; /* Error to report from parsing */ int argc; /* Program arguments */ diff --git a/arch/sandbox/lib/board.c b/arch/sandbox/lib/board.c index 83858c1..0e4df4c 100644 --- a/arch/sandbox/lib/board.c +++ b/arch/sandbox/lib/board.c @@ -39,13 +39,15 @@
#include <common.h> #include <command.h> +#include <fs.h> +#include <fdtdec.h> #include <malloc.h> +#include <os.h> #include <stdio_dev.h> #include <timestamp.h> #include <version.h> #include <serial.h> - -#include <os.h> +#include <asm/state.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -89,6 +91,21 @@ static int display_dram_config(void) return 0; }
+static int read_fdt_from_file(void) +{ + struct sandbox_state *state = state_get_current(); + int size; + + if (fs_set_blk_dev("host", NULL, FS_TYPE_SANDBOX)) + return 1; + size = fs_read(state->fdt_fname, CONFIG_SYS_FDT_LOAD_ADDR, 0, 0); + if (size < 0) + return 1; + gd->fdt_blob = map_sysmem(CONFIG_SYS_FDT_LOAD_ADDR, size); + + return 0; +} + /* * Breathe some life into the board... * @@ -127,6 +144,9 @@ init_fnc_t *init_sequence[] = { #if defined(CONFIG_ARCH_CPU_INIT) arch_cpu_init, /* basic arch cpu dependent setup */ #endif +#ifdef CONFIG_OF_CONTROL + fdtdec_check_fdt, +#endif #if defined(CONFIG_BOARD_EARLY_INIT_F) board_early_init_f, #endif @@ -156,6 +176,10 @@ void board_init_f(ulong bootflag) assert(gd);
memset((void *)gd, 0, sizeof(gd_t)); + mem = os_malloc(CONFIG_SYS_SDRAM_SIZE); + + assert(mem); + gd->ram_buf = mem;
#if defined(CONFIG_OF_EMBED) /* Get a pointer to the FDT */ @@ -163,6 +187,8 @@ void board_init_f(ulong bootflag) #elif defined(CONFIG_OF_SEPARATE) /* FDT is at end of image */ gd->fdt_blob = (void *)(_end_ofs + _TEXT_BASE); +#elif defined(CONFIG_OF_HOSTFILE) + read_fdt_from_file(); #endif
for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) { @@ -170,11 +196,15 @@ void board_init_f(ulong bootflag) hang(); }
- size = CONFIG_SYS_SDRAM_SIZE; - mem = os_malloc(CONFIG_SYS_SDRAM_SIZE); +#ifdef CONFIG_OF_CONTROL + /* For now, put this check after the console is ready */ + if (fdtdec_prepare_fdt()) { + panic("** CONFIG_OF_CONTROL defined but no FDT - please see " + "doc/README.fdt-control"); + } +#endif
- assert(mem); - gd->ram_buf = mem; + size = CONFIG_SYS_SDRAM_SIZE; addr = (ulong)(mem + size);
/* diff --git a/doc/README.fdt-control b/doc/README.fdt-control index 85bda03..69c69de 100644 --- a/doc/README.fdt-control +++ b/doc/README.fdt-control @@ -142,7 +142,11 @@ join the two:
and then flash image.bin onto your board.
-You cannot use both of these options at the same time. +If CONFIG_OF_HOSTFILE os defined, then it will be read from a file on +startup. This is only useful for sandbox. Use the -d flag to U-Boot to +specify the file to read. + +You cannot use more than one of these options at the same time.
If you wish to put the fdt at a different address in memory, you can define the "fdtcontroladdr" environment variable. This is the hex diff --git a/include/configs/sandbox.h b/include/configs/sandbox.h index 67d788a..1c7bbe1 100644 --- a/include/configs/sandbox.h +++ b/include/configs/sandbox.h @@ -29,6 +29,7 @@ #define CONFIG_SANDBOX_BITS_PER_LONG 64
#define CONFIG_OF_CONTROL +#define CONFIG_OF_HOSTFILE #define CONFIG_OF_LIBFDT #define CONFIG_LMB #define CONFIG_FIT @@ -76,6 +77,7 @@ #define CONFIG_SYS_MEMTEST_START 0x00100000 #define CONFIG_SYS_MEMTEST_END (CONFIG_SYS_MEMTEST_START + 0x1000) #define CONFIG_PHYS_64BIT +#define CONFIG_SYS_FDT_LOAD_ADDR 0x1000000
/* Size of our emulated memory */ #define CONFIG_SYS_SDRAM_SIZE (128 << 20)