From f828bf25fe02f0d7148a9180988ab4d5681b8195 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Sat, 20 Apr 2013 08:42:41 +0000 Subject: [PATCH] sandbox: Add CONFIG_OF_HOSTFILE to read FDT from host file 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 --- arch/sandbox/cpu/start.c | 7 +++++ arch/sandbox/include/asm/state.h | 1 + common/board_f.c | 55 ++++++++++++++++++++++++++++++++++++++++ doc/README.fdt-control | 6 ++++- include/configs/sandbox.h | 2 ++ 5 files changed, 70 insertions(+), 1 deletion(-) diff --git a/arch/sandbox/cpu/start.c b/arch/sandbox/cpu/start.c index 5287fd5..2fcec8b 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/common/board_f.c b/common/board_f.c index 2045055..3a6638f 100644 --- a/common/board_f.c +++ b/common/board_f.c @@ -31,6 +31,7 @@ #include #include #include +#include #if defined(CONFIG_CMD_IDE) #include #endif @@ -305,6 +306,55 @@ __weak int arch_cpu_init(void) return 0; } +#ifdef CONFIG_OF_HOSTFILE + +#define CHECK(x) err = (x); if (err) goto failed; + +/* Create an empty device tree blob */ +static int make_empty_fdt(void *fdt) +{ + int err; + + CHECK(fdt_create(fdt, 256)); + CHECK(fdt_finish_reservemap(fdt)); + CHECK(fdt_begin_node(fdt, "")); + CHECK(fdt_end_node(fdt)); + CHECK(fdt_finish(fdt)); + + return 0; +failed: + printf("Unable to create empty FDT: %s\n", fdt_strerror(err)); + return -EACCES; +} + +static int read_fdt_from_file(void) +{ + struct sandbox_state *state = state_get_current(); + void *blob; + int size; + int err; + + blob = map_sysmem(CONFIG_SYS_FDT_LOAD_ADDR, 0); + if (!state->fdt_fname) { + err = make_empty_fdt(blob); + if (!err) + goto done; + return err; + } + err = fs_set_blk_dev("host", NULL, FS_TYPE_SANDBOX); + if (err) + return err; + size = fs_read(state->fdt_fname, CONFIG_SYS_FDT_LOAD_ADDR, 0, 0); + if (size < 0) + return -EIO; + +done: + gd->fdt_blob = blob; + + return 0; +} +#endif + #ifdef CONFIG_SANDBOX static int setup_ram_buf(void) { @@ -328,6 +378,11 @@ static int setup_fdt(void) # else gd->fdt_blob = (ulong *)&_end; # endif +#elif defined(CONFIG_OF_HOSTFILE) + if (read_fdt_from_file()) { + puts("Failed to read control FDT\n"); + return -1; + } #endif /* Allow the early environment to override the fdt address */ gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16, diff --git a/doc/README.fdt-control b/doc/README.fdt-control index 8352835..5963f78 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 is 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 da7cc9a..8efaded 100644 --- a/include/configs/sandbox.h +++ b/include/configs/sandbox.h @@ -26,6 +26,7 @@ #define CONFIG_SANDBOX_BITS_PER_LONG 64 #define CONFIG_OF_CONTROL +#define CONFIG_OF_HOSTFILE #define CONFIG_OF_LIBFDT #define CONFIG_LMB @@ -71,6 +72,7 @@ #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_BASE 0 -- 2.7.4