diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig | 4 | ||||
| -rw-r--r-- | lib/fdtdec.c | 225 | ||||
| -rw-r--r-- | lib/fdtdec_test.c | 216 | ||||
| -rw-r--r-- | lib/libfdt/fdt_ro.c | 31 | ||||
| -rw-r--r-- | lib/vsprintf.c | 2 |
5 files changed, 436 insertions, 42 deletions
diff --git a/lib/Kconfig b/lib/Kconfig index 8fe5d85a05..2120216593 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -436,4 +436,8 @@ source lib/efi/Kconfig source lib/efi_loader/Kconfig source lib/optee/Kconfig +config TEST_FDTDEC + bool "enable fdtdec test" + depends on OF_LIBFDT + endmenu diff --git a/lib/fdtdec.c b/lib/fdtdec.c index a51dc5e986..efec3c2717 100644 --- a/lib/fdtdec.c +++ b/lib/fdtdec.c @@ -1261,6 +1261,231 @@ __weak void *board_fdt_blob_setup(void) } #endif +int fdtdec_set_phandle(void *blob, int node, uint32_t phandle) +{ + fdt32_t value = cpu_to_fdt32(phandle); + + return fdt_setprop(blob, node, "phandle", &value, sizeof(value)); +} + +static int fdtdec_init_reserved_memory(void *blob) +{ + int na, ns, node, err; + fdt32_t value; + + /* inherit #address-cells and #size-cells from the root node */ + na = fdt_address_cells(blob, 0); + ns = fdt_size_cells(blob, 0); + + node = fdt_add_subnode(blob, 0, "reserved-memory"); + if (node < 0) + return node; + + err = fdt_setprop(blob, node, "ranges", NULL, 0); + if (err < 0) + return err; + + value = cpu_to_fdt32(ns); + + err = fdt_setprop(blob, node, "#size-cells", &value, sizeof(value)); + if (err < 0) + return err; + + value = cpu_to_fdt32(na); + + err = fdt_setprop(blob, node, "#address-cells", &value, sizeof(value)); + if (err < 0) + return err; + + return node; +} + +int fdtdec_add_reserved_memory(void *blob, const char *basename, + const struct fdt_memory *carveout, + uint32_t *phandlep) +{ + fdt32_t cells[4] = {}, *ptr = cells; + uint32_t upper, lower, phandle; + int parent, node, na, ns, err; + char name[64]; + + /* create an empty /reserved-memory node if one doesn't exist */ + parent = fdt_path_offset(blob, "/reserved-memory"); + if (parent < 0) { + parent = fdtdec_init_reserved_memory(blob); + if (parent < 0) + return parent; + } + + /* only 1 or 2 #address-cells and #size-cells are supported */ + na = fdt_address_cells(blob, parent); + if (na < 1 || na > 2) + return -FDT_ERR_BADNCELLS; + + ns = fdt_size_cells(blob, parent); + if (ns < 1 || ns > 2) + return -FDT_ERR_BADNCELLS; + + /* find a matching node and return the phandle to that */ + fdt_for_each_subnode(node, blob, parent) { + const char *name = fdt_get_name(blob, node, NULL); + phys_addr_t addr, size; + + addr = fdtdec_get_addr_size(blob, node, "reg", &size); + if (addr == FDT_ADDR_T_NONE) { + debug("failed to read address/size for %s\n", name); + continue; + } + + if (addr == carveout->start && (addr + size) == carveout->end) { + *phandlep = fdt_get_phandle(blob, node); + return 0; + } + } + + /* + * Unpack the start address and generate the name of the new node + * base on the basename and the unit-address. + */ + lower = fdt_addr_unpack(carveout->start, &upper); + + if (na > 1 && upper > 0) + snprintf(name, sizeof(name), "%s@%x,%x", basename, upper, + lower); + else { + if (upper > 0) { + debug("address %08x:%08x exceeds addressable space\n", + upper, lower); + return -FDT_ERR_BADVALUE; + } + + snprintf(name, sizeof(name), "%s@%x", basename, lower); + } + + node = fdt_add_subnode(blob, parent, name); + if (node < 0) + return node; + + err = fdt_generate_phandle(blob, &phandle); + if (err < 0) + return err; + + err = fdtdec_set_phandle(blob, node, phandle); + if (err < 0) + return err; + + /* store one or two address cells */ + if (na > 1) + *ptr++ = cpu_to_fdt32(upper); + + *ptr++ = cpu_to_fdt32(lower); + + /* store one or two size cells */ + lower = fdt_size_unpack(carveout->end - carveout->start + 1, &upper); + + if (ns > 1) + *ptr++ = cpu_to_fdt32(upper); + + *ptr++ = cpu_to_fdt32(lower); + + err = fdt_setprop(blob, node, "reg", cells, (na + ns) * sizeof(*cells)); + if (err < 0) + return err; + + /* return the phandle for the new node for the caller to use */ + if (phandlep) + *phandlep = phandle; + + return 0; +} + +int fdtdec_get_carveout(const void *blob, const char *node, const char *name, + unsigned int index, struct fdt_memory *carveout) +{ + const fdt32_t *prop; + uint32_t phandle; + int offset, len; + fdt_size_t size; + + offset = fdt_path_offset(blob, node); + if (offset < 0) + return offset; + + prop = fdt_getprop(blob, offset, name, &len); + if (!prop) { + debug("failed to get %s for %s\n", name, node); + return -FDT_ERR_NOTFOUND; + } + + if ((len % sizeof(phandle)) != 0) { + debug("invalid phandle property\n"); + return -FDT_ERR_BADPHANDLE; + } + + if (len < (sizeof(phandle) * (index + 1))) { + debug("invalid phandle index\n"); + return -FDT_ERR_BADPHANDLE; + } + + phandle = fdt32_to_cpu(prop[index]); + + offset = fdt_node_offset_by_phandle(blob, phandle); + if (offset < 0) { + debug("failed to find node for phandle %u\n", phandle); + return offset; + } + + carveout->start = fdtdec_get_addr_size_auto_noparent(blob, offset, + "reg", 0, &size, + true); + if (carveout->start == FDT_ADDR_T_NONE) { + debug("failed to read address/size from \"reg\" property\n"); + return -FDT_ERR_NOTFOUND; + } + + carveout->end = carveout->start + size - 1; + + return 0; +} + +int fdtdec_set_carveout(void *blob, const char *node, const char *prop_name, + unsigned int index, const char *name, + const struct fdt_memory *carveout) +{ + uint32_t phandle; + int err, offset; + fdt32_t value; + + /* XXX implement support for multiple phandles */ + if (index > 0) { + debug("invalid index %u\n", index); + return -FDT_ERR_BADOFFSET; + } + + err = fdtdec_add_reserved_memory(blob, name, carveout, &phandle); + if (err < 0) { + debug("failed to add reserved memory: %d\n", err); + return err; + } + + offset = fdt_path_offset(blob, node); + if (offset < 0) { + debug("failed to find offset for node %s: %d\n", node, offset); + return offset; + } + + value = cpu_to_fdt32(phandle); + + err = fdt_setprop(blob, offset, prop_name, &value, sizeof(value)); + if (err < 0) { + debug("failed to set %s property for node %s: %d\n", prop_name, + node, err); + return err; + } + + return 0; +} + int fdtdec_setup(void) { #if CONFIG_IS_ENABLED(OF_CONTROL) diff --git a/lib/fdtdec_test.c b/lib/fdtdec_test.c index a82e27de94..f6defe16c5 100644 --- a/lib/fdtdec_test.c +++ b/lib/fdtdec_test.c @@ -15,48 +15,28 @@ /* The size of our test fdt blob */ #define FDT_SIZE (16 * 1024) -/** - * Check if an operation failed, and if so, print an error - * - * @param oper_name Name of operation - * @param err Error code to check - * - * @return 0 if ok, -1 if there was an error - */ -static int fdt_checkerr(const char *oper_name, int err) -{ - if (err) { - printf("%s: %s: %s\n", __func__, oper_name, fdt_strerror(err)); - return -1; - } +#define CHECK(op) ({ \ + int err = op; \ + if (err < 0) { \ + printf("%s: %s: %s\n", __func__, #op, \ + fdt_strerror(err)); \ + return err; \ + } \ + \ + err; \ + }) - return 0; -} +#define CHECKVAL(op, expected) ({ \ + int err = op; \ + if (err != expected) { \ + printf("%s: %s: expected %d, but returned %d\n",\ + __func__, #op, expected, err); \ + return err; \ + } \ + \ + err; \ + }) -/** - * Check the result of an operation and if incorrect, print an error - * - * @param oper_name Name of operation - * @param expected Expected value - * @param value Actual value - * - * @return 0 if ok, -1 if there was an error - */ -static int checkval(const char *oper_name, int expected, int value) -{ - if (expected != value) { - printf("%s: %s: expected %d, but returned %d\n", __func__, - oper_name, expected, value); - return -1; - } - - return 0; -} - -#define CHECK(op) if (fdt_checkerr(#op, op)) return -1 -#define CHECKVAL(op, expected) \ - if (checkval(#op, expected, op)) \ - return -1 #define CHECKOK(op) CHECKVAL(op, 0) /* maximum number of nodes / aliases to generate */ @@ -79,7 +59,9 @@ static int make_fdt(void *fdt, int size, const char *aliases, { char name[20], value[20]; const char *s; +#if defined(DEBUG) && defined(CONFIG_SANDBOX) int fd; +#endif CHECK(fdt_create(fdt, size)); CHECK(fdt_finish_reservemap(fdt)); @@ -136,7 +118,7 @@ static int run_test(const char *aliases, const char *nodes, const char *expect) CHECKVAL(make_fdt(blob, FDT_SIZE, aliases, nodes), 0); CHECKVAL(fdtdec_find_aliases_for_id(blob, "i2c", COMPAT_UNKNOWN, - list, ARRAY_SIZE(list)), strlen(expect)); + list, ARRAY_SIZE(list)), (int)strlen(expect)); /* Check we got the right ones */ for (i = 0, s = expect; *s; s++, i++) { @@ -159,6 +141,156 @@ static int run_test(const char *aliases, const char *nodes, const char *expect) return 0; } +static int make_fdt_carveout_device(void *fdt, uint32_t na, uint32_t ns) +{ + const char *basename = "/display"; + struct fdt_memory carveout = { +#ifdef CONFIG_PHYS_64BIT + .start = 0x180000000, + .end = 0x18fffffff, +#else + .start = 0x80000000, + .end = 0x8fffffff, +#endif + }; + fdt32_t cells[4], *ptr = cells; + uint32_t upper, lower; + char name[32]; + int offset; + + /* store one or two address cells */ + lower = fdt_addr_unpack(carveout.start, &upper); + + if (na > 1 && upper > 0) + snprintf(name, sizeof(name), "%s@%x,%x", basename, upper, + lower); + else + snprintf(name, sizeof(name), "%s@%x", basename, lower); + + if (na > 1) + *ptr++ = cpu_to_fdt32(upper); + + *ptr++ = cpu_to_fdt32(lower); + + /* store one or two size cells */ + lower = fdt_size_unpack(carveout.end - carveout.start + 1, &upper); + + if (ns > 1) + *ptr++ = cpu_to_fdt32(upper); + + *ptr++ = cpu_to_fdt32(lower); + + offset = CHECK(fdt_add_subnode(fdt, 0, name + 1)); + CHECK(fdt_setprop(fdt, offset, "reg", cells, (na + ns) * sizeof(*cells))); + + return fdtdec_set_carveout(fdt, name, "memory-region", 0, + "framebuffer", &carveout); +} + +static int check_fdt_carveout(void *fdt, uint32_t address_cells, + uint32_t size_cells) +{ +#ifdef CONFIG_PHYS_64BIT + const char *name = "/display@1,80000000"; + const struct fdt_memory expected = { + .start = 0x180000000, + .end = 0x18fffffff, + }; +#else + const char *name = "/display@80000000"; + const struct fdt_memory expected = { + .start = 0x80000000, + .end = 0x8fffffff, + }; +#endif + struct fdt_memory carveout; + + printf("carveout: %pap-%pap na=%u ns=%u: ", &expected.start, + &expected.end, address_cells, size_cells); + + CHECK(fdtdec_get_carveout(fdt, name, "memory-region", 0, &carveout)); + + if ((carveout.start != expected.start) || + (carveout.end != expected.end)) { + printf("carveout: %pap-%pap, expected %pap-%pap\n", + &carveout.start, &carveout.end, + &expected.start, &expected.end); + return 1; + } + + printf("pass\n"); + return 0; +} + +static int make_fdt_carveout(void *fdt, int size, uint32_t address_cells, + uint32_t size_cells) +{ + fdt32_t na = cpu_to_fdt32(address_cells); + fdt32_t ns = cpu_to_fdt32(size_cells); +#if defined(DEBUG) && defined(CONFIG_SANDBOX) + char filename[512]; + int fd; +#endif + int err; + + CHECK(fdt_create(fdt, size)); + CHECK(fdt_finish_reservemap(fdt)); + CHECK(fdt_begin_node(fdt, "")); + CHECK(fdt_property(fdt, "#address-cells", &na, sizeof(na))); + CHECK(fdt_property(fdt, "#size-cells", &ns, sizeof(ns))); + CHECK(fdt_end_node(fdt)); + CHECK(fdt_finish(fdt)); + CHECK(fdt_pack(fdt)); + + CHECK(fdt_open_into(fdt, fdt, FDT_SIZE)); + + err = make_fdt_carveout_device(fdt, address_cells, size_cells); + +#if defined(DEBUG) && defined(CONFIG_SANDBOX) + snprintf(filename, sizeof(filename), "/tmp/fdtdec-carveout-%u-%u.dtb", + address_cells, size_cells); + + fd = os_open(filename, OS_O_CREAT | OS_O_WRONLY); + if (fd < 0) { + printf("could not open .dtb file to write\n"); + goto out; + } + + os_write(fd, fdt, size); + os_close(fd); + +out: +#endif + return err; +} + +static int check_carveout(void) +{ + void *fdt; + + fdt = malloc(FDT_SIZE); + if (!fdt) { + printf("%s: out of memory\n", __func__); + return 1; + } + +#ifndef CONFIG_PHYS_64BIT + CHECKVAL(make_fdt_carveout(fdt, FDT_SIZE, 1, 1), 0); + CHECKOK(check_fdt_carveout(fdt, 1, 1)); + CHECKVAL(make_fdt_carveout(fdt, FDT_SIZE, 1, 2), 0); + CHECKOK(check_fdt_carveout(fdt, 1, 2)); +#else + CHECKVAL(make_fdt_carveout(fdt, FDT_SIZE, 1, 1), -FDT_ERR_BADVALUE); + CHECKVAL(make_fdt_carveout(fdt, FDT_SIZE, 1, 2), -FDT_ERR_BADVALUE); +#endif + CHECKVAL(make_fdt_carveout(fdt, FDT_SIZE, 2, 1), 0); + CHECKOK(check_fdt_carveout(fdt, 2, 1)); + CHECKVAL(make_fdt_carveout(fdt, FDT_SIZE, 2, 2), 0); + CHECKOK(check_fdt_carveout(fdt, 2, 2)); + + return 0; +} + static int do_test_fdtdec(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { @@ -200,6 +332,8 @@ static int do_test_fdtdec(cmd_tbl_t *cmdtp, int flag, int argc, CHECKOK(run_test("2a 1a 0a", "a", " a")); CHECKOK(run_test("0a 1a 2a", "a", "a")); + CHECKOK(check_carveout()); + printf("Test passed\n"); return 0; } diff --git a/lib/libfdt/fdt_ro.c b/lib/libfdt/fdt_ro.c index b6ca4e0b0c..693de9aa5a 100644 --- a/lib/libfdt/fdt_ro.c +++ b/lib/libfdt/fdt_ro.c @@ -73,6 +73,37 @@ uint32_t fdt_get_max_phandle(const void *fdt) return 0; } +int fdt_generate_phandle(const void *fdt, uint32_t *phandle) +{ + uint32_t max = 0; + int offset = -1; + + while (true) { + uint32_t value; + + offset = fdt_next_node(fdt, offset, NULL); + if (offset < 0) { + if (offset == -FDT_ERR_NOTFOUND) + break; + + return offset; + } + + value = fdt_get_phandle(fdt, offset); + + if (value > max) + max = value; + } + + if (max == FDT_MAX_PHANDLE) + return -FDT_ERR_NOPHANDLES; + + if (phandle) + *phandle = max + 1; + + return 0; +} + int fdt_get_mem_rsv(const void *fdt, int n, uint64_t *address, uint64_t *size) { FDT_CHECK_HEADER(fdt); diff --git a/lib/vsprintf.c b/lib/vsprintf.c index 1b6c154d8d..2403825dc9 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -457,7 +457,6 @@ static char *pointer(const char *fmt, char *buf, char *end, void *ptr, return device_path_string(buf, end, ptr, field_width, precision, flags); #endif -#ifdef CONFIG_CMD_NET case 'a': flags |= SPECIAL | ZEROPAD; @@ -469,6 +468,7 @@ static char *pointer(const char *fmt, char *buf, char *end, void *ptr, break; } break; +#ifdef CONFIG_CMD_NET case 'm': flags |= SPECIAL; /* Fallthrough */ |