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author | Eric Auger <eric.auger@linaro.org> | 2016-02-19 09:42:30 -0700 |
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committer | Timothy Pearson <tpearson@raptorengineering.com> | 2019-11-29 19:45:30 -0600 |
commit | c05a16860d17cbf495e7dda9b8683c61e2b493b2 (patch) | |
tree | c992568553a50672422cd3519c45b772e6d2cb14 | |
parent | d5b2c32e8d12f9e60dde39debcb4954a4f2350b1 (diff) | |
download | hqemu-c05a16860d17cbf495e7dda9b8683c61e2b493b2.zip hqemu-c05a16860d17cbf495e7dda9b8683c61e2b493b2.tar.gz |
device_tree: qemu_fdt_getprop_cell converted to use the error API
This patch aligns the prototype with qemu_fdt_getprop. The caller
can choose whether the function self-asserts on error (passing
&error_fatal as Error ** argument, corresponding to the legacy behavior),
or behaves differently such as simply output a message.
In this later case the caller can use the new lenp parameter to interpret
the error if any.
Signed-off-by: Eric Auger <eric.auger@linaro.org>
Reviewed-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
-rw-r--r-- | device_tree.c | 21 | ||||
-rw-r--r-- | hw/arm/boot.c | 6 | ||||
-rw-r--r-- | hw/arm/vexpress.c | 6 | ||||
-rw-r--r-- | include/sysemu/device_tree.h | 14 |
4 files changed, 35 insertions, 12 deletions
diff --git a/device_tree.c b/device_tree.c index 3d41c44..6204af8 100644 --- a/device_tree.c +++ b/device_tree.c @@ -350,15 +350,22 @@ const void *qemu_fdt_getprop(void *fdt, const char *node_path, } uint32_t qemu_fdt_getprop_cell(void *fdt, const char *node_path, - const char *property) + const char *property, int *lenp, Error **errp) { int len; - const uint32_t *p = qemu_fdt_getprop(fdt, node_path, property, &len, - &error_fatal); - if (len != 4) { - error_report("%s: %s/%s not 4 bytes long (not a cell?)", - __func__, node_path, property); - exit(1); + const uint32_t *p; + + if (!lenp) { + lenp = &len; + } + p = qemu_fdt_getprop(fdt, node_path, property, lenp, errp); + if (!p) { + return 0; + } else if (*lenp != 4) { + error_setg(errp, "%s: %s/%s not 4 bytes long (not a cell?)", + __func__, node_path, property); + *lenp = -EINVAL; + return 0; } return be32_to_cpu(*p); } diff --git a/hw/arm/boot.c b/hw/arm/boot.c index cce8c7c..0a56d34c 100644 --- a/hw/arm/boot.c +++ b/hw/arm/boot.c @@ -437,8 +437,10 @@ static int load_dtb(hwaddr addr, const struct arm_boot_info *binfo, return 0; } - acells = qemu_fdt_getprop_cell(fdt, "/", "#address-cells"); - scells = qemu_fdt_getprop_cell(fdt, "/", "#size-cells"); + acells = qemu_fdt_getprop_cell(fdt, "/", "#address-cells", + NULL, &error_fatal); + scells = qemu_fdt_getprop_cell(fdt, "/", "#size-cells", + NULL, &error_fatal); if (acells == 0 || scells == 0) { fprintf(stderr, "dtb file invalid (#address-cells or #size-cells 0)\n"); goto fail; diff --git a/hw/arm/vexpress.c b/hw/arm/vexpress.c index 3154aea..726c4e0 100644 --- a/hw/arm/vexpress.c +++ b/hw/arm/vexpress.c @@ -478,8 +478,10 @@ static void vexpress_modify_dtb(const struct arm_boot_info *info, void *fdt) uint32_t acells, scells, intc; const VEDBoardInfo *daughterboard = (const VEDBoardInfo *)info; - acells = qemu_fdt_getprop_cell(fdt, "/", "#address-cells"); - scells = qemu_fdt_getprop_cell(fdt, "/", "#size-cells"); + acells = qemu_fdt_getprop_cell(fdt, "/", "#address-cells", + NULL, &error_fatal); + scells = qemu_fdt_getprop_cell(fdt, "/", "#size-cells", + NULL, &error_fatal); intc = find_int_controller(fdt); if (!intc) { /* Not fatal, we just won't provide virtio. This will diff --git a/include/sysemu/device_tree.h b/include/sysemu/device_tree.h index 48bf3b5..705650a 100644 --- a/include/sysemu/device_tree.h +++ b/include/sysemu/device_tree.h @@ -67,8 +67,20 @@ int qemu_fdt_setprop_phandle(void *fdt, const char *node_path, const void *qemu_fdt_getprop(void *fdt, const char *node_path, const char *property, int *lenp, Error **errp); +/** + * qemu_fdt_getprop_cell: retrieve the value of a given 4 byte property + * @fdt: pointer to the device tree blob + * @node_path: node path + * @property: name of the property to find + * @lenp: fdt error if any or -EINVAL if the property size is different from + * 4 bytes, or 4 (expected length of the property) upon success. + * @errp: handle to an error object + * + * returns the property value on success + */ uint32_t qemu_fdt_getprop_cell(void *fdt, const char *node_path, - const char *property); + const char *property, int *lenp, + Error **errp); uint32_t qemu_fdt_get_phandle(void *fdt, const char *path); uint32_t qemu_fdt_alloc_phandle(void *fdt); int qemu_fdt_nop_node(void *fdt, const char *node_path); |