fdt: Expose the model, compatible and freebsd dts brandind as sysctl
This make it easier for script to get the hardware on which they are running. MFC after: 1 month Sponsored by: Diablotin Systems Differential Revision: https://reviews.freebsd.org/D31205 Reviewed by: imp Should be ok on powerpc: jhibbits (over irc)
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@ -105,7 +105,14 @@ static ofw_def_t ofw_fdt = {
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};
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OFW_DEF(ofw_fdt);
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#define FDT_FBSDVER_LEN 16
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#define FDT_MODEL_LEN 80
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#define FDT_COMPAT_LEN 255
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static void *fdtp = NULL;
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static char fdt_model[FDT_MODEL_LEN];
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static char fdt_compatible[FDT_COMPAT_LEN];
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static char fdt_fbsd_version[FDT_FBSDVER_LEN];
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static int
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sysctl_handle_dtb(SYSCTL_HANDLER_ARGS)
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@ -125,19 +132,50 @@ sysctl_register_fdt_oid(void *arg)
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SYSCTL_ADD_PROC(NULL, SYSCTL_STATIC_CHILDREN(_hw_fdt), OID_AUTO, "dtb",
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CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
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sysctl_handle_dtb, "", "Device Tree Blob");
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if (fdt_model[0] != '\0')
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SYSCTL_ADD_STRING(NULL, SYSCTL_STATIC_CHILDREN(_hw_fdt),
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OID_AUTO, "model", CTLFLAG_RD, fdt_model,
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FDT_MODEL_LEN, "System board model");
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if (fdt_compatible[0] != '\0')
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SYSCTL_ADD_STRING(NULL, SYSCTL_STATIC_CHILDREN(_hw_fdt),
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OID_AUTO, "compatible", CTLFLAG_RD, fdt_compatible,
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FDT_COMPAT_LEN, "Compatible platforms");
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if (fdt_fbsd_version[0] != '\0')
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SYSCTL_ADD_STRING(NULL, SYSCTL_STATIC_CHILDREN(_hw_fdt),
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OID_AUTO, "freebsd-version", CTLFLAG_RD, fdt_fbsd_version,
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FDT_FBSDVER_LEN, "FreeBSD DTS branding version");
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}
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SYSINIT(dtb_oid, SI_SUB_KMEM, SI_ORDER_ANY, sysctl_register_fdt_oid, NULL);
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static int
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ofw_fdt_init(ofw_t ofw, void *data)
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{
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phandle_t root;
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ssize_t len;
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int err;
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int i;
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/* Check FDT blob integrity */
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if ((err = fdt_check_header(data)) != 0)
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return (err);
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fdtp = data;
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root = ofw_fdt_finddevice(NULL, "/");
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len = ofw_fdt_getproplen(NULL, root, "model");
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bzero(fdt_model, FDT_MODEL_LEN);
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ofw_fdt_getprop(NULL, root, "model", fdt_model, FDT_MODEL_LEN);
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len = ofw_fdt_getproplen(NULL, root, "compatible");
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bzero(fdt_compatible, FDT_COMPAT_LEN);
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ofw_fdt_getprop(NULL, root, "compatible", fdt_compatible, FDT_COMPAT_LEN);
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/* Replace the middle '\0' with ' ' */
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for (i = 0; i < len - 1; i++)
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if (fdt_compatible[i] == '\0')
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fdt_compatible[i] = ' ';
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if ((len = ofw_fdt_getproplen(NULL, root, "freebsd,dts-version")) > 0) {
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bzero(fdt_fbsd_version, FDT_FBSDVER_LEN);
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ofw_fdt_getprop(NULL, root, "freebsd,dts-version",
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fdt_fbsd_version, FDT_FBSDVER_LEN);
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}
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return (0);
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}
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@ -411,7 +449,6 @@ ofw_fdt_package_to_path(ofw_t ofw, phandle_t package, char *buf, size_t len)
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static int
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ofw_fdt_fixup(ofw_t ofw)
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{
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#define FDT_MODEL_LEN 80
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char model[FDT_MODEL_LEN];
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phandle_t root;
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ssize_t len;
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