[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 08/13] Xen: EFI: Parse DT parameters for Xen specific UEFI
From: Shannon Zhao <shannon.zhao@xxxxxxxxxx> Add a new function to parse DT parameters for Xen specific UEFI just like the way for normal UEFI. Then it could reuse the existing codes. Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx> --- drivers/firmware/efi/efi.c | 67 ++++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 62 insertions(+), 5 deletions(-) diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c index d6144e3..629bd06 100644 --- a/drivers/firmware/efi/efi.c +++ b/drivers/firmware/efi/efi.c @@ -24,6 +24,7 @@ #include <linux/of_fdt.h> #include <linux/io.h> #include <linux/platform_device.h> +#include <xen/xen.h> struct efi __read_mostly efi = { .mps = EFI_INVALID_TABLE_ADDR, @@ -488,12 +489,60 @@ static __initdata struct { UEFI_PARAM("MemMap Desc. Version", "linux,uefi-mmap-desc-ver", desc_ver) }; +static __initdata struct { + const char name[32]; + const char propname[32]; + int offset; + int size; +} xen_dt_params[] = { + UEFI_PARAM("System Table", "xen,uefi-system-table", system_table), + UEFI_PARAM("MemMap Address", "xen,uefi-mmap-start", mmap), + UEFI_PARAM("MemMap Size", "xen,uefi-mmap-size", mmap_size), + UEFI_PARAM("MemMap Desc. Size", "xen,uefi-mmap-desc-size", desc_size), + UEFI_PARAM("MemMap Desc. Version", "xen,uefi-mmap-desc-ver", desc_ver) +}; + struct param_info { int verbose; int found; void *params; }; +static int __init fdt_find_xen_uefi_params(unsigned long node, + const char *uname, int depth, + void *data) +{ + struct param_info *info = data; + const void *prop; + void *dest; + u64 val; + int i, len; + + if (xen_initial_domain() && (depth != 2 || strcmp(uname, "uefi") != 0)) + return 0; + + for (i = 0; i < ARRAY_SIZE(xen_dt_params); i++) { + prop = of_get_flat_dt_prop(node, xen_dt_params[i].propname, + &len); + if (!prop) + return 0; + dest = info->params + xen_dt_params[i].offset; + info->found++; + + val = of_read_number(prop, len / sizeof(u32)); + + if (dt_params[i].size == sizeof(u32)) + *(u32 *)dest = val; + else + *(u64 *)dest = val; + + if (info->verbose) + pr_info(" %s: 0x%0*llx\n", xen_dt_params[i].name, + xen_dt_params[i].size * 2, val); + } + + return 1; +} static int __init fdt_find_uefi_params(unsigned long node, const char *uname, int depth, void *data) { @@ -538,12 +587,20 @@ int __init efi_get_fdt_params(struct efi_fdt_params *params, int verbose) info.found = 0; info.params = params; - ret = of_scan_flat_dt(fdt_find_uefi_params, &info); - if (!info.found) + if (xen_initial_domain()) + ret = of_scan_flat_dt(fdt_find_xen_uefi_params, &info); + else + ret = of_scan_flat_dt(fdt_find_uefi_params, &info); + if (!info.found) { pr_info("UEFI not found.\n"); - else if (!ret) - pr_err("Can't find '%s' in device tree!\n", - dt_params[info.found].name); + } else if (!ret) { + if (xen_initial_domain()) + pr_err("Can't find '%s' in device tree!\n", + xen_dt_params[info.found].name); + else + pr_err("Can't find '%s' in device tree!\n", + xen_dt_params[info.found].name); + } return ret; } -- 2.1.0 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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