From d96e7b898136ff88ee5c8fac9e0ae8a695e37d9b Mon Sep 17 00:00:00 2001 From: Julien Grall Date: Fri, 27 Sep 2013 17:56:37 +0100 Subject: xen/dts: Support Linux initrd DT bindings Linux uses the property linux,initrd-start and linux,initrd-end to know where the initrd lives in memory. Signed-off-by: Julien Grall Acked-by: Ian Campbell --- xen/common/device_tree.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'xen') diff --git a/xen/common/device_tree.c b/xen/common/device_tree.c index ea8ed56b9f..af0fb0446a 100644 --- a/xen/common/device_tree.c +++ b/xen/common/device_tree.c @@ -380,6 +380,29 @@ static void __init process_multiboot_node(const void *fdt, int node, early_info.modules.nr_mods = nr; } +static void __init process_chosen_node(const void *fdt, int node, + const char *name, + u32 address_cells, u32 size_cells) +{ + struct dt_mb_module *mod = &early_info.modules.module[MOD_INITRD]; + u32 start, end; + + dt_printk("Checking for initrd in /chosen\n"); + + start = device_tree_get_u32(fdt, node, "linux,initrd-start", 0); + end = device_tree_get_u32(fdt, node, "linux,initrd-end", 0); + + if ( !start || !end || (start >= end) ) + return; + + dt_printk("Initrd 0x%x-0x%x\n", start, end); + + mod->start = start; + mod->size = end - start; + + early_info.modules.nr_mods = MAX(MOD_INITRD, early_info.modules.nr_mods); +} + static int __init early_scan_node(const void *fdt, int node, const char *name, int depth, u32 address_cells, u32 size_cells, @@ -389,6 +412,8 @@ static int __init early_scan_node(const void *fdt, process_memory_node(fdt, node, name, address_cells, size_cells); else if ( device_tree_node_compatible(fdt, node, "xen,multiboot-module" ) ) process_multiboot_node(fdt, node, name, address_cells, size_cells); + else if ( depth == 1 && device_tree_node_matches(fdt, node, "chosen") ) + process_chosen_node(fdt, node, name, address_cells, size_cells); return 0; } -- cgit v1.2.3