New patch to review for filo: linux_load: set init_size boot parameter

[Mathias Krause]

Mathias Krause ([e-mail]) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/17927

-gerrit

commit c7670c29fc6ca0ca7c838f2ced4cc936cfb9821d
Author: Mathias Krause 
Date:   Tue Dec 20 10:28:26 2016 +0100

linux_load: set init_size boot parameter

Recent Linux kernels (v4.7+) require the boot loader to copy over the
    init_size boot parameter, too. We also miss to copy the loadflags.

Fix that to comply to the boot protocol v2.10+.

This fixes booting kernels v4.7 and later.

Change-Id: Ie68d44caedc481c368c63420376caedbdb9a93b5
    Signed-off-by: Mathias Krause 
---
 x86/linux_load.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/x86/linux_load.c b/x86/linux_load.c
index 7bb37dd..acbb830 100644
--- a/x86/linux_load.c
+++ b/x86/linux_load.c
@@ -182,7 +182,10 @@ struct linux_params {
    u32 initrd_addr_max;	/* 0x22c */
    u32 kernel_alignment;	/* 0x230 */
    u8 relocatable_kernel;	/* 0x234 */
-	u8 reserved13[155];		/* 0x22c */
+	u8 min_alignment;	/* 0x235 */
+	u8 reserved13[42];		/* 0x236 */
+	u32 init_size;		/* 0x260 */
+	u8 reserved14[108];		/* 0x264 */
    struct e820entry e820_map[E820MAX];	/* 0x2d0 */
    u8 reserved16[688];	/* 0x550 */
 #define COMMAND_LINE_SIZE 256
@@ -282,6 +285,7 @@ init_linux_params(struct linux_params *params, struct linux_header *hdr)
    /* Copy some useful values from header */
    params->mount_root_rdonly = hdr->root_flags;
    params->orig_root_dev = hdr->root_dev;
+	params->loader_flags = hdr->loadflags;

/* Video parameters.
     * This assumes we have VGA in standard 80x25 text mode,
@@ -812,6 +816,14 @@ int linux_load(const char *file, const char *cmdline)
    	free(initrd_file);
    }

+	/* set init_size */
+	if (hdr.protocol_version < 0x020a) {
+		/* conservative size assumption */
+		params->init_size = 3 * kern_size;
+	} else {
+		params->init_size = hdr.init_size;
+	}
+
    file_close();
 #if IS_ENABLED(CONFIG_LP_USB)
    usb_exit();