From c5dca50bbb07a0040197f9a6ccf5da3493736b5d Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Sun, 30 Jul 2023 11:16:52 -0600 Subject: [PATCH] bootstd: cros: Simplify setup and cmdline expressions Create a common base from which the other parts are offset and make all of the offsets related to that. This makes the code a little easier to read. Use X86_ prefixes for the two values which are x86-specific. Drop OFFSET_BASE since it is available in a header field. Drop the unnecessary 'start' variable too. Signed-off-by: Simon Glass --- boot/bootmeth_cros.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/boot/bootmeth_cros.c b/boot/bootmeth_cros.c index 2a745621e3..05284713f6 100644 --- a/boot/bootmeth_cros.c +++ b/boot/bootmeth_cros.c @@ -27,9 +27,9 @@ enum { PROBE_SIZE = SZ_4K, /* initial bytes read from partition */ - SETUP_OFFSET = 0x1000, /* bytes before base */ - CMDLINE_OFFSET = 0x2000, /* bytes before base */ - OFFSET_BASE = 0x100000, /* assumed kernel load-address */ + X86_SETUP_OFFSET = -0x1000, /* setup offset relative to base */ + CMDLINE_OFFSET = -0x2000, /* cmdline offset relative to base */ + X86_KERNEL_OFFSET = 0x4000, /* kernel offset relative to base */ }; static int cros_check(struct udevice *dev, struct bootflow_iter *iter) @@ -126,7 +126,7 @@ static int scan_part(struct udevice *blk, int partnum, static int cros_read_bootflow(struct udevice *dev, struct bootflow *bflow) { struct blk_desc *desc = dev_get_uclass_plat(bflow->blk); - ulong base, start, setup, cmdline, num_blks, kern_base; + ulong base, setup, cmdline, num_blks, kern_base; const struct vb2_kernel_preamble *preamble; ulong body_offset, body_size; struct disk_partition info; @@ -160,7 +160,6 @@ static int cros_read_bootflow(struct udevice *dev, struct bootflow *bflow) preamble->header_version_major, preamble->header_version_minor); - start = (ulong)preamble->bootloader_address; log_debug(" - load_address %lx, bl_addr %lx, bl_size %lx\n", (ulong)preamble->body_load_address, (ulong)preamble->bootloader_address, @@ -189,12 +188,13 @@ static int cros_read_bootflow(struct udevice *dev, struct bootflow *bflow) num_blks, buf); if (ret != num_blks) return log_msg_ret("inf", -EIO); - base = map_to_sysmem(buf); + base = map_to_sysmem(buf) + preamble->bootloader_address - + preamble->body_load_address; - setup = base + start - OFFSET_BASE - SETUP_OFFSET; - cmdline = base + start - OFFSET_BASE - CMDLINE_OFFSET; - kern_base = base + start - OFFSET_BASE + SZ_16K; - log_debug("base %lx setup %lx, cmdline %lx, kern_base %lx\n", base, + setup = base + X86_SETUP_OFFSET; + cmdline = base + CMDLINE_OFFSET; + kern_base = base + X86_KERNEL_OFFSET; + log_debug("base %lx setup %lx cmdline %lx kern_base %lx\n", base, setup, cmdline, kern_base); #ifdef CONFIG_X86 -- 2.39.5