New patch to review for coreboot: ifdtool: Add option to specify platform (-p) quirks

[Andrey Petrov]

Andrey Petrov ([e-mail]) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/17202

-gerrit

commit a0644c8679fa66af06d3fb84c86467d88e01223d
Author: Andrey Petrov <[e-mail]>
Date:   Mon Oct 31 19:31:54 2016 -0700

    ifdtool: Add option to specify platform (-p) quirks
    
    Apollo Lake uses yet another descriptor format where only two masters
    are used: CPU/BIOS and CSE/TXE. CSE stores data in a region number 5
    that has not been used previously and CPU must not write it. Add quirk
    (-p aplk) that locks descriptor according to recommended values.
    
    BUG=chrome-os-partner:58974
    TEST=ifdtool -p aplk -l bios.bin; ifdtool -d bios.bin.new. Make sure
    FLMSTR1 and FLMSTR2 are set correctly. unlock with -l and make sure
    FLMSTRs are restored.
    
    Change-Id: I3f33372bef3ff75d0e34030694c79cd07d5540de
    Signed-off-by: Andrey Petrov <[e-mail]>
---
 util/ifdtool/ifdtool.c | 51 +++++++++++++++++++++++++++++++++++++-------------
 util/ifdtool/ifdtool.h |  4 ++++
 2 files changed, 42 insertions(+), 13 deletions(-)

diff --git a/util/ifdtool/ifdtool.c b/util/ifdtool/ifdtool.c
index 74588e1..6f160d1 100644
--- a/util/ifdtool/ifdtool.c
+++ b/util/ifdtool/ifdtool.c
@@ -30,6 +30,7 @@
 static int ifd_version;
 static int max_regions = 0;
 static int selected_chip = 0;
+static int platform = -1;
 
 static const struct region_name region_names[MAX_REGIONS] = {
 	{ "Flash Descriptor", "fd" },
@@ -832,18 +833,31 @@ static void lock_descriptor(char *filename, char *image, int size)
 		fmba->flmstr3 = 0x118;
 	}
 
-	/* CPU/BIOS can read descriptor, BIOS, and GbE. */
-	fmba->flmstr1 |= 0xb << rd_shift;
-	/* CPU/BIOS can write BIOS and GbE. */
-	fmba->flmstr1 |= 0xa << wr_shift;
-	/* ME can read descriptor, ME, and GbE. */
-	fmba->flmstr2 |= 0xd << rd_shift;
-	/* ME can write ME and GbE. */
-	fmba->flmstr2 |= 0xc << wr_shift;
-	/* GbE can write only GbE. */
-	fmba->flmstr3 |= 0x8 << rd_shift;
-	/* GbE can read only GbE. */
-	fmba->flmstr3 |= 0x8 << wr_shift;
+	switch (platform) {
+	case PLATFORM_APOLLOLAKE:
+		/* CPU/BIOS can read descriptor and BIOS */
+		fmba->flmstr1 |= 0x3 << rd_shift;
+		/* CPU/BIOS can write BIOS */
+		fmba->flmstr1 |= 0x2 << wr_shift;
+		/* TXE can read descriptor, BIOS, TXE and Device Expansion */
+		fmba->flmstr2 |= 0x27 << rd_shift;
+		/* TXE can write BIOS and Device Expansion */
+		fmba->flmstr2 |= 0x24 << wr_shift;
+		break;
+	default:
+		/* CPU/BIOS can read descriptor, BIOS, and GbE. */
+		fmba->flmstr1 |= 0xb << rd_shift;
+		/* CPU/BIOS can write BIOS and GbE. */
+		fmba->flmstr1 |= 0xa << wr_shift;
+		/* ME can read descriptor, ME, and GbE. */
+		fmba->flmstr2 |= 0xd << rd_shift;
+		/* ME can write ME and GbE. */
+		fmba->flmstr2 |= 0xc << wr_shift;
+		/* GbE can write only GbE. */
+		fmba->flmstr3 |= 0x8 << rd_shift;
+		/* GbE can read only GbE. */
+		fmba->flmstr3 |= 0x8 << wr_shift;
+	}
 
 	write_image(filename, image, size);
 }
@@ -1140,6 +1154,8 @@ static void print_usage(const char *name)
 	       "                                      Dual Output Fast Read Support\n"
 	       "   -l | --lock                        Lock firmware descriptor and ME region\n"
 	       "   -u | --unlock                      Unlock firmware descriptor and ME region\n"
+	       "   -p | --platform                    Add platform-specific quirks\n"
+	       "                                      aplk - Apollo Lake\n"
 	       "   -v | --version:                    print the version\n"
 	       "   -h | --help:                       print this help\n\n"
 	       "<region> is one of Descriptor, BIOS, ME, GbE, Platform\n"
@@ -1171,10 +1187,11 @@ int main(int argc, char *argv[])
 		{"unlock", 0, NULL, 'u'},
 		{"version", 0, NULL, 'v'},
 		{"help", 0, NULL, 'h'},
+		{"platform", 0, NULL, 'p'},
 		{0, 0, 0, 0}
 	};
 
-	while ((opt = getopt_long(argc, argv, "df:D:C:xi:n:s:eluvh?",
+	while ((opt = getopt_long(argc, argv, "df:D:C:xi:n:s:p:eluvh?",
 				  long_options, &option_index)) != EOF) {
 		switch (opt) {
 		case 'd':
@@ -1325,6 +1342,14 @@ int main(int argc, char *argv[])
 				exit(EXIT_FAILURE);
 			}
 			break;
+		case 'p':
+			if (!strcmp(optarg, "aplk")) {
+				platform = PLATFORM_APOLLOLAKE;
+			} else {
+				fprintf(stderr, "Unknown platform: %s\n", optarg);
+				exit(EXIT_FAILURE);
+			}
+			break;
 		case 'v':
 			print_version();
 			exit(EXIT_SUCCESS);
diff --git a/util/ifdtool/ifdtool.h b/util/ifdtool/ifdtool.h
index 7878712..fe98d6a 100644
--- a/util/ifdtool/ifdtool.h
+++ b/util/ifdtool/ifdtool.h
@@ -21,6 +21,10 @@ enum ifd_version {
 	IFD_VERSION_2,
 };
 
+enum platform {
+	PLATFORM_APOLLOLAKE
+};
+
 #define LAYOUT_LINELEN 80
 
 enum spi_frequency {