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authorRonald G. Minnich <rminnich@gmail.com>2014-11-26 19:25:47 +0000
committerRonald G. Minnich <rminnich@gmail.com>2014-12-01 19:06:43 +0100
commite0e784a456c4d64e5e88ce578371fe6c538db559 (patch)
tree7557a07ab68659eaf81ac50fc860a288055e0845 /src/arch/riscv/rom_media.c
parent796fe068d3c47f873b82c65cc0591f88f87b0a85 (diff)
downloadcoreboot-e0e784a456c4d64e5e88ce578371fe6c538db559.tar.xz
Add UCB RISCV support for architecture, soc, and emulation mainboard..
Works in the RISCV version of QEMU. Note that the lzmadecode is so unclean that it needs a lot of work. A cleanup is in progress. We decided in Prague to do this as one thing, because it forms a nice case study of the bare minimum you need to add to get a new architecture going in qemu. Change-Id: If5af15c3a70733d219973e0d032746f8ab027e4d Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Reviewed-on: http://review.coreboot.org/7584 Reviewed-by: Patrick Georgi <pgeorgi@google.com> Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/arch/riscv/rom_media.c')
-rw-r--r--src/arch/riscv/rom_media.c100
1 files changed, 100 insertions, 0 deletions
diff --git a/src/arch/riscv/rom_media.c b/src/arch/riscv/rom_media.c
new file mode 100644
index 0000000000..712b7c49d4
--- /dev/null
+++ b/src/arch/riscv/rom_media.c
@@ -0,0 +1,100 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013 The Chromium OS Authors. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; version 2 of
+ * the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+#include <cbfs.h>
+#include <string.h>
+
+#ifdef LIBPAYLOAD
+# define printk(x...)
+# define init_default_cbfs_media libpayload_init_default_cbfs_media
+ extern int libpayload_init_default_cbfs_media(struct cbfs_media *media);
+#else
+# include <console/console.h>
+#endif
+
+// Implementation of memory-mapped ROM media source on X86.
+
+static int rom_media_open(struct cbfs_media *media) {
+ return 0;
+}
+
+static void *rom_media_map(struct cbfs_media *media, size_t offset, size_t count) {
+ void *ptr;
+ printk(BIOS_INFO, "%s: media %p, offset %lx, size %ld.\n", __func__, media, offset, count);
+
+ ptr = (void*)offset;
+ return ptr;
+}
+
+static void *rom_media_unmap(struct cbfs_media *media, const void *address) {
+ return NULL;
+}
+
+static size_t rom_media_read(struct cbfs_media *media, void *dest, size_t offset,
+ size_t count) {
+ void *ptr = rom_media_map(media, offset, count);
+ memcpy(dest, ptr, count);
+ rom_media_unmap(media, ptr);
+ return count;
+}
+
+static int rom_media_close(struct cbfs_media *media) {
+ return 0;
+}
+
+static int init_rom_media_cbfs(struct cbfs_media *media) {
+ //extern unsigned long _cbfs_master_header;
+ // On X86, we always keep a reference of pointer to CBFS header in
+ // 0xfffffffc, and the pointer is still a memory-mapped address.
+ // Since the CBFS core always use ROM offset, we need to figure out
+ // header->romsize even before media is initialized.
+ struct cbfs_header *header = (struct cbfs_header*) CONFIG_CBFS_HEADER_ROM_OFFSET; //&_cbfs_master_header;
+ if (CBFS_HEADER_MAGIC != ntohl(header->magic)) {
+ printk(BIOS_ERR, "Invalid CBFS master header at %p\n", header);
+ printk(BIOS_ERR, "Expected %08lx and got %08lx\n", (unsigned long) CBFS_HEADER_MAGIC, (unsigned long) ntohl(header->magic));
+ return -1;
+ } else {
+ uint32_t romsize = ntohl(header->romsize);
+ media->context = (void*)(uintptr_t)romsize;
+#if defined(CONFIG_ROM_SIZE)
+ if (CONFIG_ROM_SIZE != romsize)
+ printk(BIOS_INFO, "Warning: rom size unmatch (%d/%d)\n",
+ CONFIG_ROM_SIZE, romsize);
+#endif
+ }
+ media->open = rom_media_open;
+ media->close = rom_media_close;
+ media->map = rom_media_map;
+ media->unmap = rom_media_unmap;
+ media->read = rom_media_read;
+ return 0;
+}
+
+int init_default_cbfs_media(struct cbfs_media *media) {
+ return init_rom_media_cbfs(media);
+}
+// bug in coreboot. Fix me.
+// even if you have no use for lzma cbfs demands it.
+// and the ulzma code is terrible -- full of bad 32/64 bad things.
+unsigned long ulzma(unsigned char *src, unsigned char *dst);
+unsigned long ulzma(unsigned char *src, unsigned char *dst)
+{
+ return 0;
+}