New patch to review for coreboot: ed57d88 ramstage: Add cbmem_get_table_location()

[Stefan Reinauer]

Stefan Reinauer ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/2797

-gerrit

commit ed57d885dfc5660fdf79c780b3d390c5ed9f2e75
Author: Aaron Durbin 
Date:   Tue Feb 12 00:40:30 2013 -0600

ramstage: Add cbmem_get_table_location()

When CONFIG_EARLY_CBMEM_INIT is selected romstage is supposed to have
    initialized cbmem. Therefore provide a weak function for the chipset
    to implement named cbmem_get_table_location(). When
    CONFIG_EARLY_CBMEM_INIT is selected cbmem_get_table_location() will be
    called to get the cbmem location and size. After that cbmem_initialize()
    is called.

Change-Id: Idc45a95f9d4b1d83eb3c6d4977f7a8c80c1ffe76
    Signed-off-by: Aaron Durbin 
---
 src/include/cbmem.h    |  5 +++++
 src/lib/hardwaremain.c | 10 ++++++++++
 2 files changed, 15 insertions(+)

diff --git a/src/include/cbmem.h b/src/include/cbmem.h
index d0f0c9a..1212cb2 100644
--- a/src/include/cbmem.h
+++ b/src/include/cbmem.h
@@ -67,6 +67,11 @@
 #ifndef __ASSEMBLER__
 #ifndef __PRE_RAM__
 extern uint64_t high_tables_base, high_tables_size;
+#if CONFIG_EARLY_CBMEM_INIT
+/* Return 0 on success, < 0 on error. */
+int __attribute__((weak)) cbmem_get_table_location(uint64_t *tables_base,
+                                                   uint64_t *tables_size);
+#endif
 #endif

int cbmem_initialize(void);
diff --git a/src/lib/hardwaremain.c b/src/lib/hardwaremain.c
index d2213d2..b29cc93 100644
--- a/src/lib/hardwaremain.c
+++ b/src/lib/hardwaremain.c
@@ -85,6 +85,16 @@ void hardwaremain(int boot_complete)
    /* FIXME: Is there a better way to handle this? */
    init_timer();

+	/* CONFIG_EARLY_CBMEM_INIT indicates that romstage initialized
+	 * the cbmem area. Therefore the table location can be initialized
+	 * early in ramstage if cbmem_get_table_location() is implemented.
+	 */
+#if CONFIG_EARLY_CBMEM_INIT
+	if (cbmem_get_table_location != NULL &&
+	    !cbmem_get_table_location(&high_tables_base, &high_tables_size))
+		cbmem_initialize();
+#endif
+
    timestamp_stash(TS_DEVICE_ENUMERATE);

/* Initialize chips early, they might disable unused devices. */