CBMEM: Add cbmem_late_set_table() and drop references to high_tables_base

This helper function is for compatibility only for chipsets that do
not implement get_top_of_ram() to support early CBMEM.

Also remove references to globals high_tables_base and _size under
arch/ and from two ARMv7 boards.

Change-Id: I17eee30635a0368b2ada06e0698425c5ef0ecc53
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/3902
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@google.com>

src/arch/armv7/tables.c

@@ -29,13 +29,6 @@
 
 #define MAX_COREBOOT_TABLE_SIZE (8 * 1024)
 
-/*
- * TODO: "High" tables are a convention used on x86. Maybe we can
- * clean up that naming at some point.
- */
-uint64_t high_tables_base = 0;
-uint64_t high_tables_size;
-
 void cbmem_arch_init(void)
 {
 }

src/arch/x86/boot/cbmem.c

@@ -25,9 +25,6 @@
  */
 void set_top_of_ram(uint64_t ramtop)
 {
-	high_tables_base = ramtop - HIGH_MEMORY_SIZE;
+	cbmem_late_set_table(ramtop - HIGH_MEMORY_SIZE, HIGH_MEMORY_SIZE);
-	high_tables_size = HIGH_MEMORY_SIZE;
-	printk(BIOS_DEBUG, "high_tables_base: %08llx, size %lld\n",
-		high_tables_base, high_tables_size);
 }
 #endif

src/arch/x86/boot/tables.c

@@ -32,8 +32,6 @@
 #include <lib.h>
 #include <smbios.h>
 
-uint64_t high_tables_base = 0;
-uint64_t high_tables_size;
 
 void cbmem_arch_init(void)
 {
@@ -227,9 +225,18 @@ struct lb_memory *write_tables(void)
 	if (high_table_pointer) {
 		unsigned long new_high_table_pointer;
 
+		/* FIXME: The high_table_base parameter is not reference when tables are high,
+		 * or high_table_pointer >1 MB.
+		 */
+#if CONFIG_DYNAMIC_CBMEM
+		u64 fixme_high_tables_base = 0;
+#else
+		u64 fixme_high_tables_base = high_tables_base;
+#endif
+
 		/* Also put a forwarder entry into 0-4K */
 		new_high_table_pointer = write_coreboot_table(low_table_start, low_table_end,
-				high_tables_base, high_table_pointer);
+				fixme_high_tables_base, high_table_pointer);
 
 		if (new_high_table_pointer > (high_table_pointer +
 					MAX_COREBOOT_TABLE_SIZE))

src/include/cbmem.h

@@ -137,6 +137,7 @@ void cbmem_add_lb_mem(struct lb_memory *mem);
 #ifndef __PRE_RAM__
 extern uint64_t high_tables_base, high_tables_size;
 void set_top_of_ram(uint64_t ramtop);
+void cbmem_late_set_table(uint64_t base, uint64_t size);
 void set_cbmem_toc(struct cbmem_entry *);
 #endif
 

src/lib/cbmem.c

@@ -42,6 +42,8 @@ struct cbmem_entry {
 } __attribute__((packed));
 
 #ifndef __PRE_RAM__
+uint64_t high_tables_base = 0;
+uint64_t high_tables_size = 0;
 static struct cbmem_entry *bss_cbmem_toc;
 
 struct cbmem_entry *__attribute__((weak)) get_cbmem_toc(void)
@@ -60,7 +62,15 @@ struct cbmem_entry *__attribute__((weak)) get_cbmem_toc(void)
 	printk(BIOS_WARNING, "WARNING: you need to define get_cbmem_toc() for your chipset\n");
 	return NULL;
 }
+#endif
 
+#if !defined(__PRE_RAM__)
+void cbmem_late_set_table(uint64_t base, uint64_t size)
+{
+	printk(BIOS_DEBUG, "CBMEM region %llx-%llx (%s)\n", base, base+size-1, __FUNCTION__);
+	high_tables_base = base;
+	high_tables_size = size;
+}
 #endif
 
 /**

src/mainboard/google/pit/mainboard.c

@@ -221,17 +221,22 @@ static void mainboard_init(device_t dev)
 	// gpio_info();
 }
 
+static void setup_cbmem(void)
+{
+	u64 size = CONFIG_COREBOOT_TABLES_SIZE;
+	u64 base = CONFIG_SYS_SDRAM_BASE +
+				((unsigned)CONFIG_DRAM_SIZE_MB << 20ULL) -
+				CONFIG_COREBOOT_TABLES_SIZE;
+	cbmem_late_set_table(base, size);
+	cbmem_init(base, size);
+}
+
 static void mainboard_enable(device_t dev)
 {
 	dev->ops->init = &mainboard_init;
 
 	/* set up coreboot tables */
-	/* FIXME: this should happen somewhere else */
+	setup_cbmem();
-	high_tables_size = CONFIG_COREBOOT_TABLES_SIZE;
-	high_tables_base = CONFIG_SYS_SDRAM_BASE +
-				((unsigned)CONFIG_DRAM_SIZE_MB << 20ULL) -
-				CONFIG_COREBOOT_TABLES_SIZE;
-	cbmem_init(high_tables_base, high_tables_size);
 
 	/* set up dcache and MMU */
 	/* FIXME: this should happen via resource allocator */

src/mainboard/google/snow/mainboard.c

@@ -262,17 +262,22 @@ static void mainboard_init(device_t dev)
 	// gpio_info();
 }
 
+static void setup_cbmem(void)
+{
+	u64 size = CONFIG_COREBOOT_TABLES_SIZE;
+	u64 base = CONFIG_SYS_SDRAM_BASE +
+				((unsigned)CONFIG_DRAM_SIZE_MB << 20ULL) -
+				CONFIG_COREBOOT_TABLES_SIZE;
+	cbmem_late_set_table(base, size);
+	cbmem_init(base, size);
+}
+
 static void mainboard_enable(device_t dev)
 {
 	dev->ops->init = &mainboard_init;
 
 	/* set up coreboot tables */
-	/* FIXME: this should happen somewhere else */
+	setup_cbmem();
-	high_tables_size = CONFIG_COREBOOT_TABLES_SIZE;
-	high_tables_base = CONFIG_SYS_SDRAM_BASE +
-				((unsigned)CONFIG_DRAM_SIZE_MB << 20ULL) -
-				CONFIG_COREBOOT_TABLES_SIZE;
-	cbmem_init(high_tables_base, high_tables_size);
 
 	/* set up dcache and MMU */
 	/* FIXME: this should happen via resource allocator */