CBMEM CONSOLE: Add CBMEM type for console buffer.

[coreboot.git] / src / lib / cbmem.c

diff --git a/src/lib/cbmem.c b/src/lib/cbmem.c
index eecefcd5bf48af613dcaae8e9cb228c41f83f733..b09b070d7afe99f8c8f632e9c32bbb021a16affc 100644 (file)
--- a/src/lib/cbmem.c
+++ b/src/lib/cbmem.c
@@ -21,6 +21,9 @@
 #include <string.h>
 #include <cbmem.h>
 #include <console/console.h>
+#if CONFIG_HAVE_ACPI_RESUME && !defined(__PRE_RAM__)
+#include <arch/acpi.h>
+#endif
 
 // The CBMEM TOC reserves 512 bytes to keep
 // the other entries somewhat aligned.
@@ -118,6 +121,22 @@ void *cbmem_add(u32 id, u64 size)
 {
        struct cbmem_entry *cbmem_toc;
        int i;
+       void *p;
+
+       /*
+        * This could be a restart, check if the section is there already. It
+        * is remotely possible that the dram contents persisted over the
+        * bootloader upgrade AND the same section now needs more room, but
+        * this is quite a remote possibility and it is ignored here.
+        */
+       p = cbmem_find(id);
+       if (p) {
+               printk(BIOS_NOTICE,
+                      "CBMEM section %x: using existing location at %p.\n",
+                      id, p);
+               return p;
+       }
+
        cbmem_toc = get_cbmem_toc();
 
        if (cbmem_toc == NULL) {
@@ -183,28 +202,34 @@ void *cbmem_find(u32 id)
        return (void *)NULL;
 }
 
-#ifndef __PRE_RAM__
-#if CONFIG_HAVE_ACPI_RESUME
-extern u8 acpi_slp_type;
+#if CONFIG_EARLY_CBMEM_INIT || !defined(__PRE_RAM__)
+/* Returns True if it was not intialized before. */
+int cbmem_initialize(void)
+{
+       int rv = 0;
+
+#ifdef __PRE_RAM__
+       extern unsigned long get_top_of_ram(void);
+       uint64_t high_tables_base = get_top_of_ram() - HIGH_MEMORY_SIZE;
+       uint64_t high_tables_size = HIGH_MEMORY_SIZE;
 #endif
 
-void cbmem_initialize(void)
-{
-#if CONFIG_HAVE_ACPI_RESUME
-       if (acpi_slp_type == 3) {
-               if (!cbmem_reinit(high_tables_base)) {
-                       /* Something went wrong, our high memory area got wiped */
+       /* We expect the romstage to always initialize it. */
+       if (!cbmem_reinit(high_tables_base)) {
+#if CONFIG_HAVE_ACPI_RESUME && !defined(__PRE_RAM__)
+               /* Something went wrong, our high memory area got wiped */
+               if (acpi_slp_type == 3 || acpi_slp_type == 2)
                        acpi_slp_type = 0;
-                       cbmem_init(high_tables_base, high_tables_size);
-               }
-       } else {
+#endif
                cbmem_init(high_tables_base, high_tables_size);
+               rv = 1;
        }
-#else
-       cbmem_init(high_tables_base, high_tables_size);
-#endif
+#ifndef __PRE_RAM__
        cbmem_arch_init();
+#endif
+       return rv;
 }
+#endif
 
 #ifndef __PRE_RAM__
 void cbmem_list(void)
@@ -230,6 +255,8 @@ void cbmem_list(void)
                case CBMEM_ID_MPTABLE:   printk(BIOS_DEBUG, "SMP TABLE  "); break;
                case CBMEM_ID_RESUME:    printk(BIOS_DEBUG, "ACPI RESUME"); break;
                case CBMEM_ID_SMBIOS:    printk(BIOS_DEBUG, "SMBIOS     "); break;
+               case CBMEM_ID_TIMESTAMP: printk(BIOS_DEBUG, "TIME STAMP "); break;
+               case CBMEM_ID_CONSOLE:   printk(BIOS_DEBUG, "CONSOLE    "); break;
                default: printk(BIOS_DEBUG, "%08x ", cbmem_toc[i].id);
                }
                printk(BIOS_DEBUG, "%08llx ", cbmem_toc[i].base);
@@ -238,5 +265,4 @@ void cbmem_list(void)
 }
 #endif
 
-#endif