Add support for working on in-memory CMOS data (eg.

as loaded from a file).

Signed-off-by: Patrick Georgi <patrick.georgi@secunet.com>
Acked-by: Stefan Reinauer <stepan@coreboot.org>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6284 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

diff --git a/util/nvramtool/cmos_lowlevel.c b/util/nvramtool/cmos_lowlevel.c
index 9f44a0b18ab7e8f6281634b328bffd96af7cf086..8e19f515aa70743dadd57c0cd48111f30cd6abcd 100644 (file)
--- a/util/nvramtool/cmos_lowlevel.c
+++ b/util/nvramtool/cmos_lowlevel.c
@@ -37,20 +37,36 @@
 #include "cmos_lowlevel.h"
 
 /* Hardware Abstraction Layer: lowlevel byte-wise write access */
+
 typedef struct {
        void (*init)(void* data);
        unsigned char (*read)(unsigned addr);
        void (*write)(unsigned addr, unsigned char value);
+       void (*set_iopl)(int level);
 } cmos_access_t;
 
 static void cmos_hal_init(void* data);
 static unsigned char cmos_hal_read(unsigned addr);
 static void cmos_hal_write(unsigned addr, unsigned char value);
+static void cmos_set_iopl(int level);
 
 static cmos_access_t cmos_hal = {
        .init = cmos_hal_init,
        .read = cmos_hal_read,
-       .write = cmos_hal_write
+       .write = cmos_hal_write,
+       .set_iopl = cmos_set_iopl,
+};
+
+static void mem_hal_init(void* data);
+static unsigned char mem_hal_read(unsigned addr);
+static void mem_hal_write(unsigned addr, unsigned char value);
+static void mem_set_iopl(int level);
+
+static cmos_access_t memory_hal = {
+       .init = mem_hal_init,
+       .read = mem_hal_read,
+       .write = mem_hal_write,
+       .set_iopl = mem_set_iopl,
 };
 
 static cmos_access_t *current_access = &cmos_hal;
@@ -96,6 +112,37 @@ static void cmos_hal_write(unsigned index, unsigned char value)
        OUTB(value, port_1);
 }
 
+static unsigned char* mem_hal_data = (unsigned char*)-1;
+static void mem_hal_init(void *data)
+{
+       mem_hal_data = data;
+}
+
+static unsigned char mem_hal_read(unsigned index)
+{
+       assert(mem_hal_data != (unsigned char*)-1);
+       return mem_hal_data[index];
+}
+
+static void mem_hal_write(unsigned index, unsigned char value)
+{
+       assert(mem_hal_data != (unsigned char*)-1);
+       mem_hal_data[index] = value;
+}
+
+void select_hal(hal_t hal, void *data)
+{
+       switch(hal) {
+               case HAL_CMOS:
+                       current_access = &cmos_hal;
+                       break;
+               case HAL_MEMORY:
+                       current_access = &memory_hal;
+                       break;
+       }
+       current_access->init(data);
+}
+
 /* Bit-level access */
 typedef struct {
        unsigned byte_index;
@@ -302,6 +349,11 @@ void cmos_write_all(unsigned char data[])
  * level is therefore somewhat dangerous.
  ****************************************************************************/
 void set_iopl(int level)
+{
+       current_access->set_iopl(level);
+}
+
+static void cmos_set_iopl(int level)
 {
 #if defined(__FreeBSD__)
        static int io_fd = -1;
@@ -333,6 +385,10 @@ void set_iopl(int level)
 #endif
 }
 
+static void mem_set_iopl(__attribute__ ((unused)) int level)
+{
+}
+
 /****************************************************************************
  * verify_cmos_op
  *

diff --git a/util/nvramtool/cmos_lowlevel.h b/util/nvramtool/cmos_lowlevel.h
index ebe82a7a11257455549c4f6b112049257ffe6ca2..3c2efce1e1f05dae16247b3bc5df0d5c3048adc1 100644 (file)
--- a/util/nvramtool/cmos_lowlevel.h
+++ b/util/nvramtool/cmos_lowlevel.h
@@ -34,6 +34,9 @@
 #include "common.h"
 #include "layout.h"
 
+typedef enum { HAL_CMOS, HAL_MEMORY } hal_t;
+void select_hal(hal_t hal, void *data);
+
 #define CMOS_AREA_OUT_OF_RANGE (CMOS_RESULT_START + 0)
 #define CMOS_AREA_OVERLAPS_RTC (CMOS_RESULT_START + 1)
 #define CMOS_AREA_TOO_WIDE (CMOS_RESULT_START + 2)