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/*
* Copyright (C) ST-Ericsson SA 2010
*
* Author: Mikael Larsson <mikael.xt.larsson@stericsson.com> for ST-Ericsson.
*
* License terms: GNU General Public License (GPL), version 2.
*/
#include <common.h>
#include <malloc.h>
#include <part.h>
#include <mmc.h>
#include <asm/arch/ab8500.h>
#include <asm/arch/itp.h>
#include <asm/arch/cspsa_fp.h>
#include <asm/arch/sec_bridge.h>
#include <asm/arch/cpu.h>
#define IPL_ITEM_ID 0x02
static u32 cspsa_key;
static int itp_load_ipl(block_dev_desc_t *block_dev)
{
u32 offset;
u32 size;
u32 loadaddr;
u32 returnvalue;
int ab8500_cutid;
debug("itp_load_ipl\n");
/* Check if IPL partition is present */
if (get_entry_info_toc(block_dev, ITP_TOC_IPL_NAME, &offset,
&size, &loadaddr)) {
printf("itp_load_ipl: ipl toc entry not present\n");
return 1;
}
/* Get CutID */
ab8500_cutid = ab8500_read(AB8500_MISC, AB8500_REV_REG);
returnvalue = sec_bridge_call_secure_service((u32)ISSWAPI_SECURE_LOAD,
SEC_ROM_FORCE_CLEAN_MASK,
IPL_ITEM_ID,
ab8500_cutid);
if (returnvalue != SEC_ROM_RET_OK) {
printf("itp_load_ipl: ISSWAPI_SECURE_LOAD: %d\n",
returnvalue);
return 1;
}
return 0;
}
static int itp_load_toc_entry(block_dev_desc_t *block_dev,
const char *partname,
int verify_signature,
u32 *loadaddress)
{
u32 n;
u32 offset;
u32 size;
#if defined(CONFIG_SECURE_KERNEL_BOOT)
u32 real_loadaddr = 0;
u32 size_in_bytes = 0;
#endif
debug("itp_load_toc_entry: Loading %s\n", partname);
if (get_entry_info_toc(block_dev, partname, &offset,
&size, loadaddress)) {
HREF_PRINTF("itp_load_toc_entry: %s not present\n", partname);
return 1;
}
#if defined(CONFIG_SECURE_KERNEL_BOOT)
if (verify_signature) {
size_in_bytes = size;
real_loadaddr = *loadaddress;
/*
* We might need an offset, since ISSW doesn't support
* address 0.
*/
if (*loadaddress == 0)
*loadaddress = *loadaddress + block_dev->blksz;
}
#else
if (verify_signature) {
debug("itp_load_toc_entry: secure boot disabled so verify signature has no effect\n");
}
#endif
size = (size / block_dev->blksz) +
((size % block_dev->blksz) ? 1 : 0);
n = block_dev->block_read(block_dev->dev,
offset / block_dev->blksz,
size,
(void *) *loadaddress);
if (n != size) {
printf("itp_load_toc_entry: Failed to load %s!\n", partname);
return 1;
}
#if defined(CONFIG_SECURE_KERNEL_BOOT)
if (verify_signature) {
debug("itp_load_toc_entry: Verifying image...\n");
if (sec_bridge_verify_itp_image(loadaddress)) {
printf("itp_load_toc_entry: Failed to verify image %s!\n", partname);
return 1;
}
if (real_loadaddr != *loadaddress) {
/*
* Loadaddr is moved, need to move it back to ensure
* binary is not put out of order...
*/
memmove((void *)(real_loadaddr), (void*)*loadaddress, size_in_bytes);
*loadaddress = real_loadaddr;
}
}
#endif
return 0;
}
int itp_read_config(block_dev_desc_t *block_dev)
{
if (cspsa_fp_read(block_dev,
ITP_CSPSA_KEY,
&cspsa_key)) {
HREF_PRINTF("itp_read_config: config not present. "
"Using default values\n");
cspsa_key = (ITP_LOAD_MODEM | ITP_LOAD_KERNEL);
}
return 0;
}
int itp_is_itp_in_config(void)
{
return cspsa_key & ITP_LOAD_ITP;
}
/*
* itp_load_itp_and_modem - Loads itp and modem depending on config.
* If itp is loaded ok it will be executed and u-boot execution will stop
*/
int itp_load_itp_and_modem(block_dev_desc_t *block_dev)
{
int retval = 0;
u32 loadaddress;
debug("\nitp_load_itp_and_modem\n");
if (sec_bridge_init_bridge()) {
retval = 1;
goto exit;
}
if (cspsa_key & ITP_LOAD_MODEM) {
if (itp_load_toc_entry(block_dev,
ITP_TOC_MODEM_NAME,
0, /* verify_signature false */
&loadaddress)) {
retval = 1;
goto exit;
}
if (itp_load_ipl(block_dev)) {
retval = 1;
goto exit;
}
}
if (cspsa_key & ITP_LOAD_ITP) {
if (itp_load_toc_entry(block_dev,
ITP_TOC_ITP_NAME,
1, /* verify_signature true */
&loadaddress)) {
retval = 1;
goto exit;
}
}
exit:
/* Always Flush */
sec_bridge_flush_issw();
if ((cspsa_key & ITP_LOAD_ITP) && !retval)
/* U-boot execution will end here */
((void (*)(void))loadaddress)();
/* Return on error */
return retval;
}
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