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omap3/sys_info: provide interface to read die id

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introduce get_die_id() function which allows generation of
information such as fake MAC address from the processor ID code.

Signed-off-by: Nishanth Menon <nm@ti.com>
This commit is contained in:
Nishanth Menon 2014-03-28 11:00:05 -05:00 committed by Tom Rini
parent 8a0c6d6fa9
commit 79e7e87f91
2 changed files with 15 additions and 5 deletions
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19
arch/arm/cpu/armv7/omap3/sys_info.c
View File

@ -40,12 +40,24 @@ static char *rev_s_37xx[CPU_37XX_MAX_REV] = {
"1.2"};
#endif /* CONFIG_DISPLAY_CPUINFO */
/*****************************************************************
* get_dieid(u32 *id) - read die ID
*****************************************************************/
void get_dieid(u32 *id)
{
struct ctrl_id *id_base = (struct ctrl_id *)OMAP34XX_ID_L4_IO_BASE;
id[3] = readl(&id_base->die_id_0);
id[2] = readl(&id_base->die_id_1);
id[1] = readl(&id_base->die_id_2);
id[0] = readl(&id_base->die_id_3);
}
/*****************************************************************
* dieid_num_r(void) - read and set die ID
*****************************************************************/
void dieid_num_r(void)
{
struct ctrl_id *id_base = (struct ctrl_id *)OMAP34XX_ID_L4_IO_BASE;
char *uid_s, die_id[34];
u32 id[4];
@ -54,10 +66,7 @@ void dieid_num_r(void)
uid_s = getenv("dieid#");
if (uid_s == NULL) {
id[3] = readl(&id_base->die_id_0);
id[2] = readl(&id_base->die_id_1);
id[1] = readl(&id_base->die_id_2);
id[0] = readl(&id_base->die_id_3);
get_dieid(id);
sprintf(die_id, "%08x%08x%08x%08x", id[0], id[1], id[2], id[3]);
setenv("dieid#", die_id);
uid_s = die_id;

1
arch/arm/include/asm/arch-omap3/sys_proto.h
View File

@ -68,6 +68,7 @@ void make_cs1_contiguous(void);
void omap_nand_switch_ecc(uint32_t, uint32_t);
void power_init_r(void);
void dieid_num_r(void);
void get_dieid(u32 *id);
void do_omap3_emu_romcode_call(u32 service_id, u32 parameters);
void omap3_gp_romcode_call(u32 service_id, u32 parameter);
u32 warm_reset(void);