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[platform][zynq] save the reboot status register and clear reason bits

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Pretty print the reason bits.
This commit is contained in:
Travis Geiselbrecht
2015-06-19 15:36:56 -07:00
parent b8870a3c43
commit f45b123db0
1 changed files with 16 additions and 2 deletions
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18
platform/zynq/platform.c
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@@ -46,6 +46,9 @@ STATIC_ASSERT(SDRAM_SIZE != 0);
#define ZYNQ_WATCHDOG_TIMEOUT (1000) // 1 second
#endif
/* saved REBOOT_STATUS register */
static uint32_t saved_reboot_status;
/* target can specify this as the initial jam table to set up the soc */
__WEAK void ps7_init(void) { }
@@ -57,7 +60,6 @@ extern const zynq_pll_cfg_tree_t zynq_pll_cfg;
extern const zynq_clk_cfg_t zynq_clk_cfg;
extern const zynq_ddriob_cfg_t zynq_ddriob_cfg;
static inline int reg_poll(uint32_t addr,uint32_t mask)
{
uint32_t iters = UINT_MAX;
@@ -338,6 +340,10 @@ void platform_early_init(void)
/* zynq manual says this is mandatory for cache init */
*REG32(SLCR_BASE + 0xa1c) = 0x020202;
/* save the reboot status register, clear bits we dont want to save */
saved_reboot_status = SLCR->REBOOT_STATUS;
SLCR->REBOOT_STATUS &= ~(0xff << 16);
/* early initialize the uart so we can printf */
uart_init_early();
@@ -416,7 +422,15 @@ void platform_init(void)
/* enable if we want to see some hardware boot status */
#if LK_DEBUGLEVEL > 0
printf("zynq boot status:\n");
printf("\tREBOOT_STATUS 0x%x\n", SLCR_REG(REBOOT_STATUS));
printf("\tREBOOT_STATUS 0x%x\n", saved_reboot_status);
if (BIT(saved_reboot_status, 16)) printf("\t\tSWDT_RST\n");
if (BIT(saved_reboot_status, 17)) printf("\t\tAWDT0_RST\n");
if (BIT(saved_reboot_status, 18)) printf("\t\tAWDT1_RST\n");
if (BIT(saved_reboot_status, 19)) printf("\t\tSLC_RST\n");
if (BIT(saved_reboot_status, 20)) printf("\t\tDBG_RST\n");
if (BIT(saved_reboot_status, 21)) printf("\t\tSRST_B\n");
if (BIT(saved_reboot_status, 22)) printf("\t\tPOR\n");
printf("\tREBOOT_STATE 0x%lx\n", BITS_SHIFT(saved_reboot_status, 31, 24));
printf("\tboot mode 0x%x\n", zynq_get_boot_mode());
#endif
}