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ARM: mx25: Print the source of reset

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Print the source of reset during boot.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
This commit is contained in:
Fabio Estevam 2011-09-02 05:38:55 +00:00 committed by Albert ARIBAUD
parent 986d0d1bc5
commit 957dc02474
1 changed files with 24 additions and 1 deletions
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25
arch/arm/cpu/arm926ejs/mx25/generic.c
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@ -105,6 +105,28 @@ ulong imx_get_perclk (int clk)
return lldiv (fref, div); return lldiv (fref, div);
} }
static char *get_reset_cause(void)
{
/* read RCSR register from CCM module */
struct ccm_regs *ccm =
(struct ccm_regs *)IMX_CCM_BASE;
u32 cause = readl(&ccm->rcsr) & 0x0f;
if (cause == 0)
return "POR";
else if (cause == 1)
return "RST";
else if ((cause & 2) == 2)
return "WDOG";
else if ((cause & 4) == 4)
return "SW RESET";
else if ((cause & 8) == 8)
return "JTAG";
else
return "unknown reset";
}
u32 get_cpu_rev(void) u32 get_cpu_rev(void)
{ {
@ -136,10 +158,11 @@ int print_cpuinfo (void)
char buf[32]; char buf[32];
u32 cpurev = get_cpu_rev(); u32 cpurev = get_cpu_rev();
printf("CPU: Freescale i.MX25 rev%d.%d%s at %s MHz\n\n", printf("CPU: Freescale i.MX25 rev%d.%d%s at %s MHz\n",
(cpurev & 0xF0) >> 4, (cpurev & 0x0F), (cpurev & 0xF0) >> 4, (cpurev & 0x0F),
((cpurev & 0x8000) ? " unknown" : ""), ((cpurev & 0x8000) ? " unknown" : ""),
strmhz (buf, imx_get_armclk ())); strmhz (buf, imx_get_armclk ()));
printf("Reset cause: %s\n\n", get_reset_cause());
return 0; return 0;
} }
#endif #endif