diff options
Diffstat (limited to 'cpu')
| -rw-r--r-- | cpu/mcf52x2/cpu.c | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/cpu/mcf52x2/cpu.c b/cpu/mcf52x2/cpu.c index aa6b2bd..ce59d39 100644 --- a/cpu/mcf52x2/cpu.c +++ b/cpu/mcf52x2/cpu.c @@ -49,11 +49,43 @@ #endif #ifdef CONFIG_M5271 +/* + * Both MCF5270 and MCF5271 are members of the MPC5271 family. Try to + * determine which one we are running on, based on the Chip Identification + * Register (CIR). + */ int checkcpu (void) { char buf[32]; + unsigned short cir; /* Chip Identification Register */ + unsigned short pin; /* Part identification number */ + unsigned char prn; /* Part revision number */ + char *cpu_model; + + cir = mbar_readShort(MCF_CCM_CIR); + pin = cir >> MCF_CCM_CIR_PIN_LEN; + prn = cir & MCF_CCM_CIR_PRN_MASK; + + switch (pin) { + case MCF_CCM_CIR_PIN_MCF5270: + cpu_model = "5270"; + break; + case MCF_CCM_CIR_PIN_MCF5271: + cpu_model = "5271"; + break; + default: + cpu_model = NULL; + break; + } + + if (cpu_model) + printf("CPU: Freescale ColdFire MCF%s rev. %hu, at %s MHz\n", + cpu_model, prn, strmhz(buf, CFG_CLK)); + else + printf("CPU: Unknown - Freescale ColdFire MCF5271 family" + " (PIN: 0x%x) rev. %hu, at %s MHz\n", + pin, prn, strmhz(buf, CFG_CLK)); - printf ("CPU: Freescale Coldfire MCF5271 at %s MHz\n", strmhz(buf, CFG_CLK)); return 0; } |