diff options
Diffstat (limited to 'cpu/mpc86xx')
| -rw-r--r-- | cpu/mpc86xx/interrupts.c | 20 | ||||
| -rw-r--r-- | cpu/mpc86xx/spd_sdram.c | 4 |
2 files changed, 22 insertions, 2 deletions
diff --git a/cpu/mpc86xx/interrupts.c b/cpu/mpc86xx/interrupts.c index 1df6cdc..49820bb 100644 --- a/cpu/mpc86xx/interrupts.c +++ b/cpu/mpc86xx/interrupts.c @@ -80,6 +80,26 @@ int interrupt_init(void) { int ret; + /* + * The IRQ0 on Rev 2 is pulled high (low in Rev 1.x) to + * implement PEX10 errata. As INT is active high, it + * will cause core to take 0x500 interrupt. + * + * Due to the PIC's default pass through mode, as soon + * as interrupts are enabled (MSR[EE] = 1), an interrupt + * will be taken and u-boot will hang. This is due to a + * hardware change (per an errata fix) on new revisions + * of the board with Rev 2.x parts. + * + * Setting the PIC to mixed mode prevents the hang. + */ + if ((get_svr() & 0xf0) == 0x20) { + volatile immap_t *immr = (immap_t *)CFG_IMMR; + immr->im_pic.gcr = MPC86xx_PICGCR_RST; + while (immr->im_pic.gcr & MPC86xx_PICGCR_RST); + immr->im_pic.gcr = MPC86xx_PICGCR_MODE; + } + /* call cpu specific function from $(CPU)/interrupts.c */ ret = interrupt_init_cpu(&decrementer_count); diff --git a/cpu/mpc86xx/spd_sdram.c b/cpu/mpc86xx/spd_sdram.c index b18e822..ac9ff81 100644 --- a/cpu/mpc86xx/spd_sdram.c +++ b/cpu/mpc86xx/spd_sdram.c @@ -284,9 +284,9 @@ spd_init(unsigned char i2c_address, unsigned int ddr_num, } /* - * Adjust DDR II IO voltage biasing. It just makes it work. + * Adjust DDR II IO voltage biasing. Rev1 only */ - if (spd.mem_type == SPD_MEMTYPE_DDR2) { + if (((get_svr() & 0xf0) == 0x10) && (spd.mem_type == SPD_MEMTYPE_DDR2)) { gur->ddrioovcr = (0 | 0x80000000 /* Enable */ | 0x10000000 /* VSEL to 1.8V */ |