diff options
Diffstat (limited to 'arch/ppc/kernel/gemini_setup.c')
-rw-r--r-- | arch/ppc/kernel/gemini_setup.c | 58 |
1 files changed, 45 insertions, 13 deletions
diff --git a/arch/ppc/kernel/gemini_setup.c b/arch/ppc/kernel/gemini_setup.c index aee01f105..57ea34687 100644 --- a/arch/ppc/kernel/gemini_setup.c +++ b/arch/ppc/kernel/gemini_setup.c @@ -36,7 +36,6 @@ void gemini_setup_pci_ptrs(void); -static int l2_printed = 0; static unsigned char gemini_switch_map = 0; static char *gemini_board_families[] = { "VGM", "VSS", "KGM", "VGR", "KSS" @@ -178,10 +177,8 @@ void __init gemini_setup_arch(void) /* take special pains to map the MPIC, since it isn't mapped yet */ gemini_openpic_init(); - /* start the L2 */ gemini_init_l2(); - } @@ -219,7 +216,6 @@ gemini_get_clock_speed(void) return clock; } - #define L2CR_PIPE_LATEWR (0x01800000) /* late-write SRAM */ #define L2CR_L2CTL (0x00100000) /* RAM control */ #define L2CR_INST_DISABLE (0x00400000) /* disable for insn's */ @@ -259,18 +255,17 @@ void __init gemini_init_l2(void) probably always going to be late-write". --Dan */ if (reg & 0xc0) { - if (!l2_printed) { - printk("Enabling 750 L2 cache: %dKb\n", - (128 << ((reg & 0xc0)>>6))); - l2_printed=1; - } - + printk("Enabling 750 L2 cache: %dKb\n", + (128 << ((reg & 0xc0)>>6))); /* take the size given */ cache = (((reg>>6) & 0x3)<<28); } else + { + printk("Enabling 750 L2 cache: 1M\n"); /* default of 1Mb */ cache = 0x3<<28; + } reg &= 0x3; @@ -278,6 +273,7 @@ void __init gemini_init_l2(void) things. If found, tune it down to 1:1.5. -- Dan */ if (!reg) { +printk("3\n"); speed = gemini_get_clock_speed(); if (speed >= 300) { @@ -297,7 +293,10 @@ void __init gemini_init_l2(void) write-through. This is fixed in IBM's 3.1 rev (I'm told), but for now, always make 2.x versions use L2 write-through. --Dan */ if (((_get_PVR()>>8) & 0xf) <= 2) + { cache |= L2CR_L2WT; + printk("L2 cache: Enabling Write-Through due to 750 Errata.\n"); + } #endif cache |= L2CR_PIPE_LATEWR|L2CR_L2CTL|L2CR_INST_DISABLE; _set_L2CR(0); @@ -332,7 +331,7 @@ void __init gemini_init_IRQ(void) /* gemini has no 8259 */ open_pic.irq_offset = 0; - for( i=0; i < OPENPIC_VEC_SPURIOUS; i++ ) + for( i=0; i < NR_IRQS; i++ ) irq_desc[i].ctl = &open_pic; openpic_init(1); #ifdef __SMP__ @@ -480,6 +479,39 @@ void __init gemini_calibrate_decr(void) count_period_den = freq / 1000000; } +int gemini_get_irq( struct pt_regs *regs ) +{ + int irq; + + irq = openpic_irq( smp_processor_id() ); + if (irq == OPENPIC_VEC_SPURIOUS) + /* + * Spurious interrupts should never be + * acknowledged + */ + irq = -1; + /* + * I would like to openpic_eoi here but there seem to be timing problems + * between the openpic ack and the openpic eoi. + * -- Cort + */ + return irq; +} + +void gemini_post_irq(int irq) +{ + /* + * If it's an i8259 irq then we've already done the + * openpic irq. So we just check to make sure the controller + * is an openpic and if it is then eoi + * + * We do it this way since our irq_desc[irq].ctl can change + * with RTL and no longer be open_pic -- Cort + */ + if ( irq >= open_pic.irq_offset) + openpic_eoi( smp_processor_id() ); +} + void __init gemini_init(unsigned long r3, unsigned long r4, unsigned long r5, unsigned long r6, unsigned long r7) @@ -506,8 +538,8 @@ void __init gemini_init(unsigned long r3, unsigned long r4, unsigned long r5, ppc_md.get_cpuinfo = gemini_get_cpuinfo; ppc_md.irq_cannonicalize = NULL; ppc_md.init_IRQ = gemini_init_IRQ; - ppc_md.get_irq = chrp_get_irq; - ppc_md.post_irq = chrp_post_irq; + ppc_md.get_irq = gemini_get_irq; + ppc_md.post_irq = gemini_post_irq; ppc_md.init = NULL; ppc_md.restart = gemini_restart; |