diff options
Diffstat (limited to 'arch/ppc/kernel/oak_setup.c')
| -rw-r--r-- | arch/ppc/kernel/oak_setup.c | 237 |
1 files changed, 223 insertions, 14 deletions
diff --git a/arch/ppc/kernel/oak_setup.c b/arch/ppc/kernel/oak_setup.c index a9c9137a0..ad2c224bb 100644 --- a/arch/ppc/kernel/oak_setup.c +++ b/arch/ppc/kernel/oak_setup.c @@ -7,26 +7,74 @@ * Description: * Architecture- / platform-specific boot-time initialization code for * the IBM PowerPC 403GCX "Oak" evaluation board. Adapted from original - * code by Gary Thomas, Cort Dougan <cort@cs.nmt.edu>, and Dan Malek - * <dmalek@jlc.net>. + * code by Gary Thomas, Cort Dougan <cort@fsmlabs.com>, and Dan Malek + * <dan@net4x.com>. * */ #include <linux/config.h> #include <linux/init.h> +#include <linux/smp.h> +#include <linux/threads.h> +#include <linux/interrupt.h> +#include <linux/param.h> #include <linux/string.h> +#include <asm/processor.h> +#include <asm/board.h> #include <asm/machdep.h> #include <asm/page.h> +#include "local_irq.h" +#include "ppc4xx_pic.h" +#include "time.h" #include "oak_setup.h" +/* Function Prototypes */ +extern void abort(void); + +/* Global Variables */ + +unsigned char __res[sizeof(bd_t)]; + + +/* + * void __init oak_init() + * + * Description: + * This routine... + * + * Input(s): + * r3 - Optional pointer to a board information structure. + * r4 - Optional pointer to the physical starting address of the init RAM + * disk. + * r5 - Optional pointer to the physical ending address of the init RAM + * disk. + * r6 - Optional pointer to the physical starting address of any kernel + * command-line parameters. + * r7 - Optional pointer to the physical ending address of any kernel + * command-line parameters. + * + * Output(s): + * N/A + * + * Returns: + * N/A + * + */ void __init oak_init(unsigned long r3, unsigned long r4, unsigned long r5, unsigned long r6, unsigned long r7) { -#if 0 + /* + * If we were passed in a board information, copy it into the + * residual data area. + */ + if (r3) { + memcpy((void *)__res, (void *)(r3 + KERNELBASE), sizeof(bd_t)); + } + #if defined(CONFIG_BLK_DEV_INITRD) /* * If the init RAM disk has been configured in, and there's a valid @@ -44,24 +92,25 @@ oak_init(unsigned long r3, unsigned long r4, unsigned long r5, *(char *)(r7 + KERNELBASE) = 0; strcpy(cmd_line, (char *)(r6 + KERNELBASE)); } -#endif /* 0 */ + + /* Initialize machine-dependency vectors */ ppc_md.setup_arch = oak_setup_arch; - ppc_md.setup_residual = NULL; + ppc_md.setup_residual = oak_setup_residual; ppc_md.get_cpuinfo = NULL; ppc_md.irq_cannonicalize = NULL; - ppc_md.init_IRQ = NULL; - ppc_md.get_irq = NULL; + ppc_md.init_IRQ = oak_init_IRQ; + ppc_md.get_irq = oak_get_irq; ppc_md.init = NULL; - ppc_md.restart = NULL; - ppc_md.power_off = NULL; - ppc_md.halt = NULL; + ppc_md.restart = oak_restart; + ppc_md.power_off = oak_power_off; + ppc_md.halt = oak_halt; - ppc_md.time_init = NULL; - ppc_md.set_rtc_time = NULL; - ppc_md.get_rtc_time = NULL; - ppc_md.calibrate_decr = NULL; + ppc_md.time_init = oak_time_init; + ppc_md.set_rtc_time = oak_set_rtc_time; + ppc_md.get_rtc_time = oak_get_rtc_time; + ppc_md.calibrate_decr = oak_calibrate_decr; ppc_md.kbd_setkeycode = NULL; ppc_md.kbd_getkeycode = NULL; @@ -77,8 +126,168 @@ oak_init(unsigned long r3, unsigned long r4, unsigned long r5, return; } +/* + * Document me. + */ void __init oak_setup_arch(void) { + /* XXX - Implement me */ +} + +/* + * int oak_setup_residual() + * + * Description: + * This routine pretty-prints the platform's internal CPU and bus clock + * frequencies into the buffer for usage in /proc/cpuinfo. + * + * Input(s): + * *buffer - Buffer into which CPU and bus clock frequencies are to be + * printed. + * + * Output(s): + * *buffer - Buffer with the CPU and bus clock frequencies. + * + * Returns: + * The number of bytes copied into 'buffer' if OK, otherwise zero or less + * on error. + */ +int +oak_setup_residual(char *buffer) +{ + int len = 0; + bd_t *bp = (bd_t *)__res; + + len += sprintf(len + buffer, + "clock\t\t: %dMHz\n" + "bus clock\t\t: %dMHz\n", + bp->bi_intfreq / 1000000, + bp->bi_busfreq / 1000000); + + return (len); +} + +/* + * Document me. + */ +void __init +oak_init_IRQ(void) +{ + int i; + + ppc4xx_pic_init(); + + for (i = 0; i < NR_IRQS; i++) { + irq_desc[i].handler = ppc4xx_pic; + } + + return; +} + +/* + * Document me. + */ +int +oak_get_irq(struct pt_regs *regs) +{ + return (ppc4xx_pic_get_irq(regs)); +} + +/* + * Document me. + */ +void +oak_restart(char *cmd) +{ + abort(); +} + +/* + * Document me. + */ +void +oak_power_off(void) +{ + oak_restart(NULL); +} + +/* + * Document me. + */ +void +oak_halt(void) +{ + oak_restart(NULL); +} + +/* + * Document me. + */ +void __init +oak_time_init(void) +{ + /* XXX - Implement me */ +} + +/* + * Document me. + */ +int __init +oak_set_rtc_time(unsigned long time) +{ + /* XXX - Implement me */ + + return (0); +} + +/* + * Document me. + */ +unsigned long __init +oak_get_rtc_time(void) +{ + /* XXX - Implement me */ + + return (0); +} + +/* + * void __init oak_calibrate_decr() + * + * Description: + * This routine retrieves the internal processor frequency from the board + * information structure, sets up the kernel timer decrementer based on + * that value, enables the 403 programmable interval timer (PIT) and sets + * it up for auto-reload. + * + * Input(s): + * N/A + * + * Output(s): + * N/A + * + * Returns: + * N/A + * + */ +void __init +oak_calibrate_decr(void) +{ + unsigned int freq; + bd_t *bip = (bd_t *)__res; + + freq = bip->bi_intfreq; + + decrementer_count = freq / HZ; + count_period_num = 1; + count_period_den = freq; + + /* Enable the PIT and set auto-reload of its value */ + + mtspr(SPRN_TCR, TCR_PIE | TCR_ARE); + + /* Clear any pending timer interrupts */ + mtspr(SPRN_TSR, TSR_ENW | TSR_WIS | TSR_PIS | TSR_FIS); } |