^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* Prom access routines for the sun3x */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/tty.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/console.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <asm/page.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <asm/setup.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/traps.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <asm/sun3xprom.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/idprom.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/segment.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/sun3ints.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <asm/openprom.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/machines.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) void (*sun3x_putchar)(int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) int (*sun3x_getchar)(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) int (*sun3x_mayget)(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) int (*sun3x_mayput)(int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) void (*sun3x_prom_reboot)(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) e_vector sun3x_prom_abort;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct linux_romvec *romvec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) /* prom vector table */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) e_vector *sun3x_prom_vbr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) /* Handle returning to the prom */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) void sun3x_halt(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) /* Disable interrupts while we mess with things */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) local_irq_save(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) /* Restore prom vbr */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) asm volatile ("movec %0,%%vbr" : : "r" ((void*)sun3x_prom_vbr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) /* Restore prom NMI clock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) // sun3x_disable_intreg(5);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) sun3_enable_irq(7);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) /* Let 'er rip */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) asm volatile ("trap #14");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) /* Restore everything */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) sun3_disable_irq(7);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) sun3_enable_irq(5);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) asm volatile ("movec %0,%%vbr" : : "r" ((void*)vectors));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) local_irq_restore(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) void sun3x_reboot(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) /* This never returns, don't bother saving things */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) local_irq_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) /* Restore prom vbr */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) asm volatile ("movec %0,%%vbr" : : "r" ((void*)sun3x_prom_vbr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) /* Restore prom NMI clock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) sun3_disable_irq(5);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) sun3_enable_irq(7);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) /* Let 'er rip */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) (*romvec->pv_reboot)("vmlinux");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) static void sun3x_prom_write(struct console *co, const char *s,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) unsigned int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) while (count--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (*s == '\n')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) sun3x_putchar('\r');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) sun3x_putchar(*s++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) /* debug console - write-only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) static struct console sun3x_debug = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) .name = "debug",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) .write = sun3x_prom_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) .flags = CON_PRINTBUFFER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) .index = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) void __init sun3x_prom_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) /* Read the vector table */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) sun3x_putchar = *(void (**)(int)) (SUN3X_P_PUTCHAR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) sun3x_getchar = *(int (**)(void)) (SUN3X_P_GETCHAR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) sun3x_mayget = *(int (**)(void)) (SUN3X_P_MAYGET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) sun3x_mayput = *(int (**)(int)) (SUN3X_P_MAYPUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) sun3x_prom_reboot = *(void (**)(void)) (SUN3X_P_REBOOT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) sun3x_prom_abort = *(e_vector *) (SUN3X_P_ABORT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) romvec = (struct linux_romvec *)SUN3X_PROM_BASE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) idprom_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) if (!((idprom->id_machtype & SM_ARCH_MASK) == SM_SUN3X)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) pr_warn("Machine reports strange type %02x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) idprom->id_machtype);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) pr_warn("Pretending it's a 3/80, but very afraid...\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) idprom->id_machtype = SM_SUN3X | SM_3_80;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) /* point trap #14 at abort.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) * XXX this is futile since we restore the vbr first - oops
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) vectors[VEC_TRAP14] = sun3x_prom_abort;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) static int __init sun3x_debug_setup(char *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) /* If debug=prom was specified, start the debug console */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) if (MACH_IS_SUN3X && !strcmp(arg, "prom"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) register_console(&sun3x_debug);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) early_param("debug", sun3x_debug_setup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) /* some prom functions to export */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) int prom_getintdefault(int node, char *property, int deflt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return deflt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) int prom_getbool (int node, char *prop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) void prom_printf(char *fmt, ...)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) void prom_halt (void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) sun3x_halt();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) /* Get the idprom and stuff it into buffer 'idbuf'. Returns the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) * format type. 'num_bytes' is the number of bytes that your idbuf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) * has space for. Returns 0xff on error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) unsigned char
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) prom_get_idprom(char *idbuf, int num_bytes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) /* make a copy of the idprom structure */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) for (i = 0; i < num_bytes; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) idbuf[i] = ((char *)SUN3X_IDPROM)[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) return idbuf[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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