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author | 2005-11-23 17:57:25 +1100 | |
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committer | 2006-01-09 14:49:54 +1100 | |
commit | 51d3082fe6e55aecfa17113dbe98077c749f724c (patch) | |
tree | 9a1e2355d5988d8cc1ca511d53c1bb24b0baa17f /arch/powerpc/xmon | |
parent | [PATCH] powerpc: serial port discovery (#2) (diff) | |
download | linux-51d3082fe6e55aecfa17113dbe98077c749f724c.tar.gz linux-51d3082fe6e55aecfa17113dbe98077c749f724c.tar.bz2 linux-51d3082fe6e55aecfa17113dbe98077c749f724c.zip |
[PATCH] powerpc: Unify udbg (#2)
This patch unifies udbg for both ppc32 and ppc64 when building the
merged achitecture. xmon now has a single "back end". The powermac udbg
stuff gets enriched with some ADB capabilities and btext output. In
addition, the early_init callback is now called on ppc32 as well,
approx. in the same order as ppc64 regarding device-tree manipulations.
The init sequences of ppc32 and ppc64 are getting closer, I'll unify
them in a later patch.
For now, you can force udbg to the scc using "sccdbg" or to btext using
"btextdbg" on powermacs. I'll implement a cleaner way of forcing udbg
output to something else than the autodetected OF output device in a
later patch.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/xmon')
-rw-r--r-- | arch/powerpc/xmon/Makefile | 8 | ||||
-rw-r--r-- | arch/powerpc/xmon/start.c (renamed from arch/powerpc/xmon/start_64.c) | 0 | ||||
-rw-r--r-- | arch/powerpc/xmon/start_32.c | 441 | ||||
-rw-r--r-- | arch/powerpc/xmon/start_8xx.c | 44 |
4 files changed, 2 insertions, 491 deletions
diff --git a/arch/powerpc/xmon/Makefile b/arch/powerpc/xmon/Makefile index b20312e5ed27..109d874ecfbe 100644 --- a/arch/powerpc/xmon/Makefile +++ b/arch/powerpc/xmon/Makefile @@ -3,9 +3,5 @@ ifdef CONFIG_PPC64 EXTRA_CFLAGS += -mno-minimal-toc endif - -obj-$(CONFIG_8xx) += start_8xx.o -obj-$(CONFIG_6xx) += start_32.o -obj-$(CONFIG_4xx) += start_32.o -obj-$(CONFIG_PPC64) += start_64.o -obj-y += xmon.o ppc-dis.o ppc-opc.o setjmp.o nonstdio.o +obj-y += xmon.o ppc-dis.o ppc-opc.o setjmp.o start.o \ + nonstdio.o diff --git a/arch/powerpc/xmon/start_64.c b/arch/powerpc/xmon/start.c index 712552c4f242..712552c4f242 100644 --- a/arch/powerpc/xmon/start_64.c +++ b/arch/powerpc/xmon/start.c diff --git a/arch/powerpc/xmon/start_32.c b/arch/powerpc/xmon/start_32.c deleted file mode 100644 index c2464df4217e..000000000000 --- a/arch/powerpc/xmon/start_32.c +++ /dev/null @@ -1,441 +0,0 @@ -/* - * Copyright (C) 1996 Paul Mackerras. - */ -#include <linux/config.h> -#include <linux/string.h> -#include <asm/machdep.h> -#include <asm/io.h> -#include <asm/page.h> -#include <linux/adb.h> -#include <linux/pmu.h> -#include <linux/cuda.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/bitops.h> -#include <asm/xmon.h> -#include <asm/prom.h> -#include <asm/bootx.h> -#include <asm/machdep.h> -#include <asm/errno.h> -#include <asm/pmac_feature.h> -#include <asm/processor.h> -#include <asm/delay.h> -#include <asm/btext.h> -#include <asm/time.h> -#include "nonstdio.h" - -static volatile unsigned char __iomem *sccc, *sccd; -unsigned int TXRDY, RXRDY, DLAB; - -static int use_serial; -static int use_screen; -static int via_modem; -static int xmon_use_sccb; -static struct device_node *channel_node; - -void buf_access(void) -{ - if (DLAB) - sccd[3] &= ~DLAB; /* reset DLAB */ -} - -extern int adb_init(void); - -#ifdef CONFIG_PPC_CHRP -/* - * This looks in the "ranges" property for the primary PCI host bridge - * to find the physical address of the start of PCI/ISA I/O space. - * It is basically a cut-down version of pci_process_bridge_OF_ranges. - */ -static unsigned long chrp_find_phys_io_base(void) -{ - struct device_node *node; - unsigned int *ranges; - unsigned long base = CHRP_ISA_IO_BASE; - int rlen = 0; - int np; - - node = find_devices("isa"); - if (node != NULL) { - node = node->parent; - if (node == NULL || node->type == NULL - || strcmp(node->type, "pci") != 0) - node = NULL; - } - if (node == NULL) - node = find_devices("pci"); - if (node == NULL) - return base; - - ranges = (unsigned int *) get_property(node, "ranges", &rlen); - np = prom_n_addr_cells(node) + 5; - while ((rlen -= np * sizeof(unsigned int)) >= 0) { - if ((ranges[0] >> 24) == 1 && ranges[2] == 0) { - /* I/O space starting at 0, grab the phys base */ - base = ranges[np - 3]; - break; - } - ranges += np; - } - return base; -} -#endif /* CONFIG_PPC_CHRP */ - -void xmon_map_scc(void) -{ -#ifdef CONFIG_PPC_MULTIPLATFORM - volatile unsigned char __iomem *base; - - if (_machine == _MACH_Pmac) { - struct device_node *np; - unsigned long addr; -#ifdef CONFIG_BOOTX_TEXT - if (!use_screen && !use_serial - && !machine_is_compatible("iMac")) { - /* see if there is a keyboard in the device tree - with a parent of type "adb" */ - for (np = find_devices("keyboard"); np; np = np->next) - if (np->parent && np->parent->type - && strcmp(np->parent->type, "adb") == 0) - break; - - /* needs to be hacked if xmon_printk is to be used - from within find_via_pmu() */ -#ifdef CONFIG_ADB_PMU - if (np != NULL && boot_text_mapped && find_via_pmu()) - use_screen = 1; -#endif -#ifdef CONFIG_ADB_CUDA - if (np != NULL && boot_text_mapped && find_via_cuda()) - use_screen = 1; -#endif - } - if (!use_screen && (np = find_devices("escc")) != NULL) { - /* - * look for the device node for the serial port - * we're using and see if it says it has a modem - */ - char *name = xmon_use_sccb? "ch-b": "ch-a"; - char *slots; - int l; - - np = np->child; - while (np != NULL && strcmp(np->name, name) != 0) - np = np->sibling; - if (np != NULL) { - /* XXX should parse this properly */ - channel_node = np; - slots = get_property(np, "slot-names", &l); - if (slots != NULL && l >= 10 - && strcmp(slots+4, "Modem") == 0) - via_modem = 1; - } - } - btext_drawstring("xmon uses "); - if (use_screen) - btext_drawstring("screen and keyboard\n"); - else { - if (via_modem) - btext_drawstring("modem on "); - btext_drawstring(xmon_use_sccb? "printer": "modem"); - btext_drawstring(" port\n"); - } - -#endif /* CONFIG_BOOTX_TEXT */ - -#ifdef CHRP_ESCC - addr = 0xc1013020; -#else - addr = 0xf3013020; -#endif - TXRDY = 4; - RXRDY = 1; - - np = find_devices("mac-io"); - if (np && np->n_addrs) - addr = np->addrs[0].address + 0x13020; - base = (volatile unsigned char *) ioremap(addr & PAGE_MASK, PAGE_SIZE); - sccc = base + (addr & ~PAGE_MASK); - sccd = sccc + 0x10; - - } else { - base = (volatile unsigned char *) isa_io_base; - -#ifdef CONFIG_PPC_CHRP - if (_machine == _MACH_chrp) - base = (volatile unsigned char __iomem *) - ioremap(chrp_find_phys_io_base(), 0x1000); -#endif - - sccc = base + 0x3fd; - sccd = base + 0x3f8; - if (xmon_use_sccb) { - sccc -= 0x100; - sccd -= 0x100; - } - TXRDY = 0x20; - RXRDY = 1; - DLAB = 0x80; - } -#elif defined(CONFIG_GEMINI) - /* should already be mapped by the kernel boot */ - sccc = (volatile unsigned char __iomem *) 0xffeffb0d; - sccd = (volatile unsigned char __iomem *) 0xffeffb08; - TXRDY = 0x20; - RXRDY = 1; - DLAB = 0x80; -#elif defined(CONFIG_405GP) - sccc = (volatile unsigned char __iomem *)0xef600305; - sccd = (volatile unsigned char __iomem *)0xef600300; - TXRDY = 0x20; - RXRDY = 1; - DLAB = 0x80; -#endif /* platform */ -} - -static int scc_initialized = 0; - -void xmon_init_scc(void); -extern void cuda_poll(void); - -static inline void do_poll_adb(void) -{ -#ifdef CONFIG_ADB_PMU - if (sys_ctrler == SYS_CTRLER_PMU) - pmu_poll_adb(); -#endif /* CONFIG_ADB_PMU */ -#ifdef CONFIG_ADB_CUDA - if (sys_ctrler == SYS_CTRLER_CUDA) - cuda_poll(); -#endif /* CONFIG_ADB_CUDA */ -} - -int xmon_write(void *ptr, int nb) -{ - char *p = ptr; - int i, c, ct; - -#ifdef CONFIG_SMP - static unsigned long xmon_write_lock; - int lock_wait = 1000000; - int locked; - - while ((locked = test_and_set_bit(0, &xmon_write_lock)) != 0) - if (--lock_wait == 0) - break; -#endif - -#ifdef CONFIG_BOOTX_TEXT - if (use_screen) { - /* write it on the screen */ - for (i = 0; i < nb; ++i) - btext_drawchar(*p++); - goto out; - } -#endif - if (!scc_initialized) - xmon_init_scc(); - ct = 0; - for (i = 0; i < nb; ++i) { - while ((*sccc & TXRDY) == 0) - do_poll_adb(); - c = p[i]; - if (c == '\n' && !ct) { - c = '\r'; - ct = 1; - --i; - } else { - ct = 0; - } - buf_access(); - *sccd = c; - eieio(); - } - - out: -#ifdef CONFIG_SMP - if (!locked) - clear_bit(0, &xmon_write_lock); -#endif - return nb; -} - -int xmon_wants_key; -int xmon_adb_keycode; - -#ifdef CONFIG_BOOTX_TEXT -static int xmon_adb_shiftstate; - -static unsigned char xmon_keytab[128] = - "asdfhgzxcv\000bqwer" /* 0x00 - 0x0f */ - "yt123465=97-80]o" /* 0x10 - 0x1f */ - "u[ip\rlj'k;\\,/nm." /* 0x20 - 0x2f */ - "\t `\177\0\033\0\0\0\0\0\0\0\0\0\0" /* 0x30 - 0x3f */ - "\0.\0*\0+\0\0\0\0\0/\r\0-\0" /* 0x40 - 0x4f */ - "\0\0000123456789\0\0\0"; /* 0x50 - 0x5f */ - -static unsigned char xmon_shift_keytab[128] = - "ASDFHGZXCV\000BQWER" /* 0x00 - 0x0f */ - "YT!@#$^%+(&_*)}O" /* 0x10 - 0x1f */ - "U{IP\rLJ\"K:|<?NM>" /* 0x20 - 0x2f */ - "\t ~\177\0\033\0\0\0\0\0\0\0\0\0\0" /* 0x30 - 0x3f */ - "\0.\0*\0+\0\0\0\0\0/\r\0-\0" /* 0x40 - 0x4f */ - "\0\0000123456789\0\0\0"; /* 0x50 - 0x5f */ - -static int xmon_get_adb_key(void) -{ - int k, t, on; - - xmon_wants_key = 1; - for (;;) { - xmon_adb_keycode = -1; - t = 0; - on = 0; - do { - if (--t < 0) { - on = 1 - on; - btext_drawchar(on? 0xdb: 0x20); - btext_drawchar('\b'); - t = 200000; - } - do_poll_adb(); - } while (xmon_adb_keycode == -1); - k = xmon_adb_keycode; - if (on) - btext_drawstring(" \b"); - - /* test for shift keys */ - if ((k & 0x7f) == 0x38 || (k & 0x7f) == 0x7b) { - xmon_adb_shiftstate = (k & 0x80) == 0; - continue; - } - if (k >= 0x80) - continue; /* ignore up transitions */ - k = (xmon_adb_shiftstate? xmon_shift_keytab: xmon_keytab)[k]; - if (k != 0) - break; - } - xmon_wants_key = 0; - return k; -} -#endif /* CONFIG_BOOTX_TEXT */ - -int xmon_readchar(void) -{ -#ifdef CONFIG_BOOTX_TEXT - if (use_screen) - return xmon_get_adb_key(); -#endif - if (!scc_initialized) - xmon_init_scc(); - while ((*sccc & RXRDY) == 0) - do_poll_adb(); - buf_access(); - return *sccd; -} - -int xmon_read_poll(void) -{ - if ((*sccc & RXRDY) == 0) { - do_poll_adb(); - return -1; - } - buf_access(); - return *sccd; -} - -static unsigned char scc_inittab[] = { - 13, 0, /* set baud rate divisor */ - 12, 1, - 14, 1, /* baud rate gen enable, src=rtxc */ - 11, 0x50, /* clocks = br gen */ - 5, 0xea, /* tx 8 bits, assert DTR & RTS */ - 4, 0x46, /* x16 clock, 1 stop */ - 3, 0xc1, /* rx enable, 8 bits */ -}; - -void xmon_init_scc(void) -{ - if ( _machine == _MACH_chrp ) - { - sccd[3] = 0x83; eieio(); /* LCR = 8N1 + DLAB */ - sccd[0] = 12; eieio(); /* DLL = 9600 baud */ - sccd[1] = 0; eieio(); - sccd[2] = 0; eieio(); /* FCR = 0 */ - sccd[3] = 3; eieio(); /* LCR = 8N1 */ - sccd[1] = 0; eieio(); /* IER = 0 */ - } - else if ( _machine == _MACH_Pmac ) - { - int i, x; - unsigned long timeout; - - if (channel_node != 0) - pmac_call_feature( - PMAC_FTR_SCC_ENABLE, - channel_node, - PMAC_SCC_ASYNC | PMAC_SCC_FLAG_XMON, 1); - printk(KERN_INFO "Serial port locked ON by debugger !\n"); - if (via_modem && channel_node != 0) { - unsigned int t0; - - pmac_call_feature( - PMAC_FTR_MODEM_ENABLE, - channel_node, 0, 1); - printk(KERN_INFO "Modem powered up by debugger !\n"); - t0 = get_tbl(); - timeout = 3 * tb_ticks_per_sec; - if (timeout == 0) - /* assume 25MHz if tb_ticks_per_sec not set */ - timeout = 75000000; - while (get_tbl() - t0 < timeout) - eieio(); - } - /* use the B channel if requested */ - if (xmon_use_sccb) { - sccc = (volatile unsigned char *) - ((unsigned long)sccc & ~0x20); - sccd = sccc + 0x10; - } - for (i = 20000; i != 0; --i) { - x = *sccc; eieio(); - } - *sccc = 9; eieio(); /* reset A or B side */ - *sccc = ((unsigned long)sccc & 0x20)? 0x80: 0x40; eieio(); - for (i = 0; i < sizeof(scc_inittab); ++i) { - *sccc = scc_inittab[i]; - eieio(); - } - } - scc_initialized = 1; - if (via_modem) { - for (;;) { - xmon_write("ATE1V1\r", 7); - if (xmon_expect("OK", 5)) { - xmon_write("ATA\r", 4); - if (xmon_expect("CONNECT", 40)) - break; - } - xmon_write("+++", 3); - xmon_expect("OK", 3); - } - } -} - -void xmon_enter(void) -{ -#ifdef CONFIG_ADB_PMU - if (_machine == _MACH_Pmac) { - pmu_suspend(); - } -#endif -} - -void xmon_leave(void) -{ -#ifdef CONFIG_ADB_PMU - if (_machine == _MACH_Pmac) { - pmu_resume(); - } -#endif -} diff --git a/arch/powerpc/xmon/start_8xx.c b/arch/powerpc/xmon/start_8xx.c deleted file mode 100644 index 4c17b0486ad5..000000000000 --- a/arch/powerpc/xmon/start_8xx.c +++ /dev/null @@ -1,44 +0,0 @@ -/* - * Copyright (C) 1996 Paul Mackerras. - * Copyright (C) 2000 Dan Malek. - * Quick hack of Paul's code to make XMON work on 8xx processors. Lots - * of assumptions, like the SMC1 is used, it has been initialized by the - * loader at some point, and we can just stuff and suck bytes. - * We rely upon the 8xx uart driver to support us, as the interface - * changes between boot up and operational phases of the kernel. - */ -#include <linux/string.h> -#include <asm/machdep.h> -#include <asm/io.h> -#include <asm/page.h> -#include <linux/kernel.h> -#include <asm/8xx_immap.h> -#include <asm/mpc8xx.h> -#include <asm/commproc.h> -#include "nonstdio.h" - -extern int xmon_8xx_write(char *str, int nb); -extern int xmon_8xx_read_poll(void); -extern int xmon_8xx_read_char(void); - -void xmon_map_scc(void) -{ - cpmp = (cpm8xx_t *)&(((immap_t *)IMAP_ADDR)->im_cpm); -} - -void xmon_init_scc(void); - -int xmon_write(void *ptr, int nb) -{ - return(xmon_8xx_write(ptr, nb)); -} - -int xmon_readchar(void) -{ - return xmon_8xx_read_char(); -} - -int xmon_read_poll(void) -{ - return(xmon_8xx_read_poll()); -} |