Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux

[POWERPC] Celleb: hypervisor console driver

This patch adds hypervisor console driver for Celleb platform.

Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp>
Signed-off-by: Paul Mackerras <paulus@samba.org>

authored by

Ishizaki Kou and committed by
Paul Mackerras
3cdc20e5 d7480a9f

+142
+7
drivers/char/Kconfig
··· 610 610 help 611 611 IBM Console device driver which makes use of RTAS 612 612 613 + config HVC_BEAT 614 + bool "Toshiba's Beat Hypervisor Console support" 615 + depends on PPC_CELLEB 616 + select HVC_DRIVER 617 + help 618 + Toshiba's Cell Reference Set Beat Console device driver 619 + 613 620 config HVCS 614 621 tristate "IBM Hypervisor Virtual Console Server support" 615 622 depends on PPC_PSERIES
+1
drivers/char/Makefile
··· 45 45 obj-$(CONFIG_HVC_CONSOLE) += hvc_vio.o hvsi.o 46 46 obj-$(CONFIG_HVC_ISERIES) += hvc_iseries.o 47 47 obj-$(CONFIG_HVC_RTAS) += hvc_rtas.o 48 + obj-$(CONFIG_HVC_BEAT) += hvc_beat.o 48 49 obj-$(CONFIG_HVC_DRIVER) += hvc_console.o 49 50 obj-$(CONFIG_RAW_DRIVER) += raw.o 50 51 obj-$(CONFIG_SGI_SNSC) += snsc.o snsc_event.o
+134
drivers/char/hvc_beat.c
··· 1 + /* 2 + * Beat hypervisor console driver 3 + * 4 + * (C) Copyright 2006 TOSHIBA CORPORATION 5 + * 6 + * This code is based on drivers/char/hvc_rtas.c: 7 + * (C) Copyright IBM Corporation 2001-2005 8 + * (C) Copyright Red Hat, Inc. 2005 9 + * 10 + * This program is free software; you can redistribute it and/or modify 11 + * it under the terms of the GNU General Public License as published by 12 + * the Free Software Foundation; either version 2 of the License, or 13 + * (at your option) any later version. 14 + * 15 + * This program is distributed in the hope that it will be useful, 16 + * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 + * GNU General Public License for more details. 19 + * 20 + * You should have received a copy of the GNU General Public License along 21 + * with this program; if not, write to the Free Software Foundation, Inc., 22 + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 23 + */ 24 + 25 + #include <linux/module.h> 26 + #include <linux/init.h> 27 + #include <linux/err.h> 28 + #include <linux/string.h> 29 + #include <linux/console.h> 30 + #include <asm/prom.h> 31 + #include <asm/hvconsole.h> 32 + #include <asm/firmware.h> 33 + 34 + #include "hvc_console.h" 35 + 36 + extern int64_t beat_get_term_char(uint64_t, uint64_t *, uint64_t *, uint64_t *); 37 + extern int64_t beat_put_term_char(uint64_t, uint64_t, uint64_t, uint64_t); 38 + 39 + struct hvc_struct *hvc_beat_dev = NULL; 40 + 41 + /* bug: only one queue is available regardless of vtermno */ 42 + static int hvc_beat_get_chars(uint32_t vtermno, char *buf, int cnt) 43 + { 44 + static unsigned char q[sizeof(unsigned long) * 2] 45 + __attribute__((aligned(sizeof(unsigned long)))); 46 + static int qlen = 0; 47 + unsigned long got; 48 + 49 + again: 50 + if (qlen) { 51 + if (qlen > cnt) { 52 + memcpy(buf, q, cnt); 53 + qlen -= cnt; 54 + memmove(q + cnt, q, qlen); 55 + return cnt; 56 + } else { /* qlen <= cnt */ 57 + int r; 58 + 59 + memcpy(buf, q, qlen); 60 + r = qlen; 61 + qlen = 0; 62 + return r; 63 + } 64 + } 65 + if (beat_get_term_char(vtermno, &got, 66 + ((unsigned long *)q), ((unsigned long *)q) + 1) == 0) { 67 + qlen = got; 68 + goto again; 69 + } 70 + return 0; 71 + } 72 + 73 + static int hvc_beat_put_chars(uint32_t vtermno, const char *buf, int cnt) 74 + { 75 + unsigned long kb[2]; 76 + int rest, nlen; 77 + 78 + for (rest = cnt; rest > 0; rest -= nlen) { 79 + nlen = (rest > 16) ? 16 : rest; 80 + memcpy(kb, buf, nlen); 81 + beat_put_term_char(vtermno, rest, kb[0], kb[1]); 82 + rest -= nlen; 83 + } 84 + return cnt; 85 + } 86 + 87 + static struct hv_ops hvc_beat_get_put_ops = { 88 + .get_chars = hvc_beat_get_chars, 89 + .put_chars = hvc_beat_put_chars, 90 + }; 91 + 92 + static int hvc_beat_useit = 1; 93 + 94 + static int hvc_beat_config(char *p) 95 + { 96 + hvc_beat_useit = simple_strtoul(p, NULL, 0); 97 + return 0; 98 + } 99 + 100 + static int hvc_beat_console_init(void) 101 + { 102 + if (hvc_beat_useit && machine_is_compatible("Beat")) { 103 + hvc_instantiate(0, 0, &hvc_beat_get_put_ops); 104 + } 105 + return 0; 106 + } 107 + 108 + /* temp */ 109 + static int hvc_beat_init(void) 110 + { 111 + struct hvc_struct *hp; 112 + 113 + if (!firmware_has_feature(FW_FEATURE_BEAT)) 114 + return -ENODEV; 115 + 116 + hp = hvc_alloc(0, NO_IRQ, &hvc_beat_get_put_ops, 16); 117 + if (IS_ERR(hp)) 118 + return PTR_ERR(hp); 119 + hvc_beat_dev = hp; 120 + return 0; 121 + } 122 + 123 + static void __exit hvc_beat_exit(void) 124 + { 125 + if (hvc_beat_dev) 126 + hvc_remove(hvc_beat_dev); 127 + } 128 + 129 + module_init(hvc_beat_init); 130 + module_exit(hvc_beat_exit); 131 + 132 + __setup("hvc_beat=", hvc_beat_config); 133 + 134 + console_initcall(hvc_beat_console_init);