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Diffstat (limited to 'drivers/char/hvc_xen.c')
-rw-r--r--drivers/char/hvc_xen.c271
1 files changed, 0 insertions, 271 deletions
diff --git a/drivers/char/hvc_xen.c b/drivers/char/hvc_xen.c
deleted file mode 100644
index 3740e327f180..000000000000
--- a/drivers/char/hvc_xen.c
+++ /dev/null
@@ -1,271 +0,0 @@
-/*
- * xen console driver interface to hvc_console.c
- *
- * (c) 2007 Gerd Hoffmann <kraxel@suse.de>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#include <linux/console.h>
-#include <linux/delay.h>
-#include <linux/err.h>
-#include <linux/init.h>
-#include <linux/types.h>
-
-#include <asm/xen/hypervisor.h>
-
-#include <xen/xen.h>
-#include <xen/page.h>
-#include <xen/events.h>
-#include <xen/interface/io/console.h>
-#include <xen/hvc-console.h>
-
-#include "hvc_console.h"
-
-#define HVC_COOKIE 0x58656e /* "Xen" in hex */
-
-static struct hvc_struct *hvc;
-static int xencons_irq;
-
-/* ------------------------------------------------------------------ */
-
-static unsigned long console_pfn = ~0ul;
-
-static inline struct xencons_interface *xencons_interface(void)
-{
- if (console_pfn == ~0ul)
- return mfn_to_virt(xen_start_info->console.domU.mfn);
- else
- return __va(console_pfn << PAGE_SHIFT);
-}
-
-static inline void notify_daemon(void)
-{
- /* Use evtchn: this is called early, before irq is set up. */
- notify_remote_via_evtchn(xen_start_info->console.domU.evtchn);
-}
-
-static int __write_console(const char *data, int len)
-{
- struct xencons_interface *intf = xencons_interface();
- XENCONS_RING_IDX cons, prod;
- int sent = 0;
-
- cons = intf->out_cons;
- prod = intf->out_prod;
- mb(); /* update queue values before going on */
- BUG_ON((prod - cons) > sizeof(intf->out));
-
- while ((sent < len) && ((prod - cons) < sizeof(intf->out)))
- intf->out[MASK_XENCONS_IDX(prod++, intf->out)] = data[sent++];
-
- wmb(); /* write ring before updating pointer */
- intf->out_prod = prod;
-
- if (sent)
- notify_daemon();
- return sent;
-}
-
-static int domU_write_console(uint32_t vtermno, const char *data, int len)
-{
- int ret = len;
-
- /*
- * Make sure the whole buffer is emitted, polling if
- * necessary. We don't ever want to rely on the hvc daemon
- * because the most interesting console output is when the
- * kernel is crippled.
- */
- while (len) {
- int sent = __write_console(data, len);
-
- data += sent;
- len -= sent;
-
- if (unlikely(len))
- HYPERVISOR_sched_op(SCHEDOP_yield, NULL);
- }
-
- return ret;
-}
-
-static int domU_read_console(uint32_t vtermno, char *buf, int len)
-{
- struct xencons_interface *intf = xencons_interface();
- XENCONS_RING_IDX cons, prod;
- int recv = 0;
-
- cons = intf->in_cons;
- prod = intf->in_prod;
- mb(); /* get pointers before reading ring */
- BUG_ON((prod - cons) > sizeof(intf->in));
-
- while (cons != prod && recv < len)
- buf[recv++] = intf->in[MASK_XENCONS_IDX(cons++, intf->in)];
-
- mb(); /* read ring before consuming */
- intf->in_cons = cons;
-
- notify_daemon();
- return recv;
-}
-
-static struct hv_ops domU_hvc_ops = {
- .get_chars = domU_read_console,
- .put_chars = domU_write_console,
- .notifier_add = notifier_add_irq,
- .notifier_del = notifier_del_irq,
- .notifier_hangup = notifier_hangup_irq,
-};
-
-static int dom0_read_console(uint32_t vtermno, char *buf, int len)
-{
- return HYPERVISOR_console_io(CONSOLEIO_read, len, buf);
-}
-
-/*
- * Either for a dom0 to write to the system console, or a domU with a
- * debug version of Xen
- */
-static int dom0_write_console(uint32_t vtermno, const char *str, int len)
-{
- int rc = HYPERVISOR_console_io(CONSOLEIO_write, len, (char *)str);
- if (rc < 0)
- return 0;
-
- return len;
-}
-
-static struct hv_ops dom0_hvc_ops = {
- .get_chars = dom0_read_console,
- .put_chars = dom0_write_console,
- .notifier_add = notifier_add_irq,
- .notifier_del = notifier_del_irq,
- .notifier_hangup = notifier_hangup_irq,
-};
-
-static int __init xen_hvc_init(void)
-{
- struct hvc_struct *hp;
- struct hv_ops *ops;
-
- if (!xen_pv_domain())
- return -ENODEV;
-
- if (xen_initial_domain()) {
- ops = &dom0_hvc_ops;
- xencons_irq = bind_virq_to_irq(VIRQ_CONSOLE, 0);
- } else {
- if (!xen_start_info->console.domU.evtchn)
- return -ENODEV;
-
- ops = &domU_hvc_ops;
- xencons_irq = bind_evtchn_to_irq(xen_start_info->console.domU.evtchn);
- }
- if (xencons_irq < 0)
- xencons_irq = 0; /* NO_IRQ */
-
- hp = hvc_alloc(HVC_COOKIE, xencons_irq, ops, 256);
- if (IS_ERR(hp))
- return PTR_ERR(hp);
-
- hvc = hp;
-
- console_pfn = mfn_to_pfn(xen_start_info->console.domU.mfn);
-
- return 0;
-}
-
-void xen_console_resume(void)
-{
- if (xencons_irq)
- rebind_evtchn_irq(xen_start_info->console.domU.evtchn, xencons_irq);
-}
-
-static void __exit xen_hvc_fini(void)
-{
- if (hvc)
- hvc_remove(hvc);
-}
-
-static int xen_cons_init(void)
-{
- struct hv_ops *ops;
-
- if (!xen_pv_domain())
- return 0;
-
- if (xen_initial_domain())
- ops = &dom0_hvc_ops;
- else
- ops = &domU_hvc_ops;
-
- hvc_instantiate(HVC_COOKIE, 0, ops);
- return 0;
-}
-
-module_init(xen_hvc_init);
-module_exit(xen_hvc_fini);
-console_initcall(xen_cons_init);
-
-#ifdef CONFIG_EARLY_PRINTK
-static void xenboot_write_console(struct console *console, const char *string,
- unsigned len)
-{
- unsigned int linelen, off = 0;
- const char *pos;
-
- dom0_write_console(0, string, len);
-
- if (xen_initial_domain())
- return;
-
- domU_write_console(0, "(early) ", 8);
- while (off < len && NULL != (pos = strchr(string+off, '\n'))) {
- linelen = pos-string+off;
- if (off + linelen > len)
- break;
- domU_write_console(0, string+off, linelen);
- domU_write_console(0, "\r\n", 2);
- off += linelen + 1;
- }
- if (off < len)
- domU_write_console(0, string+off, len-off);
-}
-
-struct console xenboot_console = {
- .name = "xenboot",
- .write = xenboot_write_console,
- .flags = CON_PRINTBUFFER | CON_BOOT | CON_ANYTIME,
-};
-#endif /* CONFIG_EARLY_PRINTK */
-
-void xen_raw_console_write(const char *str)
-{
- dom0_write_console(0, str, strlen(str));
-}
-
-void xen_raw_printk(const char *fmt, ...)
-{
- static char buf[512];
- va_list ap;
-
- va_start(ap, fmt);
- vsnprintf(buf, sizeof(buf), fmt, ap);
- va_end(ap);
-
- xen_raw_console_write(buf);
-}
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