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ca9bda00b4
The current kernel serializes console resizes but does not serialize the resize against the tty structure updates. This means that while two parallel resizes cannot mess up the console you can get incorrect results reported. Secondly while doing this I added vc_lock_resize() to lock and resize the console. This leaves all knowledge of the console_sem in the vt/console driver and kicks it out of the tty layer, which is good Thirdly while doing this I decided I couldn't stand "disallocate" any longer so I switched it to "deallocate". Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
88 lines
3.0 KiB
C
88 lines
3.0 KiB
C
#ifndef _VT_KERN_H
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#define _VT_KERN_H
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/*
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* this really is an extension of the vc_cons structure in console.c, but
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* with information needed by the vt package
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*/
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#include <linux/vt.h>
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#include <linux/kd.h>
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#include <linux/tty.h>
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#include <linux/console_struct.h>
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#include <linux/mm.h>
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/*
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* Presently, a lot of graphics programs do not restore the contents of
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* the higher font pages. Defining this flag will avoid use of them, but
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* will lose support for PIO_FONTRESET. Note that many font operations are
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* not likely to work with these programs anyway; they need to be
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* fixed. The linux/Documentation directory includes a code snippet
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* to save and restore the text font.
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*/
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#ifdef CONFIG_VGA_CONSOLE
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#define BROKEN_GRAPHICS_PROGRAMS 1
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#endif
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extern void kd_mksound(unsigned int hz, unsigned int ticks);
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extern int kbd_rate(struct kbd_repeat *rep);
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extern int fg_console, last_console, want_console;
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/* console.c */
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int vc_allocate(unsigned int console);
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int vc_cons_allocated(unsigned int console);
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int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines);
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int vc_lock_resize(struct vc_data *vc, unsigned int cols, unsigned int lines);
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void vc_deallocate(unsigned int console);
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void reset_palette(struct vc_data *vc);
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void do_blank_screen(int entering_gfx);
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void do_unblank_screen(int leaving_gfx);
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void unblank_screen(void);
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void poke_blanked_console(void);
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int con_font_op(struct vc_data *vc, struct console_font_op *op);
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int con_set_cmap(unsigned char __user *cmap);
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int con_get_cmap(unsigned char __user *cmap);
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void scrollback(struct vc_data *vc, int lines);
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void scrollfront(struct vc_data *vc, int lines);
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void update_region(struct vc_data *vc, unsigned long start, int count);
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void redraw_screen(struct vc_data *vc, int is_switch);
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#define update_screen(x) redraw_screen(x, 0)
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#define switch_screen(x) redraw_screen(x, 1)
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struct tty_struct;
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int tioclinux(struct tty_struct *tty, unsigned long arg);
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/* consolemap.c */
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struct unimapinit;
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struct unipair;
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int con_set_trans_old(unsigned char __user * table);
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int con_get_trans_old(unsigned char __user * table);
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int con_set_trans_new(unsigned short __user * table);
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int con_get_trans_new(unsigned short __user * table);
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int con_clear_unimap(struct vc_data *vc, struct unimapinit *ui);
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int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list);
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int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct unipair __user *list);
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int con_set_default_unimap(struct vc_data *vc);
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void con_free_unimap(struct vc_data *vc);
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void con_protect_unimap(struct vc_data *vc, int rdonly);
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int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc);
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/* vt.c */
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int vt_waitactive(int vt);
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void change_console(struct vc_data *new_vc);
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void reset_vc(struct vc_data *vc);
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/*
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* vc_screen.c shares this temporary buffer with the console write code so that
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* we can easily avoid touching user space while holding the console spinlock.
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*/
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#define CON_BUF_SIZE (CONFIG_BASE_SMALL ? 256 : PAGE_SIZE)
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extern char con_buf[CON_BUF_SIZE];
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extern struct semaphore con_buf_sem;
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#endif /* _VT_KERN_H */
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