lkml.org 
[lkml]   [2010]   [Aug]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    Subject[PATCH 1/2] x86, setup: reorgize the early_console_setup

    Seperate early_console_setup from tty.c
    also make main.c to include printf.c/string.c/cmdline.c

    will reuse early_serial_console.c/string.c/printf.c/cmdline.c in compressed/misc.c

    Signed-off-by: Yinghai Lu <yinghai@kernel.org>

    ---
    arch/x86/boot/Makefile | 4
    arch/x86/boot/boot.h | 16 ---
    arch/x86/boot/cmdline.c | 8 -
    arch/x86/boot/early_serial_console.c | 139 ++++++++++++++++++++++++++++++++++
    arch/x86/boot/main.c | 14 +++
    arch/x86/boot/printf.c | 6 -
    arch/x86/boot/string.c | 16 +++
    arch/x86/boot/tty.c | 141 -----------------------------------
    8 files changed, 175 insertions(+), 169 deletions(-)

    Index: linux-2.6/arch/x86/boot/tty.c
    ===================================================================
    --- linux-2.6.orig/arch/x86/boot/tty.c
    +++ linux-2.6/arch/x86/boot/tty.c
    @@ -15,27 +15,7 @@

    #include "boot.h"

    -#define DEFAULT_SERIAL_PORT 0x3f8 /* ttyS0 */
    -
    -static int early_serial_base;
    -
    -#define XMTRDY 0x20
    -
    -#define DLAB 0x80
    -
    -#define TXR 0 /* Transmit register (WRITE) */
    -#define RXR 0 /* Receive register (READ) */
    -#define IER 1 /* Interrupt Enable */
    -#define IIR 2 /* Interrupt ID */
    -#define FCR 2 /* FIFO control */
    -#define LCR 3 /* Line control */
    -#define MCR 4 /* Modem control */
    -#define LSR 5 /* Line Status */
    -#define MSR 6 /* Modem Status */
    -#define DLL 0 /* Divisor Latch Low */
    -#define DLH 1 /* Divisor latch High */
    -
    -#define DEFAULT_BAUD 9600
    +#include "early_serial_console.c"

    /*
    * These functions are in .inittext so they can be used to signal
    @@ -152,122 +132,3 @@ int getchar_timeout(void)
    return 0; /* Timeout! */
    }

    -static void early_serial_init(int port, int baud)
    -{
    - unsigned char c;
    - unsigned divisor;
    -
    - outb(0x3, port + LCR); /* 8n1 */
    - outb(0, port + IER); /* no interrupt */
    - outb(0, port + FCR); /* no fifo */
    - outb(0x3, port + MCR); /* DTR + RTS */
    -
    - divisor = 115200 / baud;
    - c = inb(port + LCR);
    - outb(c | DLAB, port + LCR);
    - outb(divisor & 0xff, port + DLL);
    - outb((divisor >> 8) & 0xff, port + DLH);
    - outb(c & ~DLAB, port + LCR);
    -
    - early_serial_base = port;
    -
    - printf("Early serial console at I/O port 0x%x baud: %d\n", port, baud);
    -}
    -
    -static void parse_earlyprintk(void)
    -{
    - int baud = DEFAULT_BAUD;
    - char arg[32];
    - int pos = 0;
    - int port = 0;
    -
    - if (cmdline_find_option("earlyprintk", arg, sizeof arg) > 0) {
    - char *e;
    -
    - if (!strncmp(arg, "serial", 6)) {
    - port = DEFAULT_SERIAL_PORT;
    - pos += 6;
    - }
    -
    - if (arg[pos] == ',')
    - pos++;
    -
    - if (!strncmp(arg, "ttyS", 4)) {
    - static const int bases[] = { 0x3f8, 0x2f8 };
    - int idx = 0;
    -
    - if (!strncmp(arg + pos, "ttyS", 4))
    - pos += 4;
    -
    - if (arg[pos++] == '1')
    - idx = 1;
    -
    - port = bases[idx];
    - }
    -
    - if (arg[pos] == ',')
    - pos++;
    -
    - baud = simple_strtoull(arg + pos, &e, 0);
    - if (baud == 0 || arg + pos == e)
    - baud = DEFAULT_BAUD;
    - }
    -
    - if (port)
    - early_serial_init(port, baud);
    -}
    -
    -#define BASE_BAUD (1843200/16)
    -static unsigned int probe_baud(int port)
    -{
    - unsigned char lcr, dll, dlh;
    - unsigned int quot;
    -
    - lcr = inb(port + LCR);
    - outb(lcr | DLAB, port + LCR);
    - dll = inb(port + DLL);
    - dlh = inb(port + DLH);
    - outb(lcr, port + LCR);
    - quot = (dlh << 8) | dll;
    -
    - return BASE_BAUD / quot;
    -}
    -
    -static void parse_console_uart8250(void)
    -{
    - char optstr[64], *options;
    - int baud = DEFAULT_BAUD;
    - int port = 0;
    -
    - /*
    - * console=uart8250,io,0x3f8,115200n8
    - * need to make sure it is last one console !
    - */
    - if (cmdline_find_option("console", optstr, sizeof optstr) <= 0)
    - return;
    -
    - options = optstr;
    -
    - if (!strncmp(options, "uart8250,io,", 12))
    - port = simple_strtoull(options + 12, &options, 0);
    - else if (!strncmp(options, "uart,io,", 8))
    - port = simple_strtoull(options + 8, &options, 0);
    - else
    - return;
    -
    - if (options && (options[0] == ','))
    - baud = simple_strtoull(options + 1, &options, 0);
    - else
    - baud = probe_baud(port);
    -
    - if (port)
    - early_serial_init(port, baud);
    -}
    -
    -void console_init(void)
    -{
    - parse_earlyprintk();
    -
    - if (!early_serial_base)
    - parse_console_uart8250();
    -}
    Index: linux-2.6/arch/x86/boot/early_serial_console.c
    ===================================================================
    --- /dev/null
    +++ linux-2.6/arch/x86/boot/early_serial_console.c
    @@ -0,0 +1,139 @@
    +static int early_serial_base;
    +
    +#define DEFAULT_SERIAL_PORT 0x3f8 /* ttyS0 */
    +
    +#define XMTRDY 0x20
    +
    +#define DLAB 0x80
    +
    +#define TXR 0 /* Transmit register (WRITE) */
    +#define RXR 0 /* Receive register (READ) */
    +#define IER 1 /* Interrupt Enable */
    +#define IIR 2 /* Interrupt ID */
    +#define FCR 2 /* FIFO control */
    +#define LCR 3 /* Line control */
    +#define MCR 4 /* Modem control */
    +#define LSR 5 /* Line Status */
    +#define MSR 6 /* Modem Status */
    +#define DLL 0 /* Divisor Latch Low */
    +#define DLH 1 /* Divisor latch High */
    +
    +#define DEFAULT_BAUD 9600
    +
    +static void early_serial_init(int port, int baud)
    +{
    + unsigned char c;
    + unsigned divisor;
    +
    + outb(0x3, port + LCR); /* 8n1 */
    + outb(0, port + IER); /* no interrupt */
    + outb(0, port + FCR); /* no fifo */
    + outb(0x3, port + MCR); /* DTR + RTS */
    +
    + divisor = 115200 / baud;
    + c = inb(port + LCR);
    + outb(c | DLAB, port + LCR);
    + outb(divisor & 0xff, port + DLL);
    + outb((divisor >> 8) & 0xff, port + DLH);
    + outb(c & ~DLAB, port + LCR);
    +
    + early_serial_base = port;
    +}
    +
    +static void parse_earlyprintk(void)
    +{
    + int baud = DEFAULT_BAUD;
    + char arg[32];
    + int pos = 0;
    + int port = 0;
    +
    + if (cmdline_find_option("earlyprintk", arg, sizeof arg) > 0) {
    + char *e;
    +
    + if (!strncmp(arg, "serial", 6)) {
    + port = DEFAULT_SERIAL_PORT;
    + pos += 6;
    + }
    +
    + if (arg[pos] == ',')
    + pos++;
    +
    + if (!strncmp(arg, "ttyS", 4)) {
    + static const int bases[] = { 0x3f8, 0x2f8 };
    + int idx = 0;
    +
    + if (!strncmp(arg + pos, "ttyS", 4))
    + pos += 4;
    +
    + if (arg[pos++] == '1')
    + idx = 1;
    +
    + port = bases[idx];
    + }
    +
    + if (arg[pos] == ',')
    + pos++;
    +
    + baud = simple_strtoull(arg + pos, &e, 0);
    + if (baud == 0 || arg + pos == e)
    + baud = DEFAULT_BAUD;
    + }
    +
    + if (port)
    + early_serial_init(port, baud);
    +}
    +
    +#define BASE_BAUD (1843200/16)
    +static unsigned int probe_baud(int port)
    +{
    + unsigned char lcr, dll, dlh;
    + unsigned int quot;
    +
    + lcr = inb(port + LCR);
    + outb(lcr | DLAB, port + LCR);
    + dll = inb(port + DLL);
    + dlh = inb(port + DLH);
    + outb(lcr, port + LCR);
    + quot = (dlh << 8) | dll;
    +
    + return BASE_BAUD / quot;
    +}
    +
    +static void parse_console_uart8250(void)
    +{
    + char optstr[64], *options;
    + int baud = DEFAULT_BAUD;
    + int port = 0;
    +
    + /*
    + * console=uart8250,io,0x3f8,115200n8
    + * need to make sure it is last one console !
    + */
    + if (cmdline_find_option("console", optstr, sizeof optstr) <= 0)
    + return;
    +
    + options = optstr;
    +
    + if (!strncmp(options, "uart8250,io,", 12))
    + port = simple_strtoull(options + 12, &options, 0);
    + else if (!strncmp(options, "uart,io,", 8))
    + port = simple_strtoull(options + 8, &options, 0);
    + else
    + return;
    +
    + if (options && (options[0] == ','))
    + baud = simple_strtoull(options + 1, &options, 0);
    + else
    + baud = probe_baud(port);
    +
    + if (port)
    + early_serial_init(port, baud);
    +}
    +
    +void console_init(void)
    +{
    + parse_earlyprintk();
    +
    + if (!early_serial_base)
    + parse_console_uart8250();
    +}
    Index: linux-2.6/arch/x86/boot/Makefile
    ===================================================================
    --- linux-2.6.orig/arch/x86/boot/Makefile
    +++ linux-2.6/arch/x86/boot/Makefile
    @@ -26,9 +26,9 @@ targets := vmlinux.bin setup.bin setup.
    targets += fdimage fdimage144 fdimage288 image.iso mtools.conf
    subdir- := compressed

    -setup-y += a20.o bioscall.o cmdline.o copy.o cpu.o cpucheck.o edd.o
    +setup-y += a20.o bioscall.o copy.o cpu.o cpucheck.o edd.o
    setup-y += header.o main.o mca.o memory.o pm.o pmjump.o
    -setup-y += printf.o regs.o string.o tty.o video.o video-mode.o
    +setup-y += regs.o tty.o video.o video-mode.o
    setup-y += version.o
    setup-$(CONFIG_X86_APM_BOOT) += apm.o

    Index: linux-2.6/arch/x86/boot/printf.c
    ===================================================================
    --- linux-2.6.orig/arch/x86/boot/printf.c
    +++ linux-2.6/arch/x86/boot/printf.c
    @@ -15,8 +15,6 @@
    *
    */

    -#include "boot.h"
    -
    static int skip_atoi(const char **s)
    {
    int i = 0;
    @@ -34,7 +32,7 @@ static int skip_atoi(const char **s)
    #define SMALL 32 /* Must be 32 == 0x20 */
    #define SPECIAL 64 /* 0x */

    -#define do_div(n,base) ({ \
    +#define __do_div(n,base) ({ \
    int __res; \
    __res = ((unsigned long) n) % (unsigned) base; \
    n = ((unsigned long) n) / (unsigned) base; \
    @@ -83,7 +81,7 @@ static char *number(char *str, long num,
    tmp[i++] = '0';
    else
    while (num != 0)
    - tmp[i++] = (digits[do_div(num, base)] | locase);
    + tmp[i++] = (digits[__do_div(num, base)] | locase);
    if (i > precision)
    precision = i;
    size -= precision;
    Index: linux-2.6/arch/x86/boot/string.c
    ===================================================================
    --- linux-2.6.orig/arch/x86/boot/string.c
    +++ linux-2.6/arch/x86/boot/string.c
    @@ -12,7 +12,21 @@
    * Very basic string functions
    */

    -#include "boot.h"
    +static inline int isdigit(int ch)
    +{
    + return (ch >= '0') && (ch <= '9');
    +}
    +
    +static inline int isxdigit(int ch)
    +{
    + if (isdigit(ch))
    + return true;
    +
    + if ((ch >= 'a') && (ch <= 'f'))
    + return true;
    +
    + return (ch >= 'A') && (ch <= 'F');
    +}

    int strcmp(const char *str1, const char *str2)
    {
    Index: linux-2.6/arch/x86/boot/boot.h
    ===================================================================
    --- linux-2.6.orig/arch/x86/boot/boot.h
    +++ linux-2.6/arch/x86/boot/boot.h
    @@ -200,22 +200,6 @@ static inline int memcmp_gs(const void *
    return diff;
    }

    -static inline int isdigit(int ch)
    -{
    - return (ch >= '0') && (ch <= '9');
    -}
    -
    -static inline int isxdigit(int ch)
    -{
    - if (isdigit(ch))
    - return true;
    -
    - if ((ch >= 'a') && (ch <= 'f'))
    - return true;
    -
    - return (ch >= 'A') && (ch <= 'F');
    -}
    -
    /* Heap -- available for dynamic lists. */
    extern char _end[];
    extern char *HEAP;
    Index: linux-2.6/arch/x86/boot/cmdline.c
    ===================================================================
    --- linux-2.6.orig/arch/x86/boot/cmdline.c
    +++ linux-2.6/arch/x86/boot/cmdline.c
    @@ -12,8 +12,6 @@
    * Simple command-line parser for early boot.
    */

    -#include "boot.h"
    -
    static inline int myisspace(u8 c)
    {
    return c <= ' '; /* Close enough approximation */
    @@ -27,9 +25,8 @@ static inline int myisspace(u8 c)
    * Returns the length of the argument (regardless of if it was
    * truncated to fit in the buffer), or -1 on not found.
    */
    -int cmdline_find_option(const char *option, char *buffer, int bufsize)
    +static int __cmdline_find_option(u32 cmdline_ptr, const char *option, char *buffer, int bufsize)
    {
    - u32 cmdline_ptr = boot_params.hdr.cmd_line_ptr;
    addr_t cptr;
    char c;
    int len = -1;
    @@ -100,9 +97,8 @@ int cmdline_find_option(const char *opti
    * Returns the position of that option (starts counting with 1)
    * or 0 on not found
    */
    -int cmdline_find_option_bool(const char *option)
    +static int __cmdline_find_option_bool(u32 cmdline_ptr, const char *option)
    {
    - u32 cmdline_ptr = boot_params.hdr.cmd_line_ptr;
    addr_t cptr;
    char c;
    int pos = 0, wstart = 0;
    Index: linux-2.6/arch/x86/boot/main.c
    ===================================================================
    --- linux-2.6.orig/arch/x86/boot/main.c
    +++ linux-2.6/arch/x86/boot/main.c
    @@ -15,6 +15,20 @@

    #include "boot.h"

    +#include "string.c"
    +#include "printf.c"
    +
    +#include "cmdline.c"
    +int cmdline_find_option(const char *option, char *buffer, int bufsize)
    +{
    + return __cmdline_find_option(boot_params.hdr.cmd_line_ptr, option, buffer, bufsize);
    +}
    +
    +int cmdline_find_option_bool(const char *option)
    +{
    + return __cmdline_find_option_bool(boot_params.hdr.cmd_line_ptr, option);
    +}
    +
    struct boot_params boot_params __attribute__((aligned(16)));

    char *HEAP = _end;

    \
     
     \ /
      Last update: 2010-08-02 09:17    [W:0.043 / U:0.468 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site