510 lines
13 KiB
C
510 lines
13 KiB
C
#define HAVE_STRING_SUPPORT 1
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#define HAVE_CAST_SUPPORT 1
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#define HAVE_STATIC_ARRAY_SUPPORT 1
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#define HAVE_POINTER_SUPPORT 1
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#define HAVE_CONSTANT_PROPOGATION 0
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#define CALCULATE_DRB_REG 1
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void outb(unsigned char value, unsigned short port)
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{
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__builtin_outb(value, port);
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}
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void outw(unsigned short value, unsigned short port)
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{
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__builtin_outw(value, port);
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}
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void outl(unsigned int value, unsigned short port)
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{
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__builtin_outl(value, port);
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}
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unsigned char inb(unsigned short port)
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{
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return __builtin_inb(port);
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}
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unsigned char inw(unsigned short port)
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{
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return __builtin_inw(port);
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}
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unsigned char inl(unsigned short port)
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{
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return __builtin_inl(port);
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}
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static unsigned int config_cmd(unsigned char bus, unsigned devfn, unsigned where)
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{
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return 0x80000000 | (bus << 16) | (devfn << 8) | (where & ~3);
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}
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static unsigned char pcibios_read_config_byte(
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unsigned char bus, unsigned devfn, unsigned where)
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{
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outl(config_cmd(bus, devfn, where), 0xCF8);
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return inb(0xCFC + (where & 3));
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}
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static unsigned short pcibios_read_config_word(
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unsigned char bus, unsigned devfn, unsigned where)
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{
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outl(config_cmd(bus, devfn, where), 0xCF8);
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return inw(0xCFC + (where & 2));
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}
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static unsigned int pcibios_read_config_dword(
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unsigned char bus, unsigned devfn, unsigned where)
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{
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outl(config_cmd(bus, devfn, where), 0xCF8);
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return inl(0xCFC);
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}
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static void pcibios_write_config_byte(
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unsigned char bus, unsigned devfn, unsigned where, unsigned char value)
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{
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outl(config_cmd(bus, devfn, where), 0xCF8);
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outb(value, 0xCFC + (where & 3));
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}
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static void pcibios_write_config_word(
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unsigned char bus, unsigned devfn, unsigned where, unsigned short value)
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{
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outl(config_cmd(bus, devfn, where), 0xCF8);
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outw(value, 0xCFC + (where & 2));
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}
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static void pcibios_write_config_dword(
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unsigned char bus, unsigned devfn, unsigned where, unsigned int value)
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{
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outl(config_cmd(bus, devfn, where), 0xCF8);
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outl(value, 0xCFC);
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}
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int log2(int value)
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{
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/* __builtin_bsr is a exactly equivalent to the x86 machine
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* instruction with the exception that it returns -1
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* when the value presented to it is zero.
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* Otherwise __builtin_bsr returns the zero based index of
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* the highest bit set.
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*/
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return __builtin_bsr(value);
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}
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/* Base Address */
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#ifndef CONFIG_TTYS0_BASE
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#define CONFIG_TTYS0_BASE 0x3f8
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#endif
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#ifndef CONFIG_TTYS0_BAUD
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#define CONFIG_TTYS0_BAUD 115200
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#endif
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#if ((115200%CONFIG_TTYS0_BAUD) != 0)
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#error Bad ttys0 baud rate
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#endif
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#define CONFIG_TTYS0_DIV (115200/CONFIG_TTYS0_BAUD)
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/* Line Control Settings */
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#ifndef CONFIG_TTYS0_LCS
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/* Set 8bit, 1 stop bit, no parity */
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#define CONFIG_TTYS0_LCS 0x3
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#endif
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#define UART_LCS CONFIG_TTYS0_LCS
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/* Data */
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#define UART_RBR 0x00
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#define UART_TBR 0x00
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/* Control */
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#define UART_IER 0x01
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#define UART_IIR 0x02
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#define UART_FCR 0x02
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#define UART_LCR 0x03
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#define UART_MCR 0x04
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#define UART_DLL 0x00
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#define UART_DLM 0x01
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/* Status */
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#define UART_LSR 0x05
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#define UART_MSR 0x06
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#define UART_SCR 0x07
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int uart_can_tx_byte(void)
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{
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return inb(CONFIG_TTYS0_BASE + UART_LSR) & 0x20;
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}
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void uart_wait_to_tx_byte(void)
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{
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while(!uart_can_tx_byte())
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;
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}
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void uart_wait_until_sent(void)
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{
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while(!(inb(CONFIG_TTYS0_BASE + UART_LSR) & 0x40))
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;
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}
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void uart_tx_byte(unsigned char data)
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{
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uart_wait_to_tx_byte();
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outb(data, CONFIG_TTYS0_BASE + UART_TBR);
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/* Make certain the data clears the fifos */
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uart_wait_until_sent();
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}
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void uart_init(void)
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{
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/* disable interrupts */
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outb(0x0, CONFIG_TTYS0_BASE + UART_IER);
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/* enable fifo's */
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outb(0x01, CONFIG_TTYS0_BASE + UART_FCR);
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/* Set Baud Rate Divisor to 12 ==> 115200 Baud */
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outb(0x80 | UART_LCS, CONFIG_TTYS0_BASE + UART_LCR);
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outb(CONFIG_TTYS0_DIV & 0xFF, CONFIG_TTYS0_BASE + UART_DLL);
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outb((CONFIG_TTYS0_DIV >> 8) & 0xFF, CONFIG_TTYS0_BASE + UART_DLM);
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outb(UART_LCS, CONFIG_TTYS0_BASE + UART_LCR);
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}
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void __console_tx_char(unsigned char byte)
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{
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uart_tx_byte(byte);
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}
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void __console_tx_nibble(unsigned nibble)
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{
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unsigned char digit;
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digit = nibble + '0';
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if (digit > '9') {
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digit += 39;
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}
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__console_tx_char(digit);
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}
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void __console_tx_hex8(unsigned char byte)
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{
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__console_tx_nibble(byte >> 4);
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__console_tx_nibble(byte & 0x0f);
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}
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void __console_tx_hex32(unsigned char value)
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{
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__console_tx_nibble((value >> 28) & 0x0f);
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__console_tx_nibble((value >> 24) & 0x0f);
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__console_tx_nibble((value >> 20) & 0x0f);
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__console_tx_nibble((value >> 16) & 0x0f);
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__console_tx_nibble((value >> 12) & 0x0f);
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__console_tx_nibble((value >> 8) & 0x0f);
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__console_tx_nibble((value >> 4) & 0x0f);
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__console_tx_nibble(value & 0x0f);
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}
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#if HAVE_STRING_SUPPORT
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void __console_tx_string(char *str)
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{
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unsigned char ch;
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while((ch = *str++) != '\0') {
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__console_tx_char(ch);
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}
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}
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#else
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void __console_tx_string(char *str)
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{
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}
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#endif
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void print_emerg_char(unsigned char byte) { __console_tx_char(byte); }
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void print_emerg_hex8(unsigned char value) { __console_tx_hex8(value); }
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void print_emerg_hex32(unsigned int value) { __console_tx_hex32(value); }
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void print_emerg(char *str) { __console_tx_string(str); }
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void print_alert_char(unsigned char byte) { __console_tx_char(byte); }
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void print_alert_hex8(unsigned char value) { __console_tx_hex8(value); }
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void print_alert_hex32(unsigned int value) { __console_tx_hex32(value); }
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void print_alert(char *str) { __console_tx_string(str); }
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void print_crit_char(unsigned char byte) { __console_tx_char(byte); }
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void print_crit_hex8(unsigned char value) { __console_tx_hex8(value); }
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void print_crit_hex32(unsigned int value) { __console_tx_hex32(value); }
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void print_crit(char *str) { __console_tx_string(str); }
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void print_err_char(unsigned char byte) { __console_tx_char(byte); }
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void print_err_hex8(unsigned char value) { __console_tx_hex8(value); }
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void print_err_hex32(unsigned int value) { __console_tx_hex32(value); }
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void print_err(char *str) { __console_tx_string(str); }
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void print_warning_char(unsigned char byte) { __console_tx_char(byte); }
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void print_warning_hex8(unsigned char value) { __console_tx_hex8(value); }
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void print_warning_hex32(unsigned int value) { __console_tx_hex32(value); }
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void print_warning(char *str) { __console_tx_string(str); }
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void print_notice_char(unsigned char byte) { __console_tx_char(byte); }
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void print_notice_hex8(unsigned char value) { __console_tx_hex8(value); }
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void print_notice_hex32(unsigned int value) { __console_tx_hex32(value); }
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void print_notice(char *str) { __console_tx_string(str); }
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void print_info_char(unsigned char byte) { __console_tx_char(byte); }
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void print_info_hex8(unsigned char value) { __console_tx_hex8(value); }
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void print_info_hex32(unsigned int value) { __console_tx_hex32(value); }
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void print_info(char *str) { __console_tx_string(str); }
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void print_debug_char(unsigned char byte) { __console_tx_char(byte); }
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void print_debug_hex8(unsigned char value) { __console_tx_hex8(value); }
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void print_debug_hex32(unsigned int value) { __console_tx_hex32(value); }
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void print_debug(char *str) { __console_tx_string(str); }
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void print_spew_char(unsigned char byte) { __console_tx_char(byte); }
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void print_spew_hex8(unsigned char value) { __console_tx_hex8(value); }
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void print_spew_hex32(unsigned int value) { __console_tx_hex32(value); }
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void print_spew(char *str) { __console_tx_string(str); }
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#define PIIX4_DEVFN 0x90
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#define SMBUS_MEM_DEVICE_START 0x50
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#define SMBUS_MEM_DEVICE_END 0x53
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#define SMBUS_MEM_DEVICE_INC 1
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#define PM_BUS 0
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#define PM_DEVFN (PIIX4_DEVFN+3)
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#if HAVE_CONSTANT_PROPOGATION
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#define SMBUS_IO_BASE 0x1000
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#define SMBHSTSTAT 0
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#define SMBHSTCTL 2
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#define SMBHSTCMD 3
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#define SMBHSTADD 4
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#define SMBHSTDAT0 5
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#define SMBHSTDAT1 6
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#define SMBBLKDAT 7
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static void smbus_wait_until_ready(void)
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{
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while((inb(SMBUS_IO_BASE + SMBHSTSTAT) & 1) == 1) {
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/* nop */
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}
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}
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static void smbus_wait_until_done(void)
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{
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unsigned char byte;
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do {
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byte = inb(SMBUS_IO_BASE + SMBHSTSTAT);
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}while((byte &1) == 1);
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while( (byte & ~1) == 0) {
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byte = inb(SMBUS_IO_BASE + SMBHSTSTAT);
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}
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}
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int smbus_read_byte(unsigned device, unsigned address)
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{
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unsigned char host_status_register;
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unsigned char byte;
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int result;
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smbus_wait_until_ready();
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/* setup transaction */
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/* disable interrupts */
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outb(inb(SMBUS_IO_BASE + SMBHSTCTL) & (~1), SMBUS_IO_BASE + SMBHSTCTL);
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/* set the device I'm talking to */
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outb(((device & 0x7f) << 1) | 1, SMBUS_IO_BASE + SMBHSTADD);
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/* set the command/address... */
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outb(address & 0xFF, SMBUS_IO_BASE + SMBHSTCMD);
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/* set up for a byte data read */
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outb((inb(SMBUS_IO_BASE + SMBHSTCTL) & 0xE3) | (0x2 << 2), SMBUS_IO_BASE + SMBHSTCTL);
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/* clear any lingering errors, so the transaction will run */
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outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT);
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/* clear the data byte...*/
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outb(0, SMBUS_IO_BASE + SMBHSTDAT0);
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/* start the command */
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outb((inb(SMBUS_IO_BASE + SMBHSTCTL) | 0x40), SMBUS_IO_BASE + SMBHSTCTL);
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/* poll for transaction completion */
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smbus_wait_until_done();
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host_status_register = inb(SMBUS_IO_BASE + SMBHSTSTAT);
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/* read results of transaction */
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byte = inb(SMBUS_IO_BASE + SMBHSTDAT0);
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result = byte;
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if (host_status_register != 0x02) {
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result = -1;
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}
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return result;
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}
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#else /* !HAVE_CONSTANT_PROPOGATION */
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#define SMBUS_IO_HSTSTAT 0x1000
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#define SMBUS_IO_HSTCTL 0x1002
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#define SMBUS_IO_HSTCMD 0x1003
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#define SMBUS_IO_HSTADD 0x1004
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#define SMBUS_IO_HSTDAT0 0x1005
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#define SMBUS_IO_HSTDAT1 0x1006
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#define SMBUS_IO_HSTBLKDAT 0x1007
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static void smbus_wait_until_ready(void)
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{
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while((inb(SMBUS_IO_HSTSTAT) & 1) == 1) {
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/* nop */
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}
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}
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static void smbus_wait_until_done(void)
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{
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unsigned char byte;
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do {
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byte = inb(SMBUS_IO_HSTSTAT);
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}while((byte &1) == 1);
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while( (byte & ~1) == 0) {
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byte = inb(SMBUS_IO_HSTSTAT);
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}
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}
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short smbus_read_byte(unsigned char device, unsigned char address)
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{
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unsigned char host_status_register;
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short result;
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smbus_wait_until_ready();
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/* setup transaction */
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/* disable interrupts */
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outb(inb(SMBUS_IO_HSTCTL) & (~1), SMBUS_IO_HSTCTL);
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/* set the device I'm talking to */
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outb(((device & 0x7f) << 1) | 1, SMBUS_IO_HSTADD);
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/* set the command/address... */
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outb(address & 0xFF, SMBUS_IO_HSTCMD);
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/* set up for a byte data read */
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outb((inb(SMBUS_IO_HSTCTL) & 0xE3) | 8, SMBUS_IO_HSTCTL);
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/* clear any lingering errors, so the transaction will run */
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outb(inb(SMBUS_IO_HSTSTAT), SMBUS_IO_HSTSTAT);
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/* clear the data byte...*/
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outb(0, SMBUS_IO_HSTDAT0);
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/* start the command */
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outb((inb(SMBUS_IO_HSTCTL) | 0x40), SMBUS_IO_HSTCTL);
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/* poll for transaction completion */
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smbus_wait_until_done();
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host_status_register = inb(SMBUS_IO_HSTSTAT);
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/* read results of transaction */
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result = inb(SMBUS_IO_HSTDAT0);
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if (host_status_register != 0x02) {
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result = -1;
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}
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return result;
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}
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#endif /* HAVE_CONSTANT_PROPOGATION */
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#define I440GX_BUS 0
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#define I440GX_DEVFN ((0x00 << 3) + 0)
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static void spd_set_drb(void)
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{
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/*
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* Effects: Uses serial presence detect to set the
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* DRB registers which holds the ending memory address assigned
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* to each DIMM.
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*/
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unsigned end_of_memory;
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unsigned char device;
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unsigned char drb_reg;
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end_of_memory = 0; /* in multiples of 8MiB */
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device = SMBUS_MEM_DEVICE_START;
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#if !CALCULATE_DRB_REG
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drb_reg = 0x60;
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#endif
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while (device <= SMBUS_MEM_DEVICE_END) {
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unsigned side1_bits, side2_bits;
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int byte, byte2;
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side1_bits = side2_bits = -1;
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/* rows */
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byte = smbus_read_byte(device, 3);
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if (byte >= 0) {
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side1_bits += byte & 0xf;
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/* columns */
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byte = smbus_read_byte(device, 4);
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side1_bits += byte & 0xf;
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/* banks */
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byte = smbus_read_byte(device, 17);
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side1_bits += log2(byte);
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/* Get the module data width and convert it to a power of two */
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/* low byte */
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byte = smbus_read_byte(device, 6);
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/* high byte */
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byte2 = smbus_read_byte(device, 7);
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#if HAVE_CAST_SUPPORT
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side1_bits += log2((((unsigned long)byte2 << 8)| byte));
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#else
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side1_bits += log2((((byte2 << 8) | byte));
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#endif
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/* now I have the ram size in bits as a power of two (less 1) */
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/* Make it mulitples of 8MB */
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side1_bits -= 25;
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/* side two */
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/* number of physical banks */
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byte = smbus_read_byte(device, 5);
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if (byte > 1) {
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/* for now only handle the symmetrical case */
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side2_bits = side1_bits;
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}
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}
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/* Compute the end address for the DRB register */
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/* Only process dimms < 2GB (2^8 * 8MB) */
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if (side1_bits < 8) {
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end_of_memory += (1 << side1_bits);
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}
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#if CALCULATE_DRB_REG
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drb_reg = ((device - SMBUS_MEM_DEVICE_START) << 1) + 0x60;
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#endif
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#if HAVE_STRING_SUPPORT
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print_debug("end_of_memory: "); print_debug_hex32(end_of_memory); print_debug("\n");
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#endif
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pcibios_write_config_byte(I440GX_BUS, I440GX_DEVFN, drb_reg, end_of_memory);
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if (side2_bits < 8 ) {
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end_of_memory += (1 << side2_bits);
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}
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#if HAVE_STRING_SUPPORT
|
|
print_debug("end_of_memory: "); print_debug_hex32(end_of_memory); print_debug("\n");
|
|
#endif
|
|
pcibios_write_config_byte(I440GX_BUS, I440GX_DEVFN, drb_reg +1, end_of_memory);
|
|
|
|
#if !CALCULATE_DRB_REG
|
|
drb_reg += 2;
|
|
#endif
|
|
device += SMBUS_MEM_DEVICE_INC;
|
|
}
|
|
}
|