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Geode UART2 (for Fuloong) fwstart.img support

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Vladimir 'phcoder' Serbinenko 2011-01-24 00:40:03 +01:00
parent 1ccfc5d201
commit 5ea788ada0
1 changed files with 41 additions and 1 deletions
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42
grub-core/boot/mips/yeeloong/fwstart.S
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@ -26,8 +26,13 @@
#include <grub/cs5536.h>
#include <grub/smbus.h>
#ifdef FULOONG
#define GRUB_MACHINE_SERIAL_PORT GRUB_MACHINE_SERIAL_PORT2
#define GRUB_MACHINE_SERIAL_DIVISOR_115200 GRUB_MACHINE_SERIAL_PORT2_DIVISOR_115200
#else
#define GRUB_MACHINE_SERIAL_PORT GRUB_MACHINE_SERIAL_PORT0
#define GRUB_MACHINE_SERIAL_DIVISOR_115200 GRUB_MACHINE_SERIAL_PORT0_DIVISOR_115200
#endif
.set noreorder
.set noat
@ -37,8 +42,14 @@
start:
_start:
__start:
/* Put serial init as soon as possible. But on Fuloong serial is past
Geode, so on Fuloong we need Geode first.
*/
#ifndef FULOONG
bal serial_hw_init
nop
#endif
/* Find CS5536 controller. */
/* $t4 chooses device in priority encoding. */
/* Resulting value is kept in GRUB_MACHINE_PCI_CONF_CTRL_REG.
@ -60,10 +71,12 @@ retry_cs5536:
bnel $t2, $t3, 1b
sll $t4, $t4, 1
#ifndef FULOONG
bal message
addiu $a0, $a0, %lo(cs5536_found)
bal printhex
move $a0, $t4
#endif
lui $t0, %hi(GRUB_MACHINE_PCI_CONFSPACE)
li $t1, GRUB_CS5536_MSR_MAILBOX_CONFIG_ENABLED
@ -81,6 +94,11 @@ retry_cs5536:
bal gpio_init
nop
#ifdef FULOONG
bal serial_hw_init
nop
#endif
/* Initialise SMBus controller. */
/* Set SMBUS LBAR. */
lui $a0, %hi(GRUB_CS5536_MSR_SMB_BAR)
@ -230,8 +248,29 @@ gpio_init:
/* Same as similarly named C function but in asm since
we need it early. */
/* In: none. Out: none. Clobbered: $t0, $t1, $a0. */
/* In: none. Out: none. Clobbered: $t0, $t1, $t2, $a0, $a1, $a2. */
serial_hw_init:
move $t2, $ra
#ifdef FULOONG
lui $a0, %hi(GRUB_CS5536_MSR_DIVIL_LEG_IO)
addiu $a0, $a0, %lo(GRUB_CS5536_MSR_DIVIL_LEG_IO)
li $a1, 0x04570003
bal wrmsr
move $a2, $zero
lui $a0, %hi(GRUB_CS5536_MSR_DIVIL_UART1_CONF)
addiu $a0, $a0, %lo(GRUB_CS5536_MSR_DIVIL_UART1_CONF)
li $a1, 2
bal wrmsr
move $a2, $zero
lui $a0, %hi(GRUB_CS5536_MSR_DIVIL_UART2_CONF)
addiu $a0, $a0, %lo(GRUB_CS5536_MSR_DIVIL_UART2_CONF)
li $a1, 2
bal wrmsr
move $a2, $zero
#endif
lui $t0, %hi (GRUB_MACHINE_SERIAL_PORT)
/* Turn off the interrupt. */
@ -261,6 +300,7 @@ serial_hw_init:
/* Let message return to original caller. */
lui $a0, %hi(notification_string)
addiu $a0, $a0, %lo(notification_string)
move $ra, $t2
/* Print message on serial console. */
/* In: $a0 = asciiz message. Out: none. Clobbered: $t0, $t1, $a0. */