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Retry the scan for CS5536 in case of failure

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2011-01-23 21:52:43 +01:00
parent ea9e017dc5
commit 9b4ad415e6
1 changed files with 4 additions and 4 deletions
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8
grub-core/boot/mips/yeeloong/fwstart.S
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@ -43,17 +43,18 @@ __start:
/* $t4 chooses device in priority encoding. */
/* Resulting value is kept in GRUB_MACHINE_PCI_CONF_CTRL_REG.
This way we don't need to sacrifice a register for it. */
retry_cs5536:
/* We have only one bus (0). Function is 0. */
lui $t0, %hi(GRUB_MACHINE_PCI_CONF_CTRL_REG_ADDR)
lui $t1, %hi(GRUB_MACHINE_PCI_CONFSPACE)
lui $t3, %hi(GRUB_CS5536_PCIID)
addiu $t3, $t3, %lo(GRUB_CS5536_PCIID)
ori $t4, $zero, 1
lui $a0, %hi(no_cs5536)
1:
andi $t4, $t4, ((1 << GRUB_PCI_NUM_DEVICES) - 1)
beql $t4, $zero, fatal
addiu $a0, $a0, %lo(no_cs5536)
/* In case of failure try again. CS5536 may be slow to come up. */
beql $t4, $zero, retry_cs5536
nop
sw $t4, %lo(GRUB_MACHINE_PCI_CONF_CTRL_REG_ADDR) ($t0)
lw $t2, (%lo(GRUB_MACHINE_PCI_CONFSPACE) + GRUB_PCI_REG_PCI_ID) ($t1)
bnel $t2, $t3, 1b
@ -383,7 +384,6 @@ read_spd_fail:
ori $v0, $v0, 0x100
notification_string: .asciz "GRUB "
no_cs5536: .asciz "No CS5536 found.\n\r"
cs5536_found: .asciz "CS5536 at "
sm_failed: .asciz "SM transaction failed.\n\r"
unhandled_tlb_refill: .asciz "Unhandled TLB refill.\n\r"