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MPC5200: enable snooping of DMA transactions on XLB even if no PCI

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is configured; othrwise DMA accesses aren't cache coherent which
causes for example USB to fail.
This commit is contained in:
Wolfgang Denk 2006-04-18 11:05:03 +02:00
parent cf48eb9abd
commit 8419c01304
3 changed files with 8 additions and 4 deletions
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4
CHANGELOG
View file

@ -2,6 +2,10 @@
Changes since U-Boot 1.1.4:
======================================================================
* MPC5200: enable snooping of DMA transactions on XLB even if no PCI
is configured; othrwise DMA accesses aren't cache coherent which
causes for example USB to fail.
* Some code cleanup
* Fix dbau1x00 boards broken by dbau1550 patch

4
cpu/mpc5xxx/cpu_init.c
View file

@ -152,6 +152,10 @@ void cpu_init_f (void)
/* enable timebase */
*(vu_long *)(MPC5XXX_XLBARB + 0x40) |= (1 << 13);
/* Enable snooping for RAM */
*(vu_long *)(MPC5XXX_XLBARB + 0x40) |= (1 << 15);
*(vu_long *)(MPC5XXX_XLBARB + 0x70) = CFG_SDRAM_BASE | 0x1d;
# if defined(CFG_IPBSPEED_133)
/* Motorola reports IPB should better run at 133 MHz. */
*(vu_long *)MPC5XXX_ADDECR |= 1;

4
cpu/mpc5xxx/pci_mpc5200.c
View file

@ -135,10 +135,6 @@ void pci_mpc5xxx_init (struct pci_controller *hose)
*(vu_long *)MPC5XXX_PCI_BAR1 = CONFIG_PCI_MEMORY_BUS | (1 << 3);
*(vu_long *)MPC5XXX_PCI_TBATR1 = CONFIG_PCI_MEMORY_PHYS | 1;
/* Enable snooping for RAM */
*(vu_long *)(MPC5XXX_XLBARB + 0x40) |= (1 << 15);
*(vu_long *)(MPC5XXX_XLBARB + 0x70) = CONFIG_PCI_MEMORY_PHYS | 0x1d;
/* Park XLB on PCI */
*(vu_long *)(MPC5XXX_XLBARB + 0x40) &= ~((7 << 8) | (3 << 5));
*(vu_long *)(MPC5XXX_XLBARB + 0x40) |= (3 << 8) | (3 << 5);