Author: mcayland Date: Wed Sep 24 20:03:48 2014 New Revision: 1317 URL: http://tracker.coreboot.org/trac/openbios/changeset/1317
Log: SPARC64: configure the Sabre PCI TAS register
Make sure that we declare the same range available as set by the virtual-dma properties hardcoded in sabre_configure().
This register is checked by FreeBSD during boot which panics if it finds a default (zero) value.
Signed-off-by: Mark Cave-Ayland mark.cave-ayland@ilande.co.uk
Modified: trunk/openbios-devel/arch/sparc64/openbios.c
Modified: trunk/openbios-devel/arch/sparc64/openbios.c ============================================================================== --- trunk/openbios-devel/arch/sparc64/openbios.c Mon Aug 25 15:08:08 2014 (r1316) +++ trunk/openbios-devel/arch/sparc64/openbios.c Wed Sep 24 20:03:48 2014 (r1317) @@ -116,6 +116,20 @@ : : "r" (val), "r" (addr) : "memory"); }
+/* PCI Target Address Space Register (see UltraSPARC IIi User's Manual + section 19.3.0.4) */ +#define PBM_PCI_TARGET_AS 0x2028 +#define PBM_PCI_TARGET_AS_CD_ENABLE 0x40 + +static void +sparc64_set_tas_register(unsigned long val) +{ + unsigned long addr = APB_SPECIAL_BASE + PBM_PCI_TARGET_AS; + + asm("stxa %0, [%1] 0x15\n\t" + : : "r" (val), "r" (addr) : "memory"); +} + static void cpu_generic_init(const struct cpudef *cpu, uint32_t clock_frequency) { unsigned long iu_version; @@ -574,6 +588,10 @@ modules_init(); #ifdef CONFIG_DRIVER_PCI ob_pci_init(); + + /* Set TAS register to match the virtual-dma properties + set during sabre configure */ + sparc64_set_tas_register(PBM_PCI_TARGET_AS_CD_ENABLE); #endif nvconf_init(); device_end();