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pci/fsl_pci_init: Add a common PCI inbound setup function

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Add a common setup function that determines the pci_region(s) based
on how much memory we have in the system.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Andrew Fleming-AFLEMING <afleming@freescale.com>
This commit is contained in:
Kumar Gala 2008-10-22 14:06:24 -05:00 committed by Andrew Fleming-AFLEMING
parent 612ea01018
commit b9a1fa9787
1 changed files with 81 additions and 0 deletions
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81
drivers/pci/fsl_pci_init.c
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@ -18,6 +18,8 @@
#include <common.h>
DECLARE_GLOBAL_DATA_PTR;
/*
* PCI/PCIE Controller initialization for mpc85xx/mpc86xx soc's
*
@ -41,6 +43,85 @@ void pciauto_postscan_setup_bridge(struct pci_controller *hose,
pci_dev_t dev, int sub_bus);
void pciauto_config_init(struct pci_controller *hose);
#ifndef CONFIG_SYS_PCI_MEMORY_BUS
#define CONFIG_SYS_PCI_MEMORY_BUS 0
#endif
#ifndef CONFIG_SYS_PCI_MEMORY_PHYS
#define CONFIG_SYS_PCI_MEMORY_PHYS 0
#endif
#if defined(CONFIG_SYS_PCI_64BIT) && !defined(CONFIG_SYS_PCI64_MEMORY_BUS)
#define CONFIG_SYS_PCI64_MEMORY_BUS (64ull*1024*1024*1024)
#endif
int fsl_pci_setup_inbound_windows(struct pci_region *r)
{
struct pci_region *rgn_base = r;
u64 sz = min((u64)gd->ram_size, 1ull << 32);
phys_addr_t phys_start = CONFIG_SYS_PCI_MEMORY_PHYS;
pci_addr_t bus_start = CONFIG_SYS_PCI_MEMORY_BUS;
pci_size_t pci_sz = 1ull << __ilog2_u64(sz);
debug ("R0 bus_start: %llx phys_start: %llx size: %llx\n",
(u64)bus_start, (u64)phys_start, (u64)pci_sz);
pci_set_region(r++, bus_start, phys_start, pci_sz,
PCI_REGION_MEM | PCI_REGION_MEMORY | \
PCI_REGION_PREFETCH);
sz -= pci_sz;
bus_start += pci_sz;
phys_start += pci_sz;
pci_sz = 1ull << __ilog2_u64(sz);
if (sz) {
debug ("R1 bus_start: %llx phys_start: %llx size: %llx\n",
(u64)bus_start, (u64)phys_start, (u64)pci_sz);
pci_set_region(r++, bus_start, phys_start, pci_sz,
PCI_REGION_MEM | PCI_REGION_MEMORY | \
PCI_REGION_PREFETCH);
sz -= pci_sz;
bus_start += pci_sz;
phys_start += pci_sz;
}
#if defined(CONFIG_PHYS_64BIT) && defined(CONFIG_SYS_PCI_64BIT)
pci_sz = 1ull << __ilog2_u64(gd->ram_size);
/* round up to the next largest power of two */
if (gd->ram_size > pci_sz)
sz = 1ull << (__ilog2_u64(gd->ram_size) + 1);
debug ("R64 bus_start: %llx phys_start: %llx size: %llx\n",
(u64)CONFIG_SYS_PCI_MEMORY_BUS,
(u64)CONFIG_SYS_PCI_MEMORY_PHYS,
(u64)pci_sz);
pci_set_region(r++,
CONFIG_SYS_PCI_MEMORY_BUS,
CONFIG_SYS_PCI_MEMORY_PHYS,
pci_sz,
PCI_REGION_MEM | PCI_REGION_MEMORY | \
PCI_REGION_PREFETCH);
#else
pci_sz = 1ull << __ilog2_u64(sz);
if (sz) {
debug ("R2 bus_start: %llx phys_start: %llx size: %llx\n",
(u64)bus_start, (u64)phys_start, (u64)pci_sz);
pci_set_region(r++, bus_start, phys_start, pci_sz,
PCI_REGION_MEM | PCI_REGION_MEMORY | \
PCI_REGION_PREFETCH);
sz -= pci_sz;
bus_start += pci_sz;
phys_start += pci_sz;
}
#endif
if (sz && (((u64)gd->ram_size) < (1ull << 32)))
printf("Was not able to map all of memory via "
"inbound windows -- %lld remaining\n", sz);
return r - rgn_base;
}
void fsl_pci_init(struct pci_controller *hose)
{
u16 temp16;