struct efi_reset_system_t reset_system;
};
+enum loongson_bridge_type {
+ RS780E = 1,
+ LS7A = 2
+};
+
struct loongson_system_configuration {
u32 nr_cpus;
u32 nr_nodes;
u16 boot_cpu_id;
u16 reserved_cpus_mask;
enum loongson_cpu_type cputype;
+ enum loongson_bridge_type bridgetype;
u64 ht_control_base;
u64 pci_mem_start_addr;
u64 pci_mem_end_addr;
* Author: Wu Zhangjin, wuzhangjin@gmail.com
*/
#include <linux/export.h>
+#include <linux/pci_ids.h>
#include <asm/bootinfo.h>
#include <loongson.h>
#include <boot_param.h>
#include <builtin_dtbs.h>
#include <workarounds.h>
+#define HOST_BRIDGE_CONFIG_ADDR ((void __iomem *)TO_UNCAC(0x1a000000))
+
u32 cpu_clock_freq;
EXPORT_SYMBOL(cpu_clock_freq);
struct efi_memory_map_loongson *loongson_memmap;
struct system_loongson *esys;
struct efi_cpuinfo_loongson *ecpu;
struct irq_source_routing_table *eirq_source;
+ u32 id;
+ u16 vendor, device;
/* firmware arguments are initialized in head.S */
boot_p = (struct boot_params *)fw_arg2;
memcpy(loongson_sysconf.sensors, esys->sensors,
sizeof(struct sensor_device) * loongson_sysconf.nr_sensors);
pr_info("CpuClock = %u\n", cpu_clock_freq);
+
+ /* Read the ID of PCI host bridge to detect bridge type */
+ id = readl(HOST_BRIDGE_CONFIG_ADDR);
+ vendor = id & 0xffff;
+ device = (id >> 16) & 0xffff;
+
+ if (vendor == PCI_VENDOR_ID_LOONGSON && device == 0x7a00) {
+ pr_info("The bridge chip is LS7A\n");
+ loongson_sysconf.bridgetype = LS7A;
+ } else {
+ pr_info("The bridge chip is RS780E or SR5690\n");
+ loongson_sysconf.bridgetype = RS780E;
+ }
}