diff options
Diffstat (limited to 'board/imgtec/malta/lowlevel_init.S')
| -rw-r--r-- | board/imgtec/malta/lowlevel_init.S | 164 |
1 files changed, 163 insertions, 1 deletions
diff --git a/board/imgtec/malta/lowlevel_init.S b/board/imgtec/malta/lowlevel_init.S index fa0b6a7..1af34f1 100644 --- a/board/imgtec/malta/lowlevel_init.S +++ b/board/imgtec/malta/lowlevel_init.S @@ -6,6 +6,8 @@ #include <config.h> #include <gt64120.h> +#include <msc01.h> +#include <pci.h> #include <asm/addrspace.h> #include <asm/regdef.h> @@ -25,6 +27,25 @@ .globl lowlevel_init lowlevel_init: + /* detect the core card */ + li t0, KSEG1ADDR(MALTA_REVISION) + lw t0, 0(t0) + srl t0, t0, MALTA_REVISION_CORID_SHF + andi t0, t0, (MALTA_REVISION_CORID_MSK >> \ + MALTA_REVISION_CORID_SHF) + + /* core cards using the gt64120 system controller */ + li t1, MALTA_REVISION_CORID_CORE_LV + beq t0, t1, _gt64120 + + /* core cards using the MSC01 system controller */ + li t1, MALTA_REVISION_CORID_CORE_FPGA6 + beq t0, t1, _msc01 + nop + + /* unknown system controller */ + b . + nop /* * Load BAR registers of GT64120 as done by YAMON @@ -39,7 +60,7 @@ lowlevel_init: * based on write_bootloader() in qemu.git/hw/mips_malta.c * see GT64120 manual and qemu.git/hw/gt64xxx.c for details */ - +_gt64120: /* move GT64120 registers from 0x14000000 to 0x1be00000 */ li t1, KSEG1ADDR(GT_DEF_BASE) li t0, CPU_TO_GT32(0xdf000000) @@ -67,3 +88,144 @@ lowlevel_init: jr ra nop + + /* + * + */ +_msc01: + /* setup peripheral bus controller clock divide */ + li t0, KSEG1ADDR(MALTA_MSC01_PBC_BASE) + li t1, 0x1 << MSC01_PBC_CLKCFG_SHF + sw t1, MSC01_PBC_CLKCFG_OFS(t0) + + /* tweak peripheral bus controller timings */ + li t1, (0x1 << MSC01_PBC_CS0TIM_CDT_SHF) | \ + (0x1 << MSC01_PBC_CS0TIM_CAT_SHF) + sw t1, MSC01_PBC_CS0TIM_OFS(t0) + li t1, (0x0 << MSC01_PBC_CS0RW_RDT_SHF) | \ + (0x2 << MSC01_PBC_CS0RW_RAT_SHF) | \ + (0x0 << MSC01_PBC_CS0RW_WDT_SHF) | \ + (0x2 << MSC01_PBC_CS0RW_WAT_SHF) + sw t1, MSC01_PBC_CS0RW_OFS(t0) + lw t1, MSC01_PBC_CS0CFG_OFS(t0) + li t2, MSC01_PBC_CS0CFG_DTYP_MSK + and t1, t2 + ori t1, (0x0 << MSC01_PBC_CS0CFG_ADM_SHF) | \ + (0x3 << MSC01_PBC_CS0CFG_WSIDLE_SHF) | \ + (0x10 << MSC01_PBC_CS0CFG_WS_SHF) + sw t1, MSC01_PBC_CS0CFG_OFS(t0) + + /* setup basic address decode */ + li t0, KSEG1ADDR(MALTA_MSC01_BIU_BASE) + li t1, 0x0 + li t2, -CONFIG_SYS_MEM_SIZE + sw t1, MSC01_BIU_MCBAS1L_OFS(t0) + sw t2, MSC01_BIU_MCMSK1L_OFS(t0) + sw t1, MSC01_BIU_MCBAS2L_OFS(t0) + sw t2, MSC01_BIU_MCMSK2L_OFS(t0) + + /* initialise IP1 - unused */ + li t1, MALTA_MSC01_IP1_BASE + li t2, -MALTA_MSC01_IP1_SIZE + sw t1, MSC01_BIU_IP1BAS1L_OFS(t0) + sw t2, MSC01_BIU_IP1MSK1L_OFS(t0) + sw t1, MSC01_BIU_IP1BAS2L_OFS(t0) + sw t2, MSC01_BIU_IP1MSK2L_OFS(t0) + + /* initialise IP2 - PCI */ + li t1, MALTA_MSC01_IP2_BASE1 + li t2, -MALTA_MSC01_IP2_SIZE1 + sw t1, MSC01_BIU_IP2BAS1L_OFS(t0) + sw t2, MSC01_BIU_IP2MSK1L_OFS(t0) + li t1, MALTA_MSC01_IP2_BASE2 + li t2, -MALTA_MSC01_IP2_SIZE2 + sw t1, MSC01_BIU_IP2BAS2L_OFS(t0) + sw t2, MSC01_BIU_IP2MSK2L_OFS(t0) + + /* initialise IP3 - peripheral bus controller */ + li t1, MALTA_MSC01_IP3_BASE + li t2, -MALTA_MSC01_IP3_SIZE + sw t1, MSC01_BIU_IP3BAS1L_OFS(t0) + sw t2, MSC01_BIU_IP3MSK1L_OFS(t0) + sw t1, MSC01_BIU_IP3BAS2L_OFS(t0) + sw t2, MSC01_BIU_IP3MSK2L_OFS(t0) + + /* setup PCI memory */ + li t0, KSEG1ADDR(MALTA_MSC01_PCI_BASE) + li t1, MALTA_MSC01_PCIMEM_BASE + li t2, (-MALTA_MSC01_PCIMEM_SIZE) & MSC01_PCI_SC2PMMSKL_MSK_MSK + li t3, MALTA_MSC01_PCIMEM_MAP + sw t1, MSC01_PCI_SC2PMBASL_OFS(t0) + sw t2, MSC01_PCI_SC2PMMSKL_OFS(t0) + sw t3, MSC01_PCI_SC2PMMAPL_OFS(t0) + + /* setup PCI I/O */ + li t1, MALTA_MSC01_PCIIO_BASE + li t2, (-MALTA_MSC01_PCIIO_SIZE) & MSC01_PCI_SC2PIOMSKL_MSK_MSK + li t3, MALTA_MSC01_PCIIO_MAP + sw t1, MSC01_PCI_SC2PIOBASL_OFS(t0) + sw t2, MSC01_PCI_SC2PIOMSKL_OFS(t0) + sw t3, MSC01_PCI_SC2PIOMAPL_OFS(t0) + + /* setup PCI_BAR0 memory window */ + li t1, -CONFIG_SYS_MEM_SIZE + sw t1, MSC01_PCI_BAR0_OFS(t0) + + /* setup PCI to SysCon/CPU translation */ + sw t1, MSC01_PCI_P2SCMSKL_OFS(t0) + sw zero, MSC01_PCI_P2SCMAPL_OFS(t0) + + /* setup PCI vendor & device IDs */ + li t1, (PCI_VENDOR_ID_MIPS << MSC01_PCI_HEAD0_VENDORID_SHF) | \ + (PCI_DEVICE_ID_MIPS_MSC01 << MSC01_PCI_HEAD0_DEVICEID_SHF) + sw t1, MSC01_PCI_HEAD0_OFS(t0) + + /* setup PCI subsystem vendor & device IDs */ + sw t1, MSC01_PCI_HEAD11_OFS(t0) + + /* setup PCI class, revision */ + li t1, (PCI_CLASS_BRIDGE_HOST << MSC01_PCI_HEAD2_CLASS_SHF) | \ + (0x1 << MSC01_PCI_HEAD2_REV_SHF) + sw t1, MSC01_PCI_HEAD2_OFS(t0) + + /* ensure a sane setup */ + sw zero, MSC01_PCI_HEAD3_OFS(t0) + sw zero, MSC01_PCI_HEAD4_OFS(t0) + sw zero, MSC01_PCI_HEAD5_OFS(t0) + sw zero, MSC01_PCI_HEAD6_OFS(t0) + sw zero, MSC01_PCI_HEAD7_OFS(t0) + sw zero, MSC01_PCI_HEAD8_OFS(t0) + sw zero, MSC01_PCI_HEAD9_OFS(t0) + sw zero, MSC01_PCI_HEAD10_OFS(t0) + sw zero, MSC01_PCI_HEAD12_OFS(t0) + sw zero, MSC01_PCI_HEAD13_OFS(t0) + sw zero, MSC01_PCI_HEAD14_OFS(t0) + sw zero, MSC01_PCI_HEAD15_OFS(t0) + + /* setup PCI command register */ + li t1, (PCI_COMMAND_FAST_BACK | \ + PCI_COMMAND_SERR | \ + PCI_COMMAND_PARITY | \ + PCI_COMMAND_MASTER | \ + PCI_COMMAND_MEMORY) + sw t1, MSC01_PCI_HEAD1_OFS(t0) + + /* setup PCI byte swapping */ +#ifdef CONFIG_SYS_BIG_ENDIAN + li t1, (0x1 << MSC01_PCI_SWAP_BAR0_BSWAP_SHF) | \ + (0x1 << MSC01_PCI_SWAP_IO_BSWAP_SHF) + sw t1, MSC01_PCI_SWAP_OFS(t0) +#else + sw zero, MSC01_PCI_SWAP_OFS(t0) +#endif + + /* enable PCI host configuration cycles */ + lw t1, MSC01_PCI_CFG_OFS(t0) + li t2, MSC01_PCI_CFG_RA_MSK | \ + MSC01_PCI_CFG_G_MSK | \ + MSC01_PCI_CFG_EN_MSK + or t1, t1, t2 + sw t1, MSC01_PCI_CFG_OFS(t0) + + jr ra + nop |