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142 lines
3.1 KiB
142 lines
3.1 KiB
/*smh : pcitlb.S
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used to map address accessing for kuseg to address accessing for system memory beyond low 256M memory
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used to map address accessing for kseg2 to address accessing for pci memory which are from 0x40000000
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*/
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/***********************************************************************************************************/
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/**************************************** MAP KSEG2 ********************************************************/
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/** MAP virtual address: 0xc0000000~ 0xffffffff to physical address: 0x40000000~ 0x7fffffff for PCI-MEM **/
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/***********************************************************************************************************/
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li t0, 0x20000000
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.set mips64
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mfc0 t1, COP_0_TLB_PG_MASK, 1
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or t1, t1, t0
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mtc0 t1, COP_0_TLB_PG_MASK, 1
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dmfc0 t0, COP_0_CONFIG, 3
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ori t0, t0, 0x80
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dmtc0 t0, COP_0_CONFIG, 3
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.set mips3
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li t0, 0x01ffe000
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mtc0 t0, COP_0_TLB_PG_MASK # 16MB page
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li t0, 31
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li t3, 0xc0000000 # entry_hi
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#dli t4, (0x00000e0040000000 >> 6)|0x17 # entry_lo, uncached, valid, dirty, global
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#li t4, 0x0e004000
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li t4, 0x00004000
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#li t4, 0x0efdf000
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.set mips64
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dsll t4, t4, 10
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.set mips3
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ori t4, t4, 0x17
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li t5, (0x1000000>>6) # 16M stride
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li t6, 0x2000000 # VPN2 32M stride
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.set mips64
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1:
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dmtc0 t3, COP_0_TLB_HI
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daddu t3, t3, t6
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dmtc0 t4, COP_0_TLB_LO0
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daddu t4, t4, t5
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dmtc0 t4, COP_0_TLB_LO1
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daddu t4, t4, t5
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.set mips3
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mtc0 t0, COP_0_TLB_INDEX # 16MB page
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nop
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nop
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nop
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nop
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nop
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tlbwi # random++
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bgez t0, 1b
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addiu t0, t0, -1
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li t0, 32
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mtc0 t0, COP_0_TLB_WIRED # 16MB page
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/***********************************************************************************************************/
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/**************************************** MAP KUSEG ********************************************************/
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/** MAP virtual address: 0x40000000~ 0x7fffffff to physical address: 0x80000000~ 0xbfffffff for SYS-MEM **/
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/***********************************************************************************************************/
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#ifdef CONFIG_GFXUMA /* for UMA mode. */
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li t0, 0x80000000
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.set mips64
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dmfc0 t1, COP_0_TLB_PG_MASK, 1
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or t1, t1, t0
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dmtc0 t1, COP_0_TLB_PG_MASK, 1
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dmfc0 t0, COP_0_CONFIG, 3
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ori t0, t0, 0x80
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dmtc0 t0, COP_0_CONFIG, 3
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.set mips3
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li t0, 0x01ffe000
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mtc0 t0, COP_0_TLB_PG_MASK # 16MB page
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li t0, 63
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li t3, 0x40000000 # entry_hi
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#dli t4, (0x00000e0040000000 >> 6)|0x17 # entry_lo, uncached, valid, dirty, global
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#li t4, 0x0e004000
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li t4, 0x00008000
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#li t4, 0x0efdf000
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.set mips64
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dsll t4, t4, 10
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.set mips3
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ori t4, t4, 0x17
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li t5, (0x1000000>>6) # 16M stride
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li t6, 0x2000000 # VPN2 32M stride
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.set mips64
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li t7, 32
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1:
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dmtc0 t3, COP_0_TLB_HI
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daddu t3, t3, t6
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dmtc0 t4, COP_0_TLB_LO0
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daddu t4, t4, t5
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dmtc0 t4, COP_0_TLB_LO1
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daddu t4, t4, t5
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.set mips3
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mtc0 t0, COP_0_TLB_INDEX # 16MB page
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nop
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nop
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nop
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nop
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nop
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tlbwi # random++
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#bnez t0, 1b
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addiu t0, t0, -1
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bge t0, t7, 1b
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nop
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li t0, 64
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mtc0 t0, COP_0_TLB_WIRED # 16MB page
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#endif
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