forked from KolibriOS/kolibrios
284 lines
7.7 KiB
PHP
284 lines
7.7 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) 2010 KolibriOS team. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;; HT.inc ;; ;;
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;; ;;
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;; AMD HyperTransport bus control ;;
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;; ;;
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;; art_zh <kolibri@jerdev.co.uk> ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision: 1554 $
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NB_MISC_INDEX equ 0xF0000060 ; NB Misc indirect access
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NB_MISC_DATA equ 0xF0000064
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PCIEIND_INDEX equ 0xF00000E0 ; PCIe Core indirect config space access
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HTIU_NB_INDEX equ 0xF0000094 ; HyperTransport indirect config space access
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;=============================================================================
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;
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; This code is a part of Kolibri-A and will only work with AMD RS760+ chipsets
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;
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;=============================================================================
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org $-OS_BASE ; physical addresses needed at initial stage
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align 4
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;------------------------------------------
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; params: al = nbconfig register#
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; returns: eax = register content
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;
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rs7xx_nbconfig_read_pci:
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and eax, 0x0FC ; leave register# only
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or eax, 0x80000000 ; bdf = 0:0.0
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mov dx, 0x0CF8 ; write to index reg
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out dx, eax
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add dl, 4
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in eax, dx
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ret
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align 4
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rs7xx_nbconfig_flush_pci:
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mov eax, 0x0B0 ; a scratch reg
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mov dx, 0xCF8
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out dx, eax
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ret
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align 4
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;------------------------------------------
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; params: al = nbconfig register#
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; ebx = register content
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;
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rs7xx_nbconfig_write_pci:
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and eax, 0x0FC ; leave register# only
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or eax, 0x80000000 ; bdf = 0:0.0
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mov dx, 0x0CF8 ; write to index reg
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out dx, eax
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add dl, 4
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mov eax, ebx
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out dx, eax
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ret
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;***************************************************************************
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; Function
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; rs7xx_unlock_bar3: unlocks the BAR3 register of nbconfig that
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; makes pcie config address space visible
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; -----------------------
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; in: nothing out: nothing destroys: eax ebx edx
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;
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;***************************************************************************
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align 4
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rs7xx_unlock_bar3:
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mov eax, NB_MISC_INDEX
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mov ebx, 0x080 ; NBMISCIND:0x0; write-enable
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call rs7xx_nbconfig_write_pci ; set index
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mov eax, NB_MISC_DATA
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call rs7xx_nbconfig_read_pci ; read data
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mov ebx, eax
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and ebx, 0xFFFFFFF7 ; clear bit3
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mov eax, NB_MISC_DATA
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call rs7xx_nbconfig_write_pci ; write it back
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mov eax, NB_MISC_INDEX
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xor ebx, ebx ; reg#0; write-locked
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call rs7xx_nbconfig_write_pci ; set index
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ret
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;***************************************************************************
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; Function
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; rs7xx_pcie_init:
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;
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; Description
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; PCIe extended (memory-mapped) config space detection
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;
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;***************************************************************************
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align 4
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rs7xx_pcie_init:
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call rs7xx_unlock_bar3
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mov al, 0x7C ; NB_IOC_CFG_CNTL
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call rs7xx_nbconfig_read_pci
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mov ebx, eax
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; call rs7xx_nbconfig_flush_pci
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test ebx, 0x20000000 ; BAR3 locked?
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jz $
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mov al, 0x84 ; NB_PCI_ARB
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call rs7xx_nbconfig_read_pci
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shr eax,16
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and ax, 7 ; the Bus range lays here:
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jnz @f
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mov ax, 8 ; 1=2Mb, 2=4MB, 3=8MB, 4=16MB
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@@:
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mov word[PCIe_bus_range-OS_BASE], ax ; 5=32Mb, 6=64MB, 7=128Mb, 8=256Mb
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mov cl, al
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call rs7xx_nbconfig_flush_pci
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dec cl ; <4M ?
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jz @f
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dec cl ; one PDE needed anyway
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@@:
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mov ebx, 1
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shl ebx, cl
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mov word[mmio_pcie_cfg_pdes-OS_BASE], bx ; 1..64 PDE(s) needed,
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shl ebx, 22
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mov dword[mmio_pcie_cfg_lim-OS_BASE], ebx ; or 4..256Mb space to map
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dec dword[mmio_pcie_cfg_lim-OS_BASE]
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mov al, 0x1C ; NB_BAR3_PCIEXP_MMCFG
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call rs7xx_nbconfig_read_pci
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mov ebx, eax
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call rs7xx_nbconfig_flush_pci
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mov eax, ebx
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and eax, 0xFFE00000 ; valid bits [31..21]
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jz $ ; NB BAR3 may be invisible!
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.addr_found:
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mov dword[mmio_pcie_cfg_addr-OS_BASE], eax ; physical address (lower 32 bits)
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add dword[mmio_pcie_cfg_lim-OS_BASE], eax
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or eax, (PG_NOCACHE + PG_SHARED + PG_LARGE + PG_UW) ; by the way, UW is unsafe!
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mov ecx, PCIe_CONFIG_SPACE ; linear address
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mov ebx, ecx
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shr ebx, 20
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add ebx, (sys_pgdir - OS_BASE) ; PgDir entry @
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mov dl, byte[mmio_pcie_cfg_pdes-OS_BASE] ; 1 page = 4M in address space
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cmp dl, 0x34 ; =(USER_DMA_BUFFER - PCIe_CONFIG_SPACE) / 4M
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jb @f
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mov dl, 0x33
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mov byte[mmio_pcie_cfg_pdes-OS_BASE], dl
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@@:
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xor dx, dx ; PDEs counter
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.write_pde:
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mov dword[ebx], eax ; map 4 buses
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add bx, 4 ; new PDE
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add eax, 0x400000 ; +4M phys.
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add ecx, 0x400000 ; +4M lin.
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cmp dl, byte[mmio_pcie_cfg_pdes-OS_BASE]
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jae .pcie_cfg_mapped
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inc dl
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jmp .write_pde
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; mov eax, cr3
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; mov cr3, eax ; flush TLB
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.pcie_cfg_mapped:
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ret ; <<< OK >>>
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; ================================================================================
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org OS_BASE+$ ; back to the linear address space
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;--------------------------------------------------------------
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align 4
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rs780_read_misc:
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; in: eax(al) - reg# out: eax = NBMISCIND data
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push edx
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mov edx, NB_MISC_INDEX
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and eax, 0x07F
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mov [edx], eax
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add dl, 4
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mov eax, [edx]
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pop edx
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ret
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;-------------------------------------------
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align 4
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rs780_write_misc:
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; in: eax(al) - reg# ebx = NBMISCIND data
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push edx
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mov edx, NB_MISC_INDEX
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and eax, 0x07F
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or eax, 0x080 ; set WE
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mov [edx], eax
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add dl, 4
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mov [edx], ebx
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sub dl, 4
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xor eax, eax
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mov [edx], eax ; safety last
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pop edx
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ret
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;-------------------------------------------------------------
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align 4
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rs780_read_pcieind:
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; in: ah = bridge#, al = reg# out: eax = PCIEIND data
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push edx
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xor edx, edx
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mov ah, dl ; bridge# : 0 = Core+GFX; 0x10 = Core+SB
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and dl, 15 ; 0x20 = Core+GPP; 2..12 = a PortBridge
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shl edx, 15 ; device#
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add edx, PCIEIND_INDEX ; full bdf-address
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and eax, 0x30FF
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or al, al
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jnz @f
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shl eax, 4 ; set bits 17..16 for a Core bridge
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@@:
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mov [edx], eax
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add dl, 4
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mov eax, [edx]
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pop edx
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ret
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;-------------------------------------------
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align 4
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rs780_write_pcieind:
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; in: ah = bridge#, al = reg#, ebx = PCIEIND data
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push edx
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xor edx, edx
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mov ah, dl ; bridge# : 0 = Core+GFX; 0x10 = Core+SB
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and dl, 15 ; 0x20 = Core+GPP; 2..12 = a PortBridge
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shl edx, 15 ; device#
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add edx, PCIEIND_INDEX ; full bdf-address
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and eax, 0x30FF
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or al, al
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jnz @f
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shl eax, 4 ; set bits 17..16 for a Core bridge
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@@:
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mov [edx], eax
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add dl, 4
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mov [edx], ebx
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sub dl, 4
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xor eax, eax
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mov [edx], eax ; safety last
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pop edx
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ret
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;------------------------------------------------
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align 4
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rs780_read_htiu:
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; in: al = reg# | out: eax = HTIU data
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;------------------------------------------------
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push edx
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mov edx, HTIU_NB_INDEX
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and eax, 0x07F
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mov [edx], eax
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add dl, 4
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mov eax, [edx]
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pop edx
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ret
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;------------------------------------------------
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align 4
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rs780_write_htiu:
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; in: al = reg#; ebx = data
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;------------------------------------------------
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push edx
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mov edx, HTIU_NB_INDEX
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and eax, 0x07F
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or eax, 0x100
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mov [edx], eax
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add dl, 4
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mov [edx], ebx
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sub dl, 4
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xor eax, eax
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mov [edx], eax
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pop edx
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ret
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