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#
# Copyright (c) 2011, ARM Limited. All rights reserved.
#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
# http:#opensource.org/licenses/bsd-license.php
#
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#
#
#include <AsmMacroIoLib.h>
#include <Library/PcdLib.h>
#include <AutoGen.h>
#include <Drivers/PL35xSmc.h>
.text
#Maintain 8 byte alignment
.align 3
GCC_ASM_EXPORT(SMCInitializeNOR)
GCC_ASM_EXPORT(SMCInitializeSRAM)
GCC_ASM_EXPORT(SMCInitializePeripherals)
GCC_ASM_EXPORT(SMCInitializeVRAM)
# CS0 CS0-Interf0 NOR1 flash on the motherboard
# CS1 CS1-Interf0 Reserved for the motherboard
# CS2 CS2-Interf0 SRAM on the motherboard
# CS3 CS3-Interf0 memory-mapped Ethernet and USB controllers on the motherboard
# CS4 CS0-Interf1 NOR2 flash on the motherboard
# CS5 CS1-Interf1 memory-mapped peripherals
# CS6 CS2-Interf1 memory-mapped peripherals
# CS7 CS3-Interf1 system memory-mapped peripherals on the motherboard.
// IN r1 SmcBase
// IN r2 ChipSelect
// NOTE: This code is been called before any stack has been setup. It means some registers
// could be overwritten (case of 'r0')
ASM_PFX(SMCInitializeNOR):
#
# Setup NOR1 (CS0-Interface0)
#
# Write to set_cycle register(holding register for NOR 1 cycle register or NAND cycle register)
#Read cycle timeout = 0xA (0:3)
#Write cycle timeout = 0x3(7:4)
#OE Assertion Delay = 0x9(11:8)
#WE Assertion delay = 0x3(15:12)
#Page cycle timeout = 0x2(19:16)
LoadConstantToReg (0x0002393A,r0) @ldr r0, = 0x0002393A
str r0, [r1, #PL354_SMC_SET_CYCLES_OFFSET]
# Write to set_opmode register(holding register for NOR 1 opomode register or NAND opmode register)
# 0x00000002 = MemoryWidth: 32bit
# 0x00000028 = ReadMemoryBurstLength:continuous
# 0x00000280 = WriteMemoryBurstLength:continuous
# 0x00000800 = Set Address Valid
LoadConstantToReg (0x00000AAA,r0) @ldr r0, = 0x00000AAA
str r0, [r1, #PL354_SMC_SET_OPMODE_OFFSET]
# Write to direct_cmd register so that the NOR 1 registers(set-cycles and opmode) are updated with holding registers
# 0x00000000 = ChipSelect0-Interface 0
# 0x00400000 = CmdTypes: UpdateRegs
LoadConstantToReg (0x00400000,r0) @ldr r0, = 0x00400000
str r0, [r1, #PL354_SMC_DIRECT_CMD_OFFSET]
bx lr
ASM_PFX(SMCInitializeSRAM):
#
# Setup SRAM (CS2-Interface0)
#
LoadConstantToReg (0x00027158,r0) @ldr r0, = 0x00027158
str r0, [r1, #PL354_SMC_SET_CYCLES_OFFSET]
# 0x00000002 = MemoryWidth: 32bit
# 0x00000800 = Set Address Valid
LoadConstantToReg (0x00000802,r0) @ldr r0, = 0x00000802
str r0, [r1, #PL354_SMC_SET_OPMODE_OFFSET]
# 0x01000000 = ChipSelect2-Interface 0
# 0x00400000 = CmdTypes: UpdateRegs
LoadConstantToReg (0x01400000,r0) @ldr r0, = 0x01400000
str r0, [r1, #PL354_SMC_DIRECT_CMD_OFFSET]
bx lr
ASM_PFX(SMCInitializePeripherals):
#
# USB/Eth/VRAM (CS3-Interface0)
#
LoadConstantToReg (0x000CD2AA,r0) @ldr r0, = 0x000CD2AA
str r0, [r1, #PL354_SMC_SET_CYCLES_OFFSET]
# 0x00000002 = MemoryWidth: 32bit
# 0x00000004 = Memory reads are synchronous
# 0x00000040 = Memory writes are synchronous
LoadConstantToReg (0x00000046,r0) @ldr r0, = 0x00000046
str r0, [r1, #PL354_SMC_SET_OPMODE_OFFSET]
# 0x01800000 = ChipSelect3-Interface 0
# 0x00400000 = CmdTypes: UpdateRegs
LoadConstantToReg (0x01C00000,r0) @ldr r0, = 0x01C00000
str r0, [r1, #PL354_SMC_DIRECT_CMD_OFFSET]
#
# Setup NOR3 (CS0-Interface1)
#
LoadConstantToReg (0x0002393A,r0) @ldr r0, = 0x0002393A
str r0, [r1, #PL354_SMC_SET_CYCLES_OFFSET]
# 0x00000002 = MemoryWidth: 32bit
# 0x00000028 = ReadMemoryBurstLength:continuous
# 0x00000280 = WriteMemoryBurstLength:continuous
# 0x00000800 = Set Address Valid
LoadConstantToReg (0x00000AAA,r0) @ldr r0, = 0x00000AAA
str r0, [r1, #PL354_SMC_SET_OPMODE_OFFSET]
# 0x02000000 = ChipSelect0-Interface 1
# 0x00400000 = CmdTypes: UpdateRegs
LoadConstantToReg (0x02400000,r0) @ldr r0, = 0x02400000
str r0, [r1, #PL354_SMC_DIRECT_CMD_OFFSET]
#
# Setup Peripherals (CS3-Interface1)
#
LoadConstantToReg (0x00025156,r0) @ldr r0, = 0x00025156
str r0, [r1, #PL354_SMC_SET_CYCLES_OFFSET]
# 0x00000002 = MemoryWidth: 32bit
# 0x00000004 = Memory reads are synchronous
# 0x00000040 = Memory writes are synchronous
LoadConstantToReg (0x00000046,r0) @ldr r0, = 0x00000046
str r0, [r1, #PL354_SMC_SET_OPMODE_OFFSET]
# 0x03800000 = ChipSelect3-Interface 1
# 0x00400000 = CmdTypes: UpdateRegs
LoadConstantToReg (0x03C00000,r0) @ldr r0, = 0x03C00000
str r0, [r1, #PL354_SMC_DIRECT_CMD_OFFSET]
bx lr
// IN r1 SmcBase
// IN r2 VideoSRamBase
// NOTE: This code is been called before any stack has been setup. It means some registers
// could be overwritten (case of 'r0')
ASM_PFX(SMCInitializeVRAM):
#
# Setup VRAM (CS1-Interface0)
#
LoadConstantToReg (0x00049249,r0) @ldr r0, = 0x00049249
str r0, [r1, #PL354_SMC_SET_CYCLES_OFFSET]
# 0x00000002 = MemoryWidth: 32bit
# 0x00000004 = Memory reads are synchronous
# 0x00000040 = Memory writes are synchronous
LoadConstantToReg (0x00000046,r0) @ldr r0, = 0x00000046
str r0, [r1, #PL354_SMC_SET_OPMODE_OFFSET]
# 0x00800000 = ChipSelect1-Interface 0
# 0x00400000 = CmdTypes: UpdateRegs
LoadConstantToReg (0x00C00000,r0) @ldr r0, = 0x00C00000
str r0, [r1, #PL354_SMC_DIRECT_CMD_OFFSET]
#
# Page mode setup for VRAM
#
#read current state
ldr r0, [r2, #0]
ldr r0, [r2, #0]
LoadConstantToReg (0x00000000,r0) @ldr r0, = 0x00000000
str r0, [r2, #0]
ldr r0, [r2, #0]
#enable page mode
ldr r0, [r2, #0]
ldr r0, [r2, #0]
LoadConstantToReg (0x00000000,r0) @ldr r0, = 0x00000000
str r0, [r2, #0]
LoadConstantToReg (0x00900090,r0) @ldr r0, = 0x00900090
str r0, [r2, #0]
#confirm page mode enabled
ldr r0, [r2, #0]
ldr r0, [r2, #0]
LoadConstantToReg (0x00000000,r0) @ldr r0, = 0x00000000
str r0, [r2, #0]
ldr r0, [r2, #0]
bx lr
ASM_FUNCTION_REMOVE_IF_UNREFERENCED
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