mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-31 22:39:08 +09:00
![Stefan Roese](/assets/img/avatar_default.png)
This patch introduces the SDRAM scrubbing for ECC enabled board to fill/initialize the ECC bytes. This is done via the XOR engine to speed up the process. The scrubbing is a 2-stage process: 1) SPL scrubs the area 0 - 0x100.0000 (16MiB) for the main U-Boot 2) U-Boot scrubs the remaining SDRAM area(s) Signed-off-by: Stefan Roese <sr@denx.de> Cc: Luka Perkov <luka.perkov@sartura.hr>
436 lines
11 KiB
C
436 lines
11 KiB
C
/*
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* Copyright (C) Marvell International Ltd. and its affiliates
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*
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* SPDX-License-Identifier: GPL-2.0
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*/
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#include <common.h>
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#include <i2c.h>
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#include <spl.h>
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#include <asm/io.h>
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#include <asm/arch/cpu.h>
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#include <asm/arch/soc.h>
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#include "xor.h"
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#include "xor_regs.h"
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static u32 xor_regs_ctrl_backup;
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static u32 xor_regs_base_backup[MAX_CS];
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static u32 xor_regs_mask_backup[MAX_CS];
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static int mv_xor_cmd_set(u32 chan, int command);
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static int mv_xor_ctrl_set(u32 chan, u32 xor_ctrl);
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void mv_sys_xor_init(MV_DRAM_INFO *dram_info)
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{
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u32 reg, ui, base, cs_count;
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xor_regs_ctrl_backup = reg_read(XOR_WINDOW_CTRL_REG(0, 0));
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for (ui = 0; ui < MAX_CS; ui++)
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xor_regs_base_backup[ui] = reg_read(XOR_BASE_ADDR_REG(0, ui));
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for (ui = 0; ui < MAX_CS; ui++)
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xor_regs_mask_backup[ui] = reg_read(XOR_SIZE_MASK_REG(0, ui));
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reg = 0;
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for (ui = 0; ui < (dram_info->num_cs + 1); ui++) {
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/* Enable Window x for each CS */
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reg |= (0x1 << (ui));
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/* Enable Window x for each CS */
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reg |= (0x3 << ((ui * 2) + 16));
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}
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reg_write(XOR_WINDOW_CTRL_REG(0, 0), reg);
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/* Last window - Base - 0x40000000, Attribute 0x1E - SRAM */
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base = (SRAM_BASE & 0xFFFF0000) | 0x1E00;
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reg_write(XOR_BASE_ADDR_REG(0, dram_info->num_cs), base);
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/* Last window - Size - 64 MB */
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reg_write(XOR_SIZE_MASK_REG(0, dram_info->num_cs), 0x03FF0000);
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cs_count = 0;
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for (ui = 0; ui < MAX_CS; ui++) {
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if (dram_info->cs_ena & (1 << ui)) {
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/*
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* Window x - Base - 0x00000000, Attribute 0x0E - DRAM
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*/
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base = 0;
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switch (ui) {
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case 0:
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base |= 0xE00;
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break;
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case 1:
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base |= 0xD00;
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break;
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case 2:
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base |= 0xB00;
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break;
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case 3:
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base |= 0x700;
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break;
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}
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reg_write(XOR_BASE_ADDR_REG(0, cs_count), base);
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/* Window x - Size - 256 MB */
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reg_write(XOR_SIZE_MASK_REG(0, cs_count), 0x0FFF0000);
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cs_count++;
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}
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}
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mv_xor_hal_init(1);
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return;
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}
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void mv_sys_xor_finish(void)
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{
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u32 ui;
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reg_write(XOR_WINDOW_CTRL_REG(0, 0), xor_regs_ctrl_backup);
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for (ui = 0; ui < MAX_CS; ui++)
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reg_write(XOR_BASE_ADDR_REG(0, ui), xor_regs_base_backup[ui]);
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for (ui = 0; ui < MAX_CS; ui++)
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reg_write(XOR_SIZE_MASK_REG(0, ui), xor_regs_mask_backup[ui]);
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reg_write(XOR_ADDR_OVRD_REG(0, 0), 0);
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}
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/*
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* mv_xor_hal_init - Initialize XOR engine
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*
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* DESCRIPTION:
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* This function initialize XOR unit.
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* INPUT:
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* None.
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*
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* OUTPUT:
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* None.
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*
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* RETURN:
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* MV_BAD_PARAM if parameters to function invalid, MV_OK otherwise.
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*/
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void mv_xor_hal_init(u32 chan_num)
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{
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u32 i;
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/* Abort any XOR activity & set default configuration */
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for (i = 0; i < chan_num; i++) {
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mv_xor_cmd_set(i, MV_STOP);
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mv_xor_ctrl_set(i, (1 << XEXCR_REG_ACC_PROTECT_OFFS) |
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(4 << XEXCR_DST_BURST_LIMIT_OFFS) |
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(4 << XEXCR_SRC_BURST_LIMIT_OFFS));
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}
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}
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/*
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* mv_xor_ctrl_set - Set XOR channel control registers
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*
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* DESCRIPTION:
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*
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* INPUT:
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*
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* OUTPUT:
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* None.
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*
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* RETURN:
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* MV_BAD_PARAM if parameters to function invalid, MV_OK otherwise.
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* NOTE:
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* This function does not modify the OperationMode field of control register.
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*
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*/
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static int mv_xor_ctrl_set(u32 chan, u32 xor_ctrl)
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{
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u32 val;
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/* Update the XOR Engine [0..1] Configuration Registers (XExCR) */
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val = reg_read(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)))
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& XEXCR_OPERATION_MODE_MASK;
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xor_ctrl &= ~XEXCR_OPERATION_MODE_MASK;
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xor_ctrl |= val;
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reg_write(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)), xor_ctrl);
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return MV_OK;
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}
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int mv_xor_mem_init(u32 chan, u32 start_ptr, u32 block_size, u32 init_val_high,
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u32 init_val_low)
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{
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u32 tmp;
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/* Parameter checking */
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if (chan >= MV_XOR_MAX_CHAN)
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return MV_BAD_PARAM;
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if (MV_ACTIVE == mv_xor_state_get(chan))
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return MV_BUSY;
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if ((block_size < XEXBSR_BLOCK_SIZE_MIN_VALUE) ||
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(block_size > XEXBSR_BLOCK_SIZE_MAX_VALUE))
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return MV_BAD_PARAM;
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/* Set the operation mode to Memory Init */
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tmp = reg_read(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)));
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tmp &= ~XEXCR_OPERATION_MODE_MASK;
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tmp |= XEXCR_OPERATION_MODE_MEM_INIT;
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reg_write(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)), tmp);
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/*
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* Update the start_ptr field in XOR Engine [0..1] Destination Pointer
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* Register (XExDPR0)
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*/
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reg_write(XOR_DST_PTR_REG(XOR_UNIT(chan), XOR_CHAN(chan)), start_ptr);
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/*
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* Update the BlockSize field in the XOR Engine[0..1] Block Size
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* Registers (XExBSR)
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*/
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reg_write(XOR_BLOCK_SIZE_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
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block_size);
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/*
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* Update the field InitValL in the XOR Engine Initial Value Register
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* Low (XEIVRL)
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*/
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reg_write(XOR_INIT_VAL_LOW_REG(XOR_UNIT(chan)), init_val_low);
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/*
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* Update the field InitValH in the XOR Engine Initial Value Register
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* High (XEIVRH)
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*/
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reg_write(XOR_INIT_VAL_HIGH_REG(XOR_UNIT(chan)), init_val_high);
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/* Start transfer */
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reg_bit_set(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
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XEXACTR_XESTART_MASK);
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return MV_OK;
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}
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/*
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* mv_xor_transfer - Transfer data from source to destination on one of
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* three modes (XOR,CRC32,DMA)
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*
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* DESCRIPTION:
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* This function initiates XOR channel, according to function parameters,
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* in order to perform XOR or CRC32 or DMA transaction.
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* To gain maximum performance the user is asked to keep the following
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* restrictions:
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* 1) Selected engine is available (not busy).
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* 1) This module does not take into consideration CPU MMU issues.
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* In order for the XOR engine to access the appropreate source
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* and destination, address parameters must be given in system
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* physical mode.
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* 2) This API does not take care of cache coherency issues. The source,
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* destination and in case of chain the descriptor list are assumed
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* to be cache coherent.
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* 4) Parameters validity. For example, does size parameter exceeds
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* maximum byte count of descriptor mode (16M or 64K).
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*
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* INPUT:
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* chan - XOR channel number. See MV_XOR_CHANNEL enumerator.
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* xor_type - One of three: XOR, CRC32 and DMA operations.
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* xor_chain_ptr - address of chain pointer
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*
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* OUTPUT:
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* None.
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*
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* RETURS:
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* MV_BAD_PARAM if parameters to function invalid, MV_OK otherwise.
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*
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*/
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int mv_xor_transfer(u32 chan, int xor_type, u32 xor_chain_ptr)
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{
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u32 tmp;
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/* Parameter checking */
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if (chan >= MV_XOR_MAX_CHAN) {
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debug("%s: ERR. Invalid chan num %d\n", __func__, chan);
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return MV_BAD_PARAM;
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}
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if (MV_ACTIVE == mv_xor_state_get(chan)) {
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debug("%s: ERR. Channel is already active\n", __func__);
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return MV_BUSY;
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}
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if (0x0 == xor_chain_ptr) {
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debug("%s: ERR. xor_chain_ptr is NULL pointer\n", __func__);
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return MV_BAD_PARAM;
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}
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/* Read configuration register and mask the operation mode field */
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tmp = reg_read(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)));
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tmp &= ~XEXCR_OPERATION_MODE_MASK;
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switch (xor_type) {
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case MV_XOR:
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if (0 != (xor_chain_ptr & XEXDPR_DST_PTR_XOR_MASK)) {
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debug("%s: ERR. Invalid chain pointer (bits [5:0] must be cleared)\n",
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__func__);
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return MV_BAD_PARAM;
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}
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/* Set the operation mode to XOR */
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tmp |= XEXCR_OPERATION_MODE_XOR;
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break;
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case MV_DMA:
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if (0 != (xor_chain_ptr & XEXDPR_DST_PTR_DMA_MASK)) {
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debug("%s: ERR. Invalid chain pointer (bits [4:0] must be cleared)\n",
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__func__);
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return MV_BAD_PARAM;
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}
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/* Set the operation mode to DMA */
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tmp |= XEXCR_OPERATION_MODE_DMA;
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break;
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case MV_CRC32:
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if (0 != (xor_chain_ptr & XEXDPR_DST_PTR_CRC_MASK)) {
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debug("%s: ERR. Invalid chain pointer (bits [4:0] must be cleared)\n",
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__func__);
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return MV_BAD_PARAM;
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}
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/* Set the operation mode to CRC32 */
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tmp |= XEXCR_OPERATION_MODE_CRC;
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break;
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default:
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return MV_BAD_PARAM;
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}
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/* Write the operation mode to the register */
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reg_write(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)), tmp);
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/*
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* Update the NextDescPtr field in the XOR Engine [0..1] Next Descriptor
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* Pointer Register (XExNDPR)
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*/
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reg_write(XOR_NEXT_DESC_PTR_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
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xor_chain_ptr);
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/* Start transfer */
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reg_bit_set(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
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XEXACTR_XESTART_MASK);
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return MV_OK;
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}
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/*
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* mv_xor_state_get - Get XOR channel state.
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*
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* DESCRIPTION:
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* XOR channel activity state can be active, idle, paused.
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* This function retrunes the channel activity state.
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*
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* INPUT:
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* chan - the channel number
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*
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* OUTPUT:
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* None.
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*
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* RETURN:
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* XOR_CHANNEL_IDLE - If the engine is idle.
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* XOR_CHANNEL_ACTIVE - If the engine is busy.
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* XOR_CHANNEL_PAUSED - If the engine is paused.
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* MV_UNDEFINED_STATE - If the engine state is undefind or there is no
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* such engine
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*
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*/
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int mv_xor_state_get(u32 chan)
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{
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u32 state;
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/* Parameter checking */
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if (chan >= MV_XOR_MAX_CHAN) {
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debug("%s: ERR. Invalid chan num %d\n", __func__, chan);
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return MV_UNDEFINED_STATE;
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}
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/* Read the current state */
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state = reg_read(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)));
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state &= XEXACTR_XESTATUS_MASK;
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/* Return the state */
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switch (state) {
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case XEXACTR_XESTATUS_IDLE:
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return MV_IDLE;
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case XEXACTR_XESTATUS_ACTIVE:
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return MV_ACTIVE;
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case XEXACTR_XESTATUS_PAUSED:
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return MV_PAUSED;
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}
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return MV_UNDEFINED_STATE;
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}
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/*
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* mv_xor_cmd_set - Set command of XOR channel
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*
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* DESCRIPTION:
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* XOR channel can be started, idle, paused and restarted.
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* Paused can be set only if channel is active.
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* Start can be set only if channel is idle or paused.
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* Restart can be set only if channel is paused.
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* Stop can be set only if channel is active.
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*
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* INPUT:
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* chan - The channel number
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* command - The command type (start, stop, restart, pause)
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*
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* OUTPUT:
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* None.
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*
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* RETURN:
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* MV_OK on success , MV_BAD_PARAM on erroneous parameter, MV_ERROR on
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* undefind XOR engine mode
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*
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*/
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static int mv_xor_cmd_set(u32 chan, int command)
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{
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int state;
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/* Parameter checking */
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if (chan >= MV_XOR_MAX_CHAN) {
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debug("%s: ERR. Invalid chan num %d\n", __func__, chan);
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return MV_BAD_PARAM;
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}
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/* Get the current state */
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state = mv_xor_state_get(chan);
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/* Command is start and current state is idle */
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if ((command == MV_START) && (state == MV_IDLE)) {
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reg_bit_set(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
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XEXACTR_XESTART_MASK);
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return MV_OK;
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}
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/* Command is stop and current state is active */
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else if ((command == MV_STOP) && (state == MV_ACTIVE)) {
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reg_bit_set(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
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XEXACTR_XESTOP_MASK);
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return MV_OK;
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}
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/* Command is paused and current state is active */
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else if ((command == MV_PAUSED) && (state == MV_ACTIVE)) {
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reg_bit_set(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
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XEXACTR_XEPAUSE_MASK);
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return MV_OK;
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}
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/* Command is restart and current state is paused */
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else if ((command == MV_RESTART) && (state == MV_PAUSED)) {
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reg_bit_set(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
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XEXACTR_XERESTART_MASK);
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return MV_OK;
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}
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/* Command is stop and current state is active */
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else if ((command == MV_STOP) && (state == MV_IDLE))
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return MV_OK;
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/* Illegal command */
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debug("%s: ERR. Illegal command\n", __func__);
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return MV_BAD_PARAM;
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}
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