b37e6bc8c1
Change all lcd drivers to using a pointer to the static framebuffer instead of directly accessing the static array. This will let us later do fun things like dynamic framebuffer sizes (RaaA) or ability to use different buffers for different layers (dynamic skin backdrops!) Change-Id: I0a4d58a9d7b55e6c932131b929e5d4c9f9414b06
221 lines
6.1 KiB
C
221 lines
6.1 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2008 by Maurus Cuelenaere
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <sys/types.h> /* off_t */
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#include "config.h"
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#include "jz4740.h"
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#include "lcd.h"
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#include "lcd-target.h"
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#include "system.h"
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#include "kernel.h"
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/*
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Warning: code behaviour is unpredictable when switch_thread() gets called in IRQ mode!
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So don't update the LCD in an interrupt handler!
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*/
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static volatile bool lcd_is_on = false;
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static struct mutex lcd_mtx;
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static struct semaphore lcd_wkup;
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static int lcd_count = 0;
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void lcd_clock_enable(void)
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{
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if(++lcd_count == 1)
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__cpm_start_lcd();
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}
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void lcd_clock_disable(void)
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{
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if(--lcd_count == 0)
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__cpm_stop_lcd();
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}
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/* LCD init */
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void lcd_init_device(void)
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{
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lcd_init_controller();
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lcd_is_on = true;
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mutex_init(&lcd_mtx);
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semaphore_init(&lcd_wkup, 1, 0);
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system_enable_irq(DMA_IRQ(DMA_LCD_CHANNEL));
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}
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#ifdef HAVE_LCD_ENABLE
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void lcd_enable(bool state)
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{
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if(lcd_is_on == state)
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return;
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if(state)
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{
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lcd_on();
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send_event(LCD_EVENT_ACTIVATION, NULL);
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}
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else
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lcd_off();
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lcd_is_on = state;
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}
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#endif
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bool lcd_active(void)
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{
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return lcd_is_on;
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}
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/* Update a fraction of the display. */
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void lcd_update_rect(int x, int y, int width, int height)
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{
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/* Currently only do updates with full LCD width.
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* DMA can't handle full partial updates and CPU is too slow compared
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* to DMA updates */
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x = 0;
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width = LCD_WIDTH;
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mutex_lock(&lcd_mtx);
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lcd_clock_enable();
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lcd_set_target(x, y, width, height);
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dma_enable();
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REG_DMAC_DCCSR(DMA_LCD_CHANNEL) = DMAC_DCCSR_NDES;
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REG_DMAC_DSAR(DMA_LCD_CHANNEL) = PHYSADDR((unsigned long)FBADDR(x,y));
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REG_DMAC_DRSR(DMA_LCD_CHANNEL) = DMAC_DRSR_RS_SLCD;
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REG_DMAC_DTAR(DMA_LCD_CHANNEL) = PHYSADDR(SLCD_FIFO);
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REG_DMAC_DTCR(DMA_LCD_CHANNEL) = (width * height) >> 3;
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REG_DMAC_DCMD(DMA_LCD_CHANNEL) = ( DMAC_DCMD_SAI | DMAC_DCMD_RDIL_IGN | DMAC_DCMD_SWDH_32
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| DMAC_DCMD_DWDH_16 | DMAC_DCMD_DS_16BYTE );
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__dcache_writeback_all(); /* Size of framebuffer is way bigger than cache size.
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We need to find a way to make the framebuffer uncached, so this statement can get removed. */
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while(REG_SLCD_STATE & SLCD_STATE_BUSY);
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REG_SLCD_CTRL |= SLCD_CTRL_DMA_EN; /* Enable SLCD DMA support */
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REG_DMAC_DCCSR(DMA_LCD_CHANNEL) |= DMAC_DCCSR_EN; /* Enable DMA channel */
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REG_DMAC_DCMD(DMA_LCD_CHANNEL) |= DMAC_DCMD_TIE; /* Enable DMA interrupt */
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semaphore_wait(&lcd_wkup, TIMEOUT_BLOCK); /* Sleeping in lcd_update() should be safe */
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REG_DMAC_DCCSR(DMA_LCD_CHANNEL) &= ~DMAC_DCCSR_EN; /* Disable DMA channel */
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dma_disable();
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while(REG_SLCD_STATE & SLCD_STATE_BUSY);
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REG_SLCD_CTRL &= ~SLCD_CTRL_DMA_EN; /* Disable SLCD DMA support */
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lcd_clock_disable();
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mutex_unlock(&lcd_mtx);
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}
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void DMA_CALLBACK(DMA_LCD_CHANNEL)(void)
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{
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if (REG_DMAC_DCCSR(DMA_LCD_CHANNEL) & DMAC_DCCSR_HLT)
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REG_DMAC_DCCSR(DMA_LCD_CHANNEL) &= ~DMAC_DCCSR_HLT;
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if (REG_DMAC_DCCSR(DMA_LCD_CHANNEL) & DMAC_DCCSR_AR)
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REG_DMAC_DCCSR(DMA_LCD_CHANNEL) &= ~DMAC_DCCSR_AR;
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if (REG_DMAC_DCCSR(DMA_LCD_CHANNEL) & DMAC_DCCSR_CT)
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REG_DMAC_DCCSR(DMA_LCD_CHANNEL) &= ~DMAC_DCCSR_CT;
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if (REG_DMAC_DCCSR(DMA_LCD_CHANNEL) & DMAC_DCCSR_TT)
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REG_DMAC_DCCSR(DMA_LCD_CHANNEL) &= ~DMAC_DCCSR_TT;
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semaphore_release(&lcd_wkup);
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}
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/* Update the display.
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This must be called after all other LCD functions that change the display. */
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void lcd_update(void)
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{
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if(!lcd_is_on)
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return;
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lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
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}
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/* (Mis)use LCD framebuffer as a temporary buffer */
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void lcd_blit_yuv(unsigned char * const src[3],
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int src_x, int src_y, int stride,
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int x, int y, int width, int height)
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{
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unsigned char const * yuv_src[3];
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register off_t z;
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if(!lcd_is_on)
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return;
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z = stride * src_y;
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yuv_src[0] = src[0] + z + src_x;
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yuv_src[1] = src[1] + (z >> 2) + (src_x >> 1);
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yuv_src[2] = src[2] + (yuv_src[1] - src[1]);
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__dcache_writeback_all();
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__cpm_start_ipu();
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IPU_STOP_IPU();
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IPU_RESET_IPU();
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IPU_CLEAR_END_FLAG();
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IPU_DISABLE_RSIZE();
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IPU_DISABLE_IRQ();
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IPU_SET_INFMT(INFMT_YUV420);
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IPU_SET_OUTFMT(OUTFMT_RGB565);
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IPU_SET_IN_FM(width, height);
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IPU_SET_Y_STRIDE(stride);
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IPU_SET_UV_STRIDE(stride, stride);
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IPU_SET_Y_ADDR(PHYSADDR((unsigned long)yuv_src[0]));
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IPU_SET_U_ADDR(PHYSADDR((unsigned long)yuv_src[1]));
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IPU_SET_V_ADDR(PHYSADDR((unsigned long)yuv_src[2]));
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IPU_SET_OUT_ADDR(PHYSADDR((unsigned long)FBADDR(y,x)));
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IPU_SET_OUT_FM(height, width);
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IPU_SET_OUT_STRIDE(height);
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IPU_SET_CSC_C0_COEF(YUV_CSC_C0);
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IPU_SET_CSC_C1_COEF(YUV_CSC_C1);
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IPU_SET_CSC_C2_COEF(YUV_CSC_C2);
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IPU_SET_CSC_C3_COEF(YUV_CSC_C3);
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IPU_SET_CSC_C4_COEF(YUV_CSC_C4);
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IPU_RUN_IPU();
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while(!(IPU_POLLING_END_FLAG()) && IPU_IS_ENABLED());
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IPU_CLEAR_END_FLAG();
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IPU_STOP_IPU();
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IPU_RESET_IPU();
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__cpm_stop_ipu();
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/* YUV speed is limited by LCD speed */
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lcd_update_rect(y, x, height, width);
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}
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