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Commit 01a6221a authored by David Daney's avatar David Daney Committed by Ralf Baechle
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MIPS: Reorganize Cavium OCTEON PCI support. 

Move the cavium PCI files to the arch/mips/pci directory.  Also cleanup
comment formatting and code layout.  Code from pci-common.c, was moved
into other files.
Signed-off-by: default avatarDavid Daney <ddaney@caviumnetworks.com>
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent ada8e951
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Showing with 197 additions and 221 deletions
arch/mips/cavium-octeon/Makefile
View file @ 01a6221a
......@@ -14,9 +14,5 @@ obj-y += dma-octeon.o flash_setup.o
obj-y += octeon-memcpy.o
obj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_PCI) += pci-common.o
obj-$(CONFIG_PCI) += pci.o
obj-$(CONFIG_PCI) += pcie.o
obj-$(CONFIG_PCI_MSI) += msi.o
EXTRA_CFLAGS += -Werror
arch/mips/cavium-octeon/dma-octeon.c
View file @ 01a6221a
......@@ -29,7 +29,7 @@
#include <dma-coherence.h>
#ifdef CONFIG_PCI
#include "pci-common.h"
#include <asm/octeon/pci-octeon.h>
#endif
#define BAR2_PCI_ADDRESS 0x8000000000ul
......
arch/mips/cavium-octeon/pci-common.c deleted 100644 → 0
View file @ ada8e951
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2005-2007 Cavium Networks
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/time.h>
#include <linux/delay.h>
#include "pci-common.h"
typeof(pcibios_map_irq) *octeon_pcibios_map_irq;
enum octeon_dma_bar_type octeon_dma_bar_type = OCTEON_DMA_BAR_TYPE_INVALID;
/**
* Map a PCI device to the appropriate interrupt line
*
* @param dev The Linux PCI device structure for the device to map
* @param slot The slot number for this device on __BUS 0__. Linux
* enumerates through all the bridges and figures out the
* slot on Bus 0 where this device eventually hooks to.
* @param pin The PCI interrupt pin read from the device, then swizzled
* as it goes through each bridge.
* @return Interrupt number for the device
*/
int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
if (octeon_pcibios_map_irq)
return octeon_pcibios_map_irq(dev, slot, pin);
else
panic("octeon_pcibios_map_irq doesn't point to a "
"pcibios_map_irq() function");
}
/**
* Called to perform platform specific PCI setup
*
* @param dev
* @return
*/
int pcibios_plat_dev_init(struct pci_dev *dev)
{
uint16_t config;
uint32_t dconfig;
int pos;
/*
* Force the Cache line setting to 64 bytes. The standard
* Linux bus scan doesn't seem to set it. Octeon really has
* 128 byte lines, but Intel bridges get really upset if you
* try and set values above 64 bytes. Value is specified in
* 32bit words.
*/
pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 64 / 4);
/* Set latency timers for all devices */
pci_write_config_byte(dev, PCI_LATENCY_TIMER, 48);
/* Enable reporting System errors and parity errors on all devices */
/* Enable parity checking and error reporting */
pci_read_config_word(dev, PCI_COMMAND, &config);
config |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
pci_write_config_word(dev, PCI_COMMAND, config);
if (dev->subordinate) {
/* Set latency timers on sub bridges */
pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER, 48);
/* More bridge error detection */
pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &config);
config |= PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_SERR;
pci_write_config_word(dev, PCI_BRIDGE_CONTROL, config);
}
/* Enable the PCIe normal error reporting */
pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
if (pos) {
/* Update Device Control */
pci_read_config_word(dev, pos + PCI_EXP_DEVCTL, &config);
/* Correctable Error Reporting */
config |= PCI_EXP_DEVCTL_CERE;
/* Non-Fatal Error Reporting */
config |= PCI_EXP_DEVCTL_NFERE;
/* Fatal Error Reporting */
config |= PCI_EXP_DEVCTL_FERE;
/* Unsupported Request */
config |= PCI_EXP_DEVCTL_URRE;
pci_write_config_word(dev, pos + PCI_EXP_DEVCTL, config);
}
/* Find the Advanced Error Reporting capability */
pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
if (pos) {
/* Clear Uncorrectable Error Status */
pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS,
&dconfig);
pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS,
dconfig);
/* Enable reporting of all uncorrectable errors */
/* Uncorrectable Error Mask - turned on bits disable errors */
pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_MASK, 0);
/*
* Leave severity at HW default. This only controls if
* errors are reported as uncorrectable or
* correctable, not if the error is reported.
*/
/* PCI_ERR_UNCOR_SEVER - Uncorrectable Error Severity */
/* Clear Correctable Error Status */
pci_read_config_dword(dev, pos + PCI_ERR_COR_STATUS, &dconfig);
pci_write_config_dword(dev, pos + PCI_ERR_COR_STATUS, dconfig);
/* Enable reporting of all correctable errors */
/* Correctable Error Mask - turned on bits disable errors */
pci_write_config_dword(dev, pos + PCI_ERR_COR_MASK, 0);
/* Advanced Error Capabilities */
pci_read_config_dword(dev, pos + PCI_ERR_CAP, &dconfig);
/* ECRC Generation Enable */
if (config & PCI_ERR_CAP_ECRC_GENC)
config |= PCI_ERR_CAP_ECRC_GENE;
/* ECRC Check Enable */
if (config & PCI_ERR_CAP_ECRC_CHKC)
config |= PCI_ERR_CAP_ECRC_CHKE;
pci_write_config_dword(dev, pos + PCI_ERR_CAP, dconfig);
/* PCI_ERR_HEADER_LOG - Header Log Register (16 bytes) */
/* Report all errors to the root complex */
pci_write_config_dword(dev, pos + PCI_ERR_ROOT_COMMAND,
PCI_ERR_ROOT_CMD_COR_EN |
PCI_ERR_ROOT_CMD_NONFATAL_EN |
PCI_ERR_ROOT_CMD_FATAL_EN);
/* Clear the Root status register */
pci_read_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, &dconfig);
pci_write_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, dconfig);
}
return 0;
}
arch/mips/cavium-octeon/pci-common.h → arch/mips/include/asm/octeon/pci-octeon.h
View file @ 01a6221a
......@@ -3,23 +3,29 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2005-2007 Cavium Networks
* Copyright (C) 2005-2009 Cavium Networks
*/
#ifndef __OCTEON_PCI_COMMON_H__
#define __OCTEON_PCI_COMMON_H__
#ifndef __PCI_OCTEON_H__
#define __PCI_OCTEON_H__
#include <linux/pci.h>
/* Some PCI cards require delays when accessing config space. */
#define PCI_CONFIG_SPACE_DELAY 10000
/* pcibios_map_irq() is defined inside pci-common.c. All it does is call the
Octeon specific version pointed to by this variable. This function needs to
change for PCI or PCIe based hosts */
extern typeof(pcibios_map_irq) *octeon_pcibios_map_irq;
/*
* pcibios_map_irq() is defined inside pci-octeon.c. All it does is
* call the Octeon specific version pointed to by this variable. This
* function needs to change for PCI or PCIe based hosts.
*/
extern int (*octeon_pcibios_map_irq)(const struct pci_dev *dev,
u8 slot, u8 pin);
/* The following defines are only used when octeon_dma_bar_type =
OCTEON_DMA_BAR_TYPE_BIG */
/*
* The following defines are used when octeon_dma_bar_type =
* OCTEON_DMA_BAR_TYPE_BIG
*/
#define OCTEON_PCI_BAR1_HOLE_BITS 5
#define OCTEON_PCI_BAR1_HOLE_SIZE (1ul<<(OCTEON_PCI_BAR1_HOLE_BITS+3))
......@@ -30,9 +36,9 @@ enum octeon_dma_bar_type {
OCTEON_DMA_BAR_TYPE_PCIE
};
/**
* This is a variable to tell the DMA mapping system in dma-octeon.c
* how to map PCI DMA addresses.
/*
* This tells the DMA mapping system in dma-octeon.c how to map PCI
* DMA addresses.
*/
extern enum octeon_dma_bar_type octeon_dma_bar_type;
......
arch/mips/pci/Makefile
View file @ 01a6221a
......@@ -52,3 +52,8 @@ obj-$(CONFIG_VICTOR_MPC30X) += fixup-mpc30x.o
obj-$(CONFIG_ZAO_CAPCELLA) += fixup-capcella.o
obj-$(CONFIG_WR_PPMC) += fixup-wrppmc.o
obj-$(CONFIG_MIKROTIK_RB532) += pci-rc32434.o ops-rc32434.o fixup-rc32434.o
obj-$(CONFIG_CPU_CAVIUM_OCTEON) += pci-octeon.o pcie-octeon.o
ifdef CONFIG_PCI_MSI
obj-$(CONFIG_CPU_CAVIUM_OCTEON) += msi-octeon.o
endif
arch/mips/cavium-octeon/msi.c → arch/mips/pci/msi-octeon.c
View file @ 01a6221a
......@@ -3,7 +3,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2005-2007 Cavium Networks
* Copyright (C) 2005-2009 Cavium Networks
*/
#include <linux/kernel.h>
#include <linux/init.h>
......@@ -16,8 +16,7 @@
#include <asm/octeon/cvmx-pci-defs.h>
#include <asm/octeon/cvmx-npei-defs.h>
#include <asm/octeon/cvmx-pexp-defs.h>
#include "pci-common.h"
#include <asm/octeon/pci-octeon.h>
/*
* Each bit in msi_free_irq_bitmask represents a MSI interrupt that is
......@@ -47,8 +46,8 @@ static DEFINE_SPINLOCK(msi_free_irq_bitmask_lock);
* programming the MSI control bits [6:4] before calling
* pci_enable_msi().
*
* @param dev Device requesting MSI interrupts
* @param desc MSI descriptor
* @dev: Device requesting MSI interrupts
* @desc: MSI descriptor
*
* Returns 0 on success.
*/
......@@ -213,14 +212,9 @@ void arch_teardown_msi_irq(unsigned int irq)
}
/**
/*
* Called by the interrupt handling code when an MSI interrupt
* occurs.
*
* @param cpl
* @param dev_id
*
* @return
*/
static irqreturn_t octeon_msi_interrupt(int cpl, void *dev_id)
{
......@@ -256,31 +250,37 @@ static irqreturn_t octeon_msi_interrupt(int cpl, void *dev_id)
}
/**
/*
* Initializes the MSI interrupt handling code
*
* @return
*/
int octeon_msi_initialize(void)
{
int r;
if (octeon_has_feature(OCTEON_FEATURE_PCIE)) {
r = request_irq(OCTEON_IRQ_PCI_MSI0, octeon_msi_interrupt,
if (request_irq(OCTEON_IRQ_PCI_MSI0, octeon_msi_interrupt,
IRQF_SHARED,
"MSI[0:63]", octeon_msi_interrupt);
"MSI[0:63]", octeon_msi_interrupt))
panic("request_irq(OCTEON_IRQ_PCI_MSI0) failed");
} else if (octeon_is_pci_host()) {
r = request_irq(OCTEON_IRQ_PCI_MSI0, octeon_msi_interrupt,
if (request_irq(OCTEON_IRQ_PCI_MSI0, octeon_msi_interrupt,
IRQF_SHARED,
"MSI[0:15]", octeon_msi_interrupt);
r += request_irq(OCTEON_IRQ_PCI_MSI1, octeon_msi_interrupt,
IRQF_SHARED,
"MSI[16:31]", octeon_msi_interrupt);
r += request_irq(OCTEON_IRQ_PCI_MSI2, octeon_msi_interrupt,
IRQF_SHARED,
"MSI[32:47]", octeon_msi_interrupt);
r += request_irq(OCTEON_IRQ_PCI_MSI3, octeon_msi_interrupt,
IRQF_SHARED,
"MSI[48:63]", octeon_msi_interrupt);
"MSI[0:15]", octeon_msi_interrupt))
panic("request_irq(OCTEON_IRQ_PCI_MSI0) failed");
if (request_irq(OCTEON_IRQ_PCI_MSI1, octeon_msi_interrupt,
IRQF_SHARED,
"MSI[16:31]", octeon_msi_interrupt))
panic("request_irq(OCTEON_IRQ_PCI_MSI1) failed");
if (request_irq(OCTEON_IRQ_PCI_MSI2, octeon_msi_interrupt,
IRQF_SHARED,
"MSI[32:47]", octeon_msi_interrupt))
panic("request_irq(OCTEON_IRQ_PCI_MSI2) failed");
if (request_irq(OCTEON_IRQ_PCI_MSI3, octeon_msi_interrupt,
IRQF_SHARED,
"MSI[48:63]", octeon_msi_interrupt))
panic("request_irq(OCTEON_IRQ_PCI_MSI3) failed");
}
return 0;
}
......
arch/mips/cavium-octeon/pci.c → arch/mips/pci/pci-octeon.c
View file @ 01a6221a
......@@ -3,7 +3,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2005-2007 Cavium Networks
* Copyright (C) 2005-2009 Cavium Networks
*/
#include <linux/kernel.h>
#include <linux/init.h>
......@@ -17,8 +17,7 @@
#include <asm/octeon/octeon.h>
#include <asm/octeon/cvmx-npi-defs.h>
#include <asm/octeon/cvmx-pci-defs.h>
#include "pci-common.h"
#include <asm/octeon/pci-octeon.h>
#define USE_OCTEON_INTERNAL_ARBITER
......@@ -54,6 +53,126 @@ union octeon_pci_address {
} s;
};
int __initdata (*octeon_pcibios_map_irq)(const struct pci_dev *dev,
u8 slot, u8 pin);
enum octeon_dma_bar_type octeon_dma_bar_type = OCTEON_DMA_BAR_TYPE_INVALID;
/**
* Map a PCI device to the appropriate interrupt line
*
* @dev: The Linux PCI device structure for the device to map
* @slot: The slot number for this device on __BUS 0__. Linux
* enumerates through all the bridges and figures out the
* slot on Bus 0 where this device eventually hooks to.
* @pin: The PCI interrupt pin read from the device, then swizzled
* as it goes through each bridge.
* Returns Interrupt number for the device
*/
int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
if (octeon_pcibios_map_irq)
return octeon_pcibios_map_irq(dev, slot, pin);
else
panic("octeon_pcibios_map_irq not set.");
}
/*
* Called to perform platform specific PCI setup
*/
int pcibios_plat_dev_init(struct pci_dev *dev)
{
uint16_t config;
uint32_t dconfig;
int pos;
/*
* Force the Cache line setting to 64 bytes. The standard
* Linux bus scan doesn't seem to set it. Octeon really has
* 128 byte lines, but Intel bridges get really upset if you
* try and set values above 64 bytes. Value is specified in
* 32bit words.
*/
pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 64 / 4);
/* Set latency timers for all devices */
pci_write_config_byte(dev, PCI_LATENCY_TIMER, 48);
/* Enable reporting System errors and parity errors on all devices */
/* Enable parity checking and error reporting */
pci_read_config_word(dev, PCI_COMMAND, &config);
config |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
pci_write_config_word(dev, PCI_COMMAND, config);
if (dev->subordinate) {
/* Set latency timers on sub bridges */
pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER, 48);
/* More bridge error detection */
pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &config);
config |= PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_SERR;
pci_write_config_word(dev, PCI_BRIDGE_CONTROL, config);
}
/* Enable the PCIe normal error reporting */
pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
if (pos) {
/* Update Device Control */
pci_read_config_word(dev, pos + PCI_EXP_DEVCTL, &config);
/* Correctable Error Reporting */
config |= PCI_EXP_DEVCTL_CERE;
/* Non-Fatal Error Reporting */
config |= PCI_EXP_DEVCTL_NFERE;
/* Fatal Error Reporting */
config |= PCI_EXP_DEVCTL_FERE;
/* Unsupported Request */
config |= PCI_EXP_DEVCTL_URRE;
pci_write_config_word(dev, pos + PCI_EXP_DEVCTL, config);
}
/* Find the Advanced Error Reporting capability */
pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
if (pos) {
/* Clear Uncorrectable Error Status */
pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS,
&dconfig);
pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS,
dconfig);
/* Enable reporting of all uncorrectable errors */
/* Uncorrectable Error Mask - turned on bits disable errors */
pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_MASK, 0);
/*
* Leave severity at HW default. This only controls if
* errors are reported as uncorrectable or
* correctable, not if the error is reported.
*/
/* PCI_ERR_UNCOR_SEVER - Uncorrectable Error Severity */
/* Clear Correctable Error Status */
pci_read_config_dword(dev, pos + PCI_ERR_COR_STATUS, &dconfig);
pci_write_config_dword(dev, pos + PCI_ERR_COR_STATUS, dconfig);
/* Enable reporting of all correctable errors */
/* Correctable Error Mask - turned on bits disable errors */
pci_write_config_dword(dev, pos + PCI_ERR_COR_MASK, 0);
/* Advanced Error Capabilities */
pci_read_config_dword(dev, pos + PCI_ERR_CAP, &dconfig);
/* ECRC Generation Enable */
if (config & PCI_ERR_CAP_ECRC_GENC)
config |= PCI_ERR_CAP_ECRC_GENE;
/* ECRC Check Enable */
if (config & PCI_ERR_CAP_ECRC_CHKC)
config |= PCI_ERR_CAP_ECRC_CHKE;
pci_write_config_dword(dev, pos + PCI_ERR_CAP, dconfig);
/* PCI_ERR_HEADER_LOG - Header Log Register (16 bytes) */
/* Report all errors to the root complex */
pci_write_config_dword(dev, pos + PCI_ERR_ROOT_COMMAND,
PCI_ERR_ROOT_CMD_COR_EN |
PCI_ERR_ROOT_CMD_NONFATAL_EN |
PCI_ERR_ROOT_CMD_FATAL_EN);
/* Clear the Root status register */
pci_read_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, &dconfig);
pci_write_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, dconfig);
}
return 0;
}
/**
* Return the mapping of PCI device number to IRQ line. Each
* character in the return string represents the interrupt
......@@ -136,9 +255,8 @@ int __init octeon_pci_pcibios_map_irq(const struct pci_dev *dev,
}
/**
/*
* Read a value from configuration space
*
*/
static int octeon_read_config(struct pci_bus *bus, unsigned int devfn,
int reg, int size, u32 *val)
......@@ -174,15 +292,8 @@ static int octeon_read_config(struct pci_bus *bus, unsigned int devfn,
}
/**
/*
* Write a value to PCI configuration space
*
* @bus:
* @devfn:
* @reg:
* @size:
* @val:
* Returns
*/
static int octeon_write_config(struct pci_bus *bus, unsigned int devfn,
int reg, int size, u32 val)
......@@ -251,10 +362,8 @@ static struct pci_controller octeon_pci_controller = {
};
/**
/*
* Low level initialize the Octeon PCI controller
*
* Returns
*/
static void octeon_pci_initialize(void)
{
......@@ -398,7 +507,7 @@ static void octeon_pci_initialize(void)
pci_int_arb_cfg.s.en = 1; /* Internal arbiter enable */
cvmx_write_csr(CVMX_NPI_PCI_INT_ARB_CFG, pci_int_arb_cfg.u64);
}
#endif /* USE_OCTEON_INTERNAL_ARBITER */
#endif /* USE_OCTEON_INTERNAL_ARBITER */
/*
* Preferrably written to 1 to set MLTD. [RDSATI,TRTAE,
......@@ -457,10 +566,8 @@ static void octeon_pci_initialize(void)
}
/**
/*
* Initialize the Octeon PCI controller
*
* Returns
*/
static int __init octeon_pci_setup(void)
{
......
arch/mips/cavium-octeon/pcie.c → arch/mips/pci/pcie-octeon.c
View file @ 01a6221a
......@@ -18,8 +18,7 @@
#include <asm/octeon/cvmx-pescx-defs.h>
#include <asm/octeon/cvmx-pexp-defs.h>
#include <asm/octeon/cvmx-helper-errata.h>
#include "pci-common.h"
#include <asm/octeon/pci-octeon.h>
union cvmx_pcie_address {
uint64_t u64;
......@@ -976,13 +975,13 @@ static int cvmx_pcie_rc_initialize(int pcie_port)
/**
* Map a PCI device to the appropriate interrupt line
*
* @param dev The Linux PCI device structure for the device to map
* @param slot The slot number for this device on __BUS 0__. Linux
* @dev: The Linux PCI device structure for the device to map
* @slot: The slot number for this device on __BUS 0__. Linux
* enumerates through all the bridges and figures out the
* slot on Bus 0 where this device eventually hooks to.
* @param pin The PCI interrupt pin read from the device, then swizzled
* @pin: The PCI interrupt pin read from the device, then swizzled
* as it goes through each bridge.
* @return Interrupt number for the device
* Returns Interrupt number for the device
*/
int __init octeon_pcie_pcibios_map_irq(const struct pci_dev *dev,
u8 slot, u8 pin)
......@@ -1025,12 +1024,12 @@ int __init octeon_pcie_pcibios_map_irq(const struct pci_dev *dev,
/**
* Read a value from configuration space
*
* @param bus
* @param devfn
* @param reg
* @param size
* @param val
* @return
* @bus:
* @devfn:
* @reg:
* @size:
* @val:
* Returns
*/
static inline int octeon_pcie_read_config(int pcie_port, struct pci_bus *bus,
unsigned int devfn, int reg, int size,
......@@ -1156,12 +1155,12 @@ static int octeon_pcie1_read_config(struct pci_bus *bus, unsigned int devfn,
/**
* Write a value to PCI configuration space
*
* @param bus
* @param devfn
* @param reg
* @param size
* @param val
* @return
* @bus:
* @devfn:
* @reg:
* @size:
* @val:
* Returns
*/
static inline int octeon_pcie_write_config(int pcie_port, struct pci_bus *bus,
unsigned int devfn, int reg,
......@@ -1254,7 +1253,7 @@ static struct pci_controller octeon_pcie1_controller = {
/**
* Initialize the Octeon PCIe controllers
*
* @return
* Returns
*/
static int __init octeon_pcie_setup(void)
{
......
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