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/*
* Copyright (c) 2012, ARM Limited. All rights reserved.
*
* Redistribution and use in source and binary forms, with
* or without modification, are permitted provided that the
* following conditions are met:
*
* Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
*
* Redistributions in binary form must reproduce the
* above copyright notice, this list of conditions and
* the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of ARM nor the names of its
* contributors may be used to endorse or promote products
* derived from this software without specific prior written
* permission.
*/
#include "int_master.h"
#include "gic_registers.h"
#include "virt_helpers.h"
#include "misc.h"
#include "events.h"
#include "vgiclib.h"
/*
* The Big-little spftware needs to bother itself with
* bareminimal vGIC configuration.
*
* 1. Distributor. Security bits should be taken care of
* by the boot firmaware after a cold reset. Big-little
* code should initialise private interrupts as secure
* after a warm reset.
*
* 2. Physical Cpu interface. Initialised by us after
* both warm and cold reset.
*
* 3. Virtual CPU interface (HYP view). Initialised by us
* after cold reset & restored after warm reset.
*
* 4. Virtual CPU interface (CPU view). Initialised by
* the payload software after cold reset and restored by
* us after a warm reset.
*/
static void gic_cpuinit()
{
/* Disable the PCPUIF before configuring it. */
write32(GIC_IC_PHY_BASE + GICC_CTL, 0x0);
write32(GIC_IC_PHY_BASE + GICC_BP, 0x0);
write32(GIC_IC_PHY_BASE + GICC_PRIMASK, 0xFF);
/* Enable split EOI & Non-secure PCPUIF */
write32(GIC_IC_PHY_BASE + GICC_CTL, 0x201);
}
void SetupVGIC(unsigned warm_reset)
{
/*
* Initialise the HYP view Virtual CPU interface after
* a cold reset
*/
if (!warm_reset)
vgic_init();
/* Initialise the Physical cpu interface */
gic_cpuinit();
/*
* Enable Virtual exceptions
*/
write_hcr(read_hcr() | HCR_AMO | HCR_IMO | HCR_FMO);
/*
* TODO: Barriers not needed here as there will surely
* be others further down the line before virtual
* exceptions are used.
*/
return;
}
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