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c6e07f03f7
The LPC HC irq status register bits are set when an LPC IRQSER input is asserted. These irq status bits drive the PSI irq to the CPU interrupt controller. The LPC HC irq status bits are cleared by software writing to the register with 1's for the bits to clear. Existing register write was clearing the irq status bits even when the input was asserted, this results in interrupts being lost. This fix changes the behavior to keep track of the device IRQ status in internal state that is separate from the irq status register, and only allowing the irq status bits to be cleared if the associated input is not asserted. Signed-off-by: Glenn Miles <milesg@linux.ibm.com> [np: rebased before P9 PSI SERIRQ patch, adjust changelog/comments] Reviewed-by: Glenn Miles <milesg@linux.ibm.com> Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
104 lines
2.9 KiB
C
104 lines
2.9 KiB
C
/*
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* QEMU PowerPC PowerNV LPC controller
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*
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* Copyright (c) 2016-2022, IBM Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef PPC_PNV_LPC_H
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#define PPC_PNV_LPC_H
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#include "exec/memory.h"
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#include "hw/ppc/pnv.h"
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#include "hw/qdev-core.h"
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#define TYPE_PNV_LPC "pnv-lpc"
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typedef struct PnvLpcClass PnvLpcClass;
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typedef struct PnvLpcController PnvLpcController;
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DECLARE_OBJ_CHECKERS(PnvLpcController, PnvLpcClass,
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PNV_LPC, TYPE_PNV_LPC)
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#define TYPE_PNV8_LPC TYPE_PNV_LPC "-POWER8"
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DECLARE_INSTANCE_CHECKER(PnvLpcController, PNV8_LPC,
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TYPE_PNV8_LPC)
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#define TYPE_PNV9_LPC TYPE_PNV_LPC "-POWER9"
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DECLARE_INSTANCE_CHECKER(PnvLpcController, PNV9_LPC,
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TYPE_PNV9_LPC)
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#define TYPE_PNV10_LPC TYPE_PNV_LPC "-POWER10"
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DECLARE_INSTANCE_CHECKER(PnvLpcController, PNV10_LPC,
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TYPE_PNV10_LPC)
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struct PnvLpcController {
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DeviceState parent;
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uint64_t eccb_stat_reg;
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uint32_t eccb_data_reg;
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/* OPB bus */
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MemoryRegion opb_mr;
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AddressSpace opb_as;
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/* ISA IO and Memory space */
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MemoryRegion isa_io;
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MemoryRegion isa_mem;
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MemoryRegion isa_fw;
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/* Windows from OPB to ISA (aliases) */
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MemoryRegion opb_isa_io;
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MemoryRegion opb_isa_mem;
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MemoryRegion opb_isa_fw;
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/* Registers */
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MemoryRegion lpc_hc_regs;
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MemoryRegion opb_master_regs;
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/* OPB Master LS registers */
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uint32_t opb_irq_route0;
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uint32_t opb_irq_route1;
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uint32_t opb_irq_stat;
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uint32_t opb_irq_mask;
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uint32_t opb_irq_pol;
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uint32_t opb_irq_input;
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/* LPC device IRQ state */
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uint32_t lpc_hc_irq_inputs;
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/* LPC HC registers */
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uint32_t lpc_hc_fw_seg_idsel;
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uint32_t lpc_hc_fw_rd_acc_size;
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uint32_t lpc_hc_irqser_ctrl;
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uint32_t lpc_hc_irqmask;
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uint32_t lpc_hc_irqstat;
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uint32_t lpc_hc_error_addr;
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/* XSCOM registers */
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MemoryRegion xscom_regs;
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/* PSI to generate interrupts */
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qemu_irq psi_irq;
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};
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struct PnvLpcClass {
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DeviceClass parent_class;
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DeviceRealize parent_realize;
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};
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ISABus *pnv_lpc_isa_create(PnvLpcController *lpc, bool use_cpld, Error **errp);
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int pnv_dt_lpc(PnvChip *chip, void *fdt, int root_offset,
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uint64_t lpcm_addr, uint64_t lpcm_size);
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#endif /* PPC_PNV_LPC_H */
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