opensbi.git/lib/utils/irqchip/imsic.c, branch v1.6

lib: sbi_irqchip: Set the IRQ handler when registering a chip

2024-11-28T06:21:56Z

In addition to saving some code size, this moves the decision about setting the top-level external interrupt handler to the irqchip core, not the specific driver, which would be needed to support chained interrupt handlers. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

lib: sbi_irqchip: Call driver warm_init from SBI core

2024-11-28T06:10:17Z

Currently, each platform keeps track of which irqchip driver is in use and calls its warm init function. Since the generic platform may use multiple irqchip drivers, it has logic to track an array of drivers. The code is simplified and made common across platforms by treating warm init and exit as properties of the driver, not the platform. Then the platform's only role is to select and prepare a driver during cold boot. For now, only add a .warm_init hook, since none of the existing drivers need an .exit hook. It could be added in the future if needed. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

lib: sbi_irqchip: Register devices during cold init

2024-11-28T06:07:25Z

Have the SBI irqchip core keep track of registered irqchip devices. This is useful for any callbacks the irqchip driver may have, such as for warm initialization, the external interrupt handler function, and any future support for handling external interrupts (beyond IPIs) in M-mode. This improves on the tracking done in fdt_irqchip.c, as it tracks device instances, not just drivers, so callbacks can target a specific device. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

lib: utils/irqchip: Use sbi_domain_root_add_memrange() for IMSIC

2024-10-25T17:29:56Z

The sbi_domain_root_add_memrange() should be preferred for creating multiple memregions over a range. Update IMSIC driver to use sbi_domain_root_add_memrange() instead of explicitly registering memregions. Signed-off-by: Anup Patel Reviewed-by: Samuel Holland

lib: utils/irqchip: Look up IMSIC data by hart index

2024-09-25T12:36:59Z

This avoids needing to map a hartid to a hart index. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

lib: Delete redundant `ulong`

2024-08-24T09:12:14Z

In `csr_read_allowed` and `csr_write_allowed` macros, has already converted second param to `ulong`. So delete redundant `ulong` where uses csr_read/write_allowed macros. Signed-off-by: Zhang RunMin Reviewed-by: Anup Patel

lib: utils/irqchip: Add sanity checks in imsic_get_data() and imsic_get_target_file()

2024-05-23T05:21:29Z

Add extra sanity checks to prevent the caller getting the invalid result from imsic_get_data() or imsic_get_target_file() when imsic is not initialized correctly. Signed-off-by: Cyan Yang Reviewed-by: Anup Patel

lib: utils/irqchip: Check before initializing imsic

2024-05-16T04:51:16Z

The current mlevel imsic check is only for the platform, which may cause hart without imsic in the platform to trigger an illegal instruction exception when initializing imsic. For example, the platform contains a management hart that only supports wired interrupts. This patch will check if each hart supports Smaia extension before doing imsic initialization to avoid triggering illegal instruction exceptions. Signed-off-by: Cheng Yang Reviewed-by: Anup Patel

lib: sbi: Remove regs paramter of sbi_irqchip_process()

2024-03-19T06:01:33Z

The irqchip handlers will typically not need pointer to trap registers so remove regs parameter of sbi_irqchip_process(). Signed-off-by: Anup Patel Reviewed-by: Samuel Holland Tested-by: Samuel Holland Reviewed-by: Clément Léger

lib: sbi: Allow relaxed MMIO writes in device ipi_send() callback

2023-11-26T13:15:06Z

Currently, we have a smp_wmb() between atomic_raw_set_bit() and ipi_send() device callback whereas the MMIO writes done by the device ipi_send() callback will also include a barrier. We can avoid unnecessary/redundant barriers described above by allowing relaxed MMIO writes in device ipi_send() callback. To achieve this, we simply use wmb() instead of smp_wmb() before calling device ipi_send(). Signed-off-by: Anup Patel Reported-by: Bo Gan