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The mtval CSR is very useful information when debugging hence
print it upon trap error in sbi_trap_error().
Signed-off-by: Anup Patel <[email protected]>
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Instead of having separate timer_init() hooks for cold and
warm boot, this patch updates struct sbi_platform to have just
one timer_init() hook. The type of boot (cold or warm) is now
a boolean flag parameter for the updated timer_init() hook.
Signed-off-by: Anup Patel <[email protected]>
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Instead of having separate ipi_init() hooks for cold and warm boot,
this patch updates struct sbi_platform to have just one ipi_init()
hook. The type of boot (cold or warm) is now a boolean flag parameter
for the updated ipi_init() hook.
Signed-off-by: Anup Patel <[email protected]>
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Instead of having separate irqchip_init() hooks for cold and
warm boot, this patch updates struct sbi_platform to have just
one irqchip_init() hook. The type of boot (cold or warm) is now
a boolean flag parameter for the updated irqchip_init() hook.
Signed-off-by: Anup Patel <[email protected]>
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Instead of having separate early_init() and final_init() hooks
for cold and warm boot, this patch updates struct sbi_platform
to have just one early_init() and one final_init() hook. The
type of boot (cold or warm) is now a boolean flag parameter for
the updated early_init() and final_init() hooks.
Signed-off-by: Anup Patel <[email protected]>
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This patch moves all ECALL defines to sbi_ecall_interface.h so
that it can be shared with firmware payloads.
Signed-off-by: Anup Patel <[email protected]>
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We generally don't get misaligned load/store traps from Linux/U-Boot
compiled using GCC 8.2 or higher but this is not true with older
GCC toolchains. To tackle this we add misaligned load/store trap
handling adopted from BBL sources but much more simpler.
(Note: BBL sources can be found at https://github.com/riscv/riscv-pk.git)
Signed-off-by: Anup Patel <[email protected]>
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This patch moves all instruction encoding macros to
riscv_encoding.h.
Signed-off-by: Anup Patel <[email protected]>
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As of now, uboot doesn't have support for SMP.
Moreover, unleashed board has a E51 hart which
doesn't not support S mode.
We should only boot only 1 non-zero hart.
Signed-off-by: Atish Patra <[email protected]>
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Conditionnally delegate page fault exceptions from M mode to S mode
based on the platform features.
Signed-off-by: Damien Le Moal <[email protected]>
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The sbi_hart_switch_mode() will be used by CPU hotplug. This means
if we have prints in sbi_hart_switch_mode() then these prints will
mix with Linux prints.
Being a runtime firmware, we should be verbose only at coldboot
time and error situations.
Signed-off-by: Anup Patel <[email protected]>
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commit d403c70fb11fb55042ca3cef0dbe399ed87cc79b breaks Linux
booting because of fewer exceptions delegated to S-mode. This
patch fixes Linux booting by having all required exceptions
delegated to S-mode.
Signed-off-by: Anup Patel <[email protected]>
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Avoid getting messages from multiple harts mingled into garbage text
with a spinlock serializing calls to sbi_puts() and sbi_printf().
Signed-off-by: Damien Le Moal <[email protected]>
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Use this helper instead of hardcoding csr_read(mhartid).
Signed-off-by: Damien Le Moal <[email protected]>
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Cleanup sbi_hart_boot_nexti() code, adding messages for clarity and
rename the function to sbi_hart_switch_mode() to reflect what the
function actually does.
Signed-off-by: Damien Le Moal <[email protected]>
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When S mode is not supported, simply clear mideleg and medeleg.
Otherwise, set delegation from M-mode to S-mode, removing the page
fault exceptions as those would not happen in M-mode.
Signed-off-by: Damien Le Moal <[email protected]>
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Make it clear that the end of the FW execution was reached without the
hand being passed to any payload.
Signed-off-by: Damien Le Moal <[email protected]>
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Signed-off-by: Damien Le Moal <[email protected]>
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Allow a platform to report its supported features in more details.
The new features defined are:
* SBI_PLATFORM_HAS_PMP
* SBI_PLATFORM_HAS_SCOUNTEREN
* SBI_PLATFORM_HAS_MCOUNTEREN
In addition, define the macro SBI_PLATFORM_DEFAULT_FEATURES as the set
of features that are generally expected to be supported by a Linux
capable platform.
Operations touching the features controlled with these falgs are not
executed if the platform does not set the corresponding feature flags.
Signed-off-by: Damien Le Moal <[email protected]>
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We should not jump to next stage if next mode (S-mode or U-mode)
is not supported by HART.
Signed-off-by: Atish Patra <[email protected]>
Signed-off-by: Anup Patel <[email protected]>
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On QEMU Virt, max supported HARTs are 8 but number of HARTs
actually depend on "-smp" command-line parameter passed to
QEMU. This creates problems in sbi_hart_wake_coldboot_harts()
because when number of HARTs are less than 8.
To tackle this, we introduce a bitmap to track HARTs waiting
for coldboot to finish. We wake only those HARTs who have
set their bit in coldboot bitmap.
Signed-off-by: Anup Patel <[email protected]>
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This patch removes unwanted sbi_printf() from
sbi_hart_wait_for_coldboot().
Signed-off-by: Anup Patel <[email protected]>
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Signed-off-by: Atish Patra <[email protected]>
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Signed-off-by: Atish Patra <[email protected]>
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Signed-off-by: Atish Patra <[email protected]>
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Emulation of CSR read for misa and mhartid was a workaround for
bootloader accessing these CSRs in S-mode. This patch removes
CSR read emulation for misa and mhartid.
Signed-off-by: Anup Patel <[email protected]>
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Signed-off-by: Anup Patel <[email protected]>
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