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We are interested in supporting some XIP x86 platforms which are unable to fetch CPU instructions from system RAM. This requires refactoring our dynamic IRQ/exc code which currently synthesizes assembly language instructions to create IRQ stubs on-the-fly. Instead, a new approach is taken. Given that the configuration at build time specifies the number of required stubs, use this to generate a build time a set of tiny stub functions which simply push a 'stub id' and then call common dynamic interrupt code. The handler function and handler argument is saved in a table keyed by this stub id. CONFIG_EOI_HANDLER_SUPPORTED removed, the code hasn't been conditionally compiled for some time and in all cases we call _loapic_eoi() when finished with an interrupt. Some other out-of-date verbiage in comments related to supporting non-APIC removed. Previously, when dynamic exceptions were created a pointer would be passed in by the caller reserving ram for the stub code. Since this is no longer feasible, two new Kconfig options have been added. CONFIG_NUM_DYNAMIC_EXC_STUBS and CONFIG_NUM_DYNAMIC_EXC_NO_ERR_STUBS control how many stubs are created for exceptions that push an error code, and no error code, respectively. SW Interrupts are no longer triggered by "int <vector>" hard-coded assembly instructions. Instead this is done by sending a self-directed inter-processor interrupt from the LOAPIC, using a new API loapic_int_vect_trigger(). In this way we get rid of dynamically generated code in irq_test_common.h. All interrupts call _loapic_eoi() when finished, since this is now the right thing to do for all IRQs, including SW interrupts. _irq_handler_set() for x86 no longer requires the old function pointer to be supplied. Change-Id: I78993d3d00dd153c9051c518b417cce8d3acee9e Signed-off-by: Andrew Boie <andrew.p.boie@intel.com> |
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.. | ||
console | ||
pci | ||
simple | ||
spi | ||
hpet.h | ||
ioapic.h | ||
k6x_mpu.h | ||
k6x_pmc.h | ||
k20_mcg.h | ||
k20_pcr.h | ||
k20_sim.h | ||
k20_uart.h | ||
k20_watchdog.h | ||
loapic.h | ||
pic.h | ||
rand32.h | ||
system_timer.h |