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lib: Move software interrupt enablement from firmware to lib
The secondary hart waits for an IPI signal from the boot hart to executing boot code (hot boot). As a result, software generated interrupts have to be enabled for secondary harts before waiting for the boot hart boot completion IPI signal. Enabling software generated interrupts (IPI) can be done independently of the firmware code and moved to libsbi code so that the different firmware do not have to implement this. Signed-off-by: Atish Patra <atish.patra@wdc.com>
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1ee745fe57
commit
784a4657c0
2 changed files with 4 additions and 4 deletions
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@ -125,10 +125,6 @@ _start_warm:
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csrw mie, zero
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csrw mip, zero
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/* Set MSIE bit to receive IPI */
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li a2, MIP_MSIP
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csrw mie, a2
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/* Preload per-HART details
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* s6 -> HART ID
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* s7 -> HART Count
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@ -304,6 +304,10 @@ void sbi_hart_wait_for_coldboot(struct sbi_scratch *scratch, u32 hartid)
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if ((sbi_platform_hart_count(plat) <= hartid) ||
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(COLDBOOT_WAIT_BITMAP_SIZE <= hartid))
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sbi_hart_hang();
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/* Set MSIE bit to receive IPI */
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csr_set(mie, MIP_MSIP);
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do {
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spin_lock(&coldboot_wait_bitmap_lock);
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coldboot_wait_bitmap |= (1UL << hartid);
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