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refactor(gicv3): add helper function to get the limit of SPI INTID 

Add helper function gicv3_get_spi_limit() to get the value of (maximum
SPI INTID + 1), so that some duplicated code can be removed later.

Signed-off-by: Heyi Guo <guoheyi@linux.alibaba.com>
Change-Id: I160c8a88fbb71d22790b8999a84afbfba766f5e7
This commit is contained in:
Heyi Guo 2021-01-20 18:50:16 +08:00
parent b39a1308ab
commit 1e9428ea96
2 changed files with 20 additions and 0 deletions
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19
drivers/arm/gic/v3/gicv3_helpers.c
View File

@ -91,6 +91,25 @@ void gicv3_rdistif_base_addrs_probe(uintptr_t *rdistif_base_addrs,
} while ((typer_val & TYPER_LAST_BIT) == 0U);
}
/*******************************************************************************
* Helper function to get the maximum SPI INTID + 1.
******************************************************************************/
unsigned int gicv3_get_spi_limit(uintptr_t gicd_base)
{
unsigned int spi_limit;
unsigned int typer_reg = gicd_read_typer(gicd_base);
/* (maximum SPI INTID + 1) is equal to 32 * (GICD_TYPER.ITLinesNumber+1) */
spi_limit = ((typer_reg & TYPER_IT_LINES_NO_MASK) + 1U) << 5;
/* Filter out special INTIDs 1020-1023 */
if (spi_limit > (MAX_SPI_ID + 1U)) {
return MAX_SPI_ID + 1U;
}
return spi_limit;
}
/*******************************************************************************
* Helper function to configure the default attributes of (E)SPIs.
******************************************************************************/

1
drivers/arm/gic/v3/gicv3_private.h
View File

@ -233,6 +233,7 @@ void gicr_set_icfgr(uintptr_t base, unsigned int id, unsigned int cfg);
/*******************************************************************************
* Private GICv3 helper function prototypes
******************************************************************************/
unsigned int gicv3_get_spi_limit(uintptr_t gicd_base);
void gicv3_spis_config_defaults(uintptr_t gicd_base);
void gicv3_ppi_sgi_config_defaults(uintptr_t gicr_base);
unsigned int gicv3_secure_ppi_sgi_config_props(uintptr_t gicr_base,