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hw/pci-host/pam: Replace magic number by PAM_REGIONS_COUNT definition

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While this change helps triskaidekaphobic developers, it
is a good practice to avoid magic values and using constant
definitions instead.

Introduce the PAM_REGIONS_COUNT and use it. No logical change.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Julia Suvorova <jusual@redhat.com>
Message-Id: <20201202132038.1276404-1-philmd@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Philippe Mathieu-Daudé 2020-12-02 14:20:38 +01:00 committed by Laurent Vivier
parent 01d152c0bf
commit f6a3c86ebd
5 changed files with 6 additions and 4 deletions
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2
hw/pci-host/pam.c
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@ -62,7 +62,7 @@ void init_pam(DeviceState *dev, MemoryRegion *ram_memory,
void pam_update(PAMMemoryRegion *pam, int idx, uint8_t val)
{
assert(0 <= idx && idx <= 12);
assert(0 <= idx && idx < PAM_REGIONS_COUNT);
memory_region_set_enabled(&pam->alias[pam->current], false);
pam->current = (val >> ((!(idx & 1)) * 4)) & PAM_ATTR_MASK;

2
hw/pci-host/q35.c
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@ -641,7 +641,7 @@ static void mch_realize(PCIDevice *d, Error **errp)
init_pam(DEVICE(mch), mch->ram_memory, mch->system_memory,
mch->pci_address_space, &mch->pam_regions[0],
PAM_BIOS_BASE, PAM_BIOS_SIZE);
for (i = 0; i < 12; ++i) {
for (i = 0; i < ARRAY_SIZE(mch->pam_regions) - 1; ++i) {
init_pam(DEVICE(mch), mch->ram_memory, mch->system_memory,
mch->pci_address_space, &mch->pam_regions[i+1],
PAM_EXPAN_BASE + i * PAM_EXPAN_SIZE, PAM_EXPAN_SIZE);

2
include/hw/pci-host/i440fx.h
View File

@ -29,7 +29,7 @@ struct PCII440FXState {
MemoryRegion *system_memory;
MemoryRegion *pci_address_space;
MemoryRegion *ram_memory;
PAMMemoryRegion pam_regions[13];
PAMMemoryRegion pam_regions[PAM_REGIONS_COUNT];
MemoryRegion smram_region;
MemoryRegion smram, low_smram;
};

2
include/hw/pci-host/pam.h
View File

@ -80,6 +80,8 @@
#define SMRAM_C_BASE_SEG_MASK ((uint8_t)0x7)
#define SMRAM_C_BASE_SEG ((uint8_t)0x2) /* hardwired to b010 */
#define PAM_REGIONS_COUNT 13
typedef struct PAMMemoryRegion {
MemoryRegion alias[4]; /* index = PAM value */
unsigned current;

2
include/hw/pci-host/q35.h
View File

@ -44,7 +44,7 @@ struct MCHPCIState {
MemoryRegion *pci_address_space;
MemoryRegion *system_memory;
MemoryRegion *address_space_io;
PAMMemoryRegion pam_regions[13];
PAMMemoryRegion pam_regions[PAM_REGIONS_COUNT];
MemoryRegion smram_region, open_high_smram;
MemoryRegion smram, low_smram, high_smram;
MemoryRegion tseg_blackhole, tseg_window;