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platform: Allow platforms to specify heap size

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We extend struct sbi_platform and struct sbi_scratch to allow platforms
specify the heap size to the OpenSBI firmwares. The OpenSBI firmwares
will use this information to determine the location of heap and provide
heap base address in per-HART scratch space.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
This commit is contained in:
Anup Patel
2023-04-17 11:28:03 +05:30
committed by Anup Patel
parent aad7a37705
commit 5cf9a54016
9 changed files with 58 additions and 14 deletions
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18
include/sbi/sbi_platform.h
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@@ -29,12 +29,16 @@
#define SBI_PLATFORM_HART_COUNT_OFFSET (0x50)
/** Offset of hart_stack_size in struct sbi_platform */
#define SBI_PLATFORM_HART_STACK_SIZE_OFFSET (0x54)
/** Offset of heap_size in struct sbi_platform */
#define SBI_PLATFORM_HEAP_SIZE_OFFSET (0x58)
/** Offset of reserved in struct sbi_platform */
#define SBI_PLATFORM_RESERVED_OFFSET (0x5c)
/** Offset of platform_ops_addr in struct sbi_platform */
#define SBI_PLATFORM_OPS_OFFSET (0x58)
#define SBI_PLATFORM_OPS_OFFSET (0x60)
/** Offset of firmware_context in struct sbi_platform */
#define SBI_PLATFORM_FIRMWARE_CONTEXT_OFFSET (0x58 + __SIZEOF_POINTER__)
#define SBI_PLATFORM_FIRMWARE_CONTEXT_OFFSET (0x60 + __SIZEOF_POINTER__)
/** Offset of hart_index2id in struct sbi_platform */
#define SBI_PLATFORM_HART_INDEX2ID_OFFSET (0x58 + (__SIZEOF_POINTER__ * 2))
#define SBI_PLATFORM_HART_INDEX2ID_OFFSET (0x60 + (__SIZEOF_POINTER__ * 2))
#define SBI_PLATFORM_TLB_RANGE_FLUSH_LIMIT_DEFAULT (1UL << 12)
@@ -138,6 +142,10 @@ struct sbi_platform_operations {
/** Platform default per-HART stack size for exception/interrupt handling */
#define SBI_PLATFORM_DEFAULT_HART_STACK_SIZE 8192
/** Platform default heap size */
#define SBI_PLATFORM_DEFAULT_HEAP_SIZE(__num_hart) \
(0x8000 + 0x800 * (__num_hart))
/** Representation of a platform */
struct sbi_platform {
/**
@@ -160,6 +168,10 @@ struct sbi_platform {
u32 hart_count;
/** Per-HART stack size for exception/interrupt handling */
u32 hart_stack_size;
/** Size of heap shared by all HARTs */
u32 heap_size;
/** Reserved for future use */
u32 reserved;
/** Pointer to sbi platform operations */
unsigned long platform_ops_addr;
/** Pointer to system firmware specific context */