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lib: sbi: Add function to register new domain

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We add sbi_domain_register() function to help platform code register
a new domain explicitly instead of depending on domain_get() platform
callback. This function will eventually help us completely remove the
domain_get() platform callback.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Anup Patel
2020-12-13 15:09:42 +05:30
committed by Anup Patel
parent 2179777364
commit 7baccfca79
2 changed files with 81 additions and 0 deletions
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10
include/sbi/sbi_domain.h
View File

@@ -146,6 +146,16 @@ void sbi_domain_dump(const struct sbi_domain *dom, const char *suffix);
/** Dump all domain details on the console */
void sbi_domain_dump_all(const char *suffix);
/**
* Register a new domain
* @param dom pointer to domain
* @param assign_mask pointer to HART mask of HARTs assigned to the domain
*
* @return 0 on success and negative error code on failure
*/
int sbi_domain_register(struct sbi_domain *dom,
const struct sbi_hartmask *assign_mask);
/** Finalize domain tables and startup non-root domains */
int sbi_domain_finalize(struct sbi_scratch *scratch, u32 cold_hartid);

71
lib/sbi/sbi_domain.c
View File

@@ -367,6 +367,77 @@ void sbi_domain_dump_all(const char *suffix)
}
}
int sbi_domain_register(struct sbi_domain *dom,
const struct sbi_hartmask *assign_mask)
{
u32 i;
int rc;
struct sbi_domain *tdom;
u32 cold_hartid = current_hartid();
const struct sbi_platform *plat = sbi_platform_thishart_ptr();
if (!dom || !assign_mask)
return SBI_EINVAL;
/* Check if domain already discovered */
sbi_domain_for_each(i, tdom) {
if (tdom == dom)
return SBI_EALREADY;
}
/*
* Ensure that we have room for Domain Index to
* HART ID mapping
*/
if (SBI_DOMAIN_MAX_INDEX <= domain_count) {
sbi_printf("%s: No room for %s\n",
__func__, dom->name);
return SBI_ENOSPC;
}
/* Sanitize discovered domain */
rc = sanitize_domain(plat, dom);
if (rc) {
sbi_printf("%s: sanity checks failed for"
" %s (error %d)\n", __func__,
dom->name, rc);
return rc;
}
/* Assign index to domain */
dom->index = domain_count++;
domidx_to_domain_table[dom->index] = dom;
/* Clear assigned HARTs of domain */
sbi_hartmask_clear_all(&dom->assigned_harts);
/* Assign domain to HART if HART is a possible HART */
sbi_hartmask_for_each_hart(i, assign_mask) {
if (!sbi_hartmask_test_hart(i, dom->possible_harts))
continue;
tdom = hartid_to_domain_table[i];
if (tdom)
sbi_hartmask_clear_hart(i,
&tdom->assigned_harts);
hartid_to_domain_table[i] = dom;
sbi_hartmask_set_hart(i, &dom->assigned_harts);
/*
* If cold boot HART is assigned to this domain then
* override boot HART of this domain.
*/
if (i == cold_hartid &&
dom->boot_hartid != cold_hartid) {
sbi_printf("Domain%d Boot HARTID forced to"
" %d\n", dom->index, cold_hartid);
dom->boot_hartid = cold_hartid;
}
}
return 0;
}
int sbi_domain_finalize(struct sbi_scratch *scratch, u32 cold_hartid)
{
int rc;