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platform: generic: Tenstorrent Atlantis support

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Add the Tenstorrent Atlantis as a generic-platform. This initial support
enables the single_fw_region option, and verifies and prints HART PMA
CSR configuration.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20260424062520.238403-1-npiggin@gmail.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Nicholas Piggin
2026-04-24 16:25:19 +10:00
committed by Anup Patel
parent 1932ee3f0a
commit 6767861c48
11 changed files with 331 additions and 0 deletions
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platform/generic/tenstorrent/ascalon.c
+53
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/*
* SPDX-FileCopyrightText: (c) 2025-2026 Tenstorrent USA, Inc.
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <sbi/riscv_asm.h>
#include <sbi/sbi_console.h>
#include <sbi/sbi_csr_detect.h>
#include <tenstorrent/ascalon.h>
#include <tenstorrent/pma.h>
#define CSR_PMACFG0 0x7e0
void tt_ascalon_discover_pmas_from_boot_hart(void)
{
struct sbi_trap_info trap = {0};
/* Whisper virtual platform does not implement PMA */
csr_read_allowed(CSR_PMACFG0, &trap);
if (trap.cause)
return;
for (unsigned int i = 0; i < TT_MAX_PMAS; i++) {
u64 pma = csr_read_num(CSR_PMACFG0 + i);
if (!tt_pma_validate(i, pma)) {
sbi_printf("HART%d: Bad boot PMA%02d 0x%016lx\n",
current_hartid(), i, pma);
}
tt_pma_set(i, pma);
if (pma)
tt_pma_print(i, pma);
}
}
void tt_ascalon_verify_pmas_nonboot_hart(void)
{
struct sbi_trap_info trap = {0};
/* Whisper virtual platform does not implement PMA */
csr_read_allowed(CSR_PMACFG0, &trap);
if (trap.cause)
return;
for (unsigned int i = 0; i < TT_MAX_PMAS; i++) {
u64 pma = csr_read_num(CSR_PMACFG0 + i);
if (pma != tt_pma_get(i)) {
sbi_printf("HART%d: Bad boot PMA%02d 0x%016lx does not match boot HART\n",
current_hartid(), i, pma);
}
}
}