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From: Sven Schnelle <svens@stackframe.org>
To: Helge Deller <deller@gmx.de>
Cc: linux-parisc@vger.kernel.org
Subject: [PATCH 1/2] parisc/firmware: add functions to retrieve TOC data
Date: Sun, 10 Oct 2021 20:38:14 +0200	[thread overview]
Message-ID: <20211010183815.5780-2-svens@stackframe.org> (raw)
In-Reply-To: <20211010183815.5780-1-svens@stackframe.org>

Add functions to retrieve TOC data from firmware both
for 1.1 and 2.0 PDC.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
---
 arch/parisc/include/asm/pdc.h      |  2 ++
 arch/parisc/include/uapi/asm/pdc.h | 22 ++++++++++++++++++++
 arch/parisc/kernel/firmware.c      | 32 ++++++++++++++++++++++++++++++
 3 files changed, 56 insertions(+)

diff --git a/arch/parisc/include/asm/pdc.h b/arch/parisc/include/asm/pdc.h
index b388d8176588..18b957a8630d 100644
--- a/arch/parisc/include/asm/pdc.h
+++ b/arch/parisc/include/asm/pdc.h
@@ -51,6 +51,8 @@ int pdc_spaceid_bits(unsigned long *space_bits);
 int pdc_btlb_info(struct pdc_btlb_info *btlb);
 int pdc_mem_map_hpa(struct pdc_memory_map *r_addr, struct pdc_module_path *mod_path);
 #endif /* !CONFIG_PA20 */
+int pdc_pim_toc11(struct pdc_toc_pim_11 *ret);
+int pdc_pim_toc20(struct pdc_toc_pim_20 *ret);
 int pdc_lan_station_id(char *lan_addr, unsigned long net_hpa);
 
 int pdc_stable_read(unsigned long staddr, void *memaddr, unsigned long count);
diff --git a/arch/parisc/include/uapi/asm/pdc.h b/arch/parisc/include/uapi/asm/pdc.h
index 15211723ebf5..ad51df8ba952 100644
--- a/arch/parisc/include/uapi/asm/pdc.h
+++ b/arch/parisc/include/uapi/asm/pdc.h
@@ -689,6 +689,28 @@ struct pdc_hpmc_pim_20 { /* PDC_PIM */
 	unsigned long long fr[32];
 };
 
+struct pdc_toc_pim_11 {
+	unsigned int gr[32];
+	unsigned int cr[32];
+	unsigned int sr[8];
+	unsigned int iasq_back;
+	unsigned int iaoq_back;
+	unsigned int check_type;
+	unsigned int hversion;
+	unsigned int cpu_state;
+};
+
+struct pdc_toc_pim_20 {
+	unsigned long long gr[32];
+	unsigned long long cr[32];
+	unsigned long long sr[8];
+	unsigned long long iasq_back;
+	unsigned long long iaoq_back;
+	unsigned int check_type;
+	unsigned int hversion;
+	unsigned int cpu_state;
+};
+
 #endif /* !defined(__ASSEMBLY__) */
 
 #endif /* _UAPI_PARISC_PDC_H */
diff --git a/arch/parisc/kernel/firmware.c b/arch/parisc/kernel/firmware.c
index 7034227dbdf3..9179b4409b63 100644
--- a/arch/parisc/kernel/firmware.c
+++ b/arch/parisc/kernel/firmware.c
@@ -1061,6 +1061,38 @@ int pdc_mem_pdt_read_entries(struct pdc_mem_read_pdt *pret,
 	return retval;
 }
 
+/**
+ * pdc_pim_toc11 - Fetch TOC PIM 1.1 data from firmware.
+ * @ret: pointer to return buffer
+ */
+int pdc_pim_toc11(struct pdc_toc_pim_11 *ret)
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_PIM, PDC_PIM_TOC, __pa(pdc_result),
+			      __pa(ret), sizeof(struct pdc_toc_pim_11));
+	spin_unlock_irqrestore(&pdc_lock, flags);
+	return retval;
+}
+
+/**
+ * pdc_pim_toc20 - Fetch TOC PIM 2.0 data from firmware.
+ * @ret: pointer to return buffer
+ */
+int pdc_pim_toc20(struct pdc_toc_pim_20 *ret)
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_PIM, PDC_PIM_TOC, __pa(pdc_result),
+			      __pa(ret), sizeof(struct pdc_toc_pim_20));
+	spin_unlock_irqrestore(&pdc_lock, flags);
+	return retval;
+}
+
 /**
  * pdc_tod_set - Set the Time-Of-Day clock.
  * @sec: The number of seconds since epoch.
-- 
2.33.0


  reply	other threads:[~2021-10-10 18:38 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-10 18:38 [PATCH v2 0/2] add TOC support Sven Schnelle
2021-10-10 18:38 ` Sven Schnelle [this message]
2021-10-11 15:05   ` [PATCH 1/2] parisc/firmware: add functions to retrieve TOC data Rolf Eike Beer
2021-10-11 20:13     ` Helge Deller
2021-10-12 20:33       ` Sven Schnelle
2021-10-12 20:52         ` Helge Deller
2021-10-10 18:38 ` [PATCH 2/2] parisc: add support for TOC (transfer of control) Sven Schnelle
2021-10-10 19:31   ` Helge Deller
2021-10-10 19:36     ` Sven Schnelle
2021-10-12 10:03       ` Helge Deller
2021-10-15 16:22   ` Rolf Eike Beer
  -- strict thread matches above, loose matches on Subject: below --
2021-10-09 21:38 [PATCH 0/2] add TOC support Sven Schnelle
2021-10-09 21:38 ` [PATCH 1/2] parisc/firmware: add functions to retrieve TOC data Sven Schnelle

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